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Stainless Steel 904L is a non-stabilised low carbon high alloy austenitic stainless steel. The addition of copper to this grade gives it greatly improved resistance to strong reducing acids, particularly sulphuric acid. It is also highly resistant to chloride attack – both pitting crevice corrosion and stress corrosion cracking. This grade is non-magnetic in all conditions and has excellent weldability and formability. The austenitic structure also gives this grade excellent toughness, even down to cryogenic temperatures. Stainless Steel 904L does have very substantial contents of the high cost ingredients nickel and molybdenum. Many of the applications in which this grade has previously performed well can now be fulfilled at lower cost by duplex stainless steel 2205 (S31803 or S32205), so it is used less commonly than in the past. Chemical composition (average %)CSiMnCrMoNiCuN0,0200,500,7520,304,5025,101,500,06 StandardsDINAFNORUNSSIS1.4539 X1NiCrMoCu25-20-5Z2NCDU25-20N089042562 Mechanical properties at room temperature Condition: solution quenchedProductDimensions0.2% proof stress1% proof stress Tensile strenghtElongation A5Impact strenght (ISO-V)mmN/mm² minN/mm² minN/mm²LQTLQTBI< 30—35——55—St.Sch< 160220250520-72040——85——St = Bars Sch = Forgings BI = Sheet or Plate L = Longitudinal Q = Transverse T = TangentialThe values for others products and dimensions shall be establishedin accordance with relevant specifications by agreement. High – Temperature propertiesTemperature50°C100°C150°C200°C250°C300°C350°C400 °C0.2% proof stress N/mm² min1901751651551451351301251% proof stress N/mm² min220205195185175165160155 Physical propertiesDensity at20°C8.00 g/dmThermal conductivity at20°C12 W/(mK)Specific heat at20°C0.45 J/(gK)Electric resistivity at20°C1.00 Ohm mm/mModulus of elasticity at20°C197 x 10 N/mmMagnetic propertiesCan be slightly magneticThermal expansion between 20°C e …°C 10 m/(mK)Temperature10 m/(mK)100°C15.8200°C16.1300°C16.5400°C16.9500°C17.3Modulus of elasticity, 10 N/mm atTemperature10 N/mm20°C197100°C191200°C184300°C177400°C170500°C163 Corrosion Resistance Although originally developed for its resistance to sulphuric acid it also has a very high resistance to a wide range of environments. A PRE of 35 indicates that the material has good resistance to warm sea water and other high chloride environments. High nickel content results in a much better resistance to stress corrosion cracking than the standard austenitic grades. Copper adds resistance to sulphuric and other reducing acids, particularly in the very aggressive “mid concentration” range. In most environments Stainless Steel 904L has a corrosion performance intermediate between the standard austenitic grade 316L and the very highly alloyed 6% molybdenum and similar “super austenitic” grades. In aggressive nitric acid Stainless Steel 904L has less resistance than molybdenum-free grades such as Stainless Steel 904LL andStainless Steel 310L. For maximum stress corrosion cracking resistance in critical environments the steel should be solution treated after cold work. Heat Resistance Good resistance to oxidation, but like other highly alloyed grades suffers from structural instability (precipitation of brittle phases such as sigma) at elevated temperatures. Stainless Steel 904L should not be used above about 400C. Heat Treatment Solution Treatment (Annealing) – heat to 1090-1175C and cool rapidly. This grade cannot be hardened by thermal treatment. Welding Stainless Steel 904L can be successfully welded by all standard methods. Care needs to be taken as this grade solidifies fully austenitic, so is susceptible to hot cracking, particularly in constrained weldments. No pre-heat should be used and in most cases post weld heat treatment is also not required. AS 1554.6 pre-qualifies Grade 904L rods and electrodes for welding of 904L. Fabrication Stainless Steel 904L is a high purity, low sulphur grade, and as such will not machine well. Despite this the grade can be machined using standard techniques. Bending to a small radius is readily carried out. In most cases this is performed cold. Subsequent annealing is generally not required, although it should be considered if the fabrication is to be used in an environment where severe stress corrosion cracking conditions are anticipated. APPLICATIONS FIELD : Industry Applications Industry Applications Chemical Heat Exchanger,Boiler Sugar Evaporators, Condensers, Driers Petrochemicals Condensers Automobiles Muffler Tubes Hydraulic Tubing Refineries General Piping Construction Architectural Furniture Fertilizers Pressure Vessels Pharmaceuticals, Dairy, Food & Beverages Machineries Process Piping, Stainless Steel U Tubes Paper & Pulp Industrial Equipments Submersible Pumps Pump Casing Applications Engineering Machineries Instrumentation Tubing Oil and Gas Stainless Steel pipes, Stainless Steel Pipe Fittings, Stainless Steel Flanges wilsonpipeline Pipe Industry Co., Limited offers a comprehensive range of 904L Stainless Steel Pipes and 904L Stainless Steel Tubes. 904L Stainless Steel Pipes and 904L Stainless Steel Tubes Product Range 904L Stainless Steel Pipes and 904L Stainless Steel Tubes Specifications: ASTM A/ASME SA 269/677 904L Stainless Steel Pipes and 904L Stainless Steel Tubes Sizes (Seamless): 1/2″ NB – 8″ NB 904L Stainless Steel Pipes and 904L Stainless Steel Tubes Sizes (ERW): 1/2″ NB – 24″ NB 904L Stainless Steel Pipes and 904L Stainless Steel Tubes Sizes (EFW): 6″ NB – 100″ NB 904L Stainless Steel Pipes and 904L Stainless Steel Tubes Wall Thickness available: Schedule 5S – Schedule XXS (heavier on request) 904L Stainless Steel Pipes and 904L Stainless Steel Tubes Other Materials Testing: NACE MR0175, H2 SERVICE, OXYGEN SERVICE, CRYO SERVICE, etc These properties are specified for flat rolled product (plate, sheet and coil) in ASTM B625. Similar but not necessarily identical properties are specified for other products such as pipe, tube and bar in their respective specifications. Source: wilsonpipeline Pipe Industry Co., Limited (www.wilsonpipeline.com)

Stainless Steel 904L is a low carbon high alloy austenitic stainless steel, with an chromium, nickel, molybdenum and copper content,  which is widely used in applications where the corrosion properties of  Stainless Steel 316L & Stainless Steel 317L are not adequate. although originally develop for greatly improved resistance to strong reducing acids, particularly sulphuric acid. It also has an very high resistance to a wide range of  environments. This feature has been verified that it is very successful after many years of practical applications, which has results that Stainless Steel 904L has been standardized in many countries. Characteristics: The high Mo and the addition of copper to this grade gives it greatly improved resistance to strong reducing acids, particularly aspheric acid It is highly resistant to chloride attack, both pitting crevice corrosion and stress corrosion crashing Good machine ability and weld ability The austenitic structure also gives this grade excellent  toughness, even down to cryogenic temperatures Market applications: Offshore, Oil and gas equipment Stainless Steel Pipe Fittings Chemical industry Seawater cooling equipment Stainless Steel Flanges Aircraft piston engine manifolds and exhaust stacks Stainless Steel Pipes Control and instrumentation Pharmaceutical Pulp and paper industry Technical detailsTechnical composition (%) Fe Cr Ni Mo Mn Cu Si P N C S904Lmin Bal. 19.0 23.0 4.0 – 1.0 0.045 – – – – max – 23.0 28.0 5.0 2.0 2.0 1.00 0.045 0.10 0.020 0.015Mechanical properties 904LTensile strenght (mpa, min) 490 – 700Yield strength (0.2% offset mpa, min) 220Elongation (%, min) 35Density / weight (g / cm3 / kg) 8.05 TENSILE REQUIREMENTS Tensile Strength (KSI) 70  Yield Strength (KSI) 25 KSI can be converted to MPA (Megapascals) by multiplying by 6.895. AVAILABILITY 904L Stainless Steel Elbows 904L Stainless Steel Angle Bars 904L Stainless Steel Bars 904L Stainless Steel Pipe Fittings 904L Stainless Steel Tubes 904L Stainless Steel Flanges 904L Stainless Steel U Tubes 904L Stainless Steel Concentric Reducer 904L Stainless Steel Pipes 904L Stainless Steel Seamless Pipe Source: wilsonpipeline Pipe Industry Co., Limited (www.wilsonpipeline.com)

UNS NO8904, commonly known as stainless steel 904L, is a low carbon high alloy austenitic stainless steel which is widely used in applications where the corrosion properties of AISI stainless steel 316L and AISI stainless steel 317L are not adequate. The addition of copper to this grade gives it corrosion resistant properties superior to the conventional chrome nickel stainless steels, in particular to sulphuric, phosphoric and acetic acids. However, there is limited use with hydrochloric acids. It also has a high resistance to pitting in chloride solutions, a high resistance to both crevice and stress corrosion cracking. Stainless Steel 904L performs better than other austenitic stainless steels due to the higher alloying of nickel and molybdenum. The grade is non-magnetic in all conditions and has excellent formability and weldability. The austenitic structure also gives this grade excellent toughness, even down to cryogenic temperatures. The high chromium content promotes and maintains a passive film which protects the material in many corrosive environments.Stainless Steel 904L has a greater resistance to precipitation of ferrite and sigma phases on cooling and welding than other stainless steels containing molybdenum such as stainless steel 316L and stainless steel 317L. There is no risk of intercrystalline corrosion on cooling or welding due to the low carbon content. Its maximum service temperature is at 450°C. This grade is particularly useful in control and instrumentation tubing applications where stainless steel 316 and stainless steel 317Lare not suitable. Available stainless steel tubes product forms Straight Coiled Seamless Typical Applications Seawater cooling equipment Chemical processing for sulphuric, phosphoric and acetic acids Gas washing Condenser stainless steel tubes Control and instrumentation Heat exchangers Aircraft piston engine manifolds Stainless Steel Pipe Fittings Ball Valves Thermal oxidizers Refinery equipment Stainless Steel flanges Expansion joints High temperature chemical process equipment Typical manufacturing specifications ASTM A213 ASTM A269 ASTM A312 BS EN 10216 pt.5 Also inpidual customer specifications. Industries predominantly using this grade Chemical processing Oil and gas Pharmaceutical TECHNICAL DATA Mechanical PropertiesTemperAnnealedTensile Rm71ksi (min)Tensile Rm490MPa (min)R.p. 0.2% Yield32ksi (min)R.p. 0.2% Yield220MPa (min)Elongation (2” or 4D gl)35% (min) Physical Properties (Room Temperature)Specific Heat (0-100°C)450J.kg-1.°K-1Thermal Conductivity11.5W.m -1.°K-1Thermal Expansion15.8mm/m/°CModulus Elasticity190GPaElectrical Resistivity9.52μohm/cmDensity7.95g/cm3 Chemical Composition (% by weight)ElementMinMaxC–0.2Mn–2Ni2328Cr1923S–0.3Mo45N–0.1Cu12P–0.03Si–0.7 wilsonpipeline Pipe Industry Co., Limited offers 904L Stainless Steel Pipes, 904L Stainless Steel Tubes, 904L Stainless Steel Flanges, 904L Stainless Steel Pipe Fittings, etc. Source: wilsonpipeline Pipe Industry (www.wilsonpipeline.com)

Grade 904L Stainless Steel Composition C: ≤ 0.020 – Mn: ≤2.00 – Si: ≤ 0.70 – Cr: 19.00÷21.00 – Ni: 24.00÷26.00 – Mo: 4.00÷5.00 – N: ≤ 0.15 – Cu: 1.2÷2.0 – S: ≤ 0.010 – P: ≤0.030 Standards EN: X1NiCrMoCu25-20-5 – W.N.: 1.4539 AISI: AISI 904L Description Austenitic stainless steel characterized by good corrosion resistance in high corrosive environments, called also “superaustenitic”. It’s the last chance against corrosion problems before using nickel or cobalt alloys. Its low “C” content , and the high “Mo” “Cr” content endow it with excellent resistance to corrosion even in the presence of chlorine ions. The Ni content of 24¸26% with the addition of copper gives them good strength against stress-corrosion conditions, also in presence of sulphur. This grade is largely used in paper mills, in desulphurization plants, and in chemical industry to synthetise phosphoric and sulphuric acid, and fertilizers. 904L stainless steel combines molybdenum and copper with iron for tremendously increased resistance to reducing acids like sulphuric acid. It stands up extremely well to chlorides in the environment for low pitting and crevice corrosion, as well as stress corrosion cracking. Grade 904L stainless steel is one of many stainless steel grades that can be purchased at wilsonpipeline.com.  The “L” in 904L stands for Low Carbon, specifically, that carbon added to the alloy represents .03 percent or less. This means that 904L has very good welding properties. It is also an austenitic alloy, which means that a nonmagnetic solid solution of ferric carbide or carbon in iron is used to increase corrosion resistance. Properties and Uses of 904L Stainless Steel 904L Stainless Steel cannot be hardened by heat treatment. You can weld 904L stainless using any standard method, but it is susceptible to hot cracking. It can be machined but does not machine well. Common applications take advantage of 904L’s corrosion resistance. These include acid processing plants, pulp and paper operations, equipment for cooling seawater, oil refining, and environmental equipment. Source: wilsonpipeline Pipe Industry (www.wilsonpipeline.com)

Alloy 347 (S34700) is stabilized stainless steel which offers as its main advantage an excellent resistance to intergranular corrosion following exposure to temperatures in the chromium carbide precipitation range from 800 to 1500°F (427 to 816°C). Alloy 347 stainless steel is stabilized by the addition of columbium and tantalum. Alloy 347 stainless steel is also advantageous for high temperature service because of its good mechanical properties. Alloy 347 stainless steel offers higher creep and stress rupture properties than Alloy 304 and, particularly, Alloy 304L, which might also be considered for exposures where sensitization and intergranular corrosion are concerns. General Properties Alloy 347 (UNS S34700) is columbium stabilized austenitic stainless steel with good general corrosion resistance and somewhat better resistance in strong oxidizing conditions than 321 (UNS S32100). It has excellent resistance to intergranular corrosion after exposure to temperatures in the chromium carbide precipitation range of 800 – 1500°F (427 – 816°C). The alloy has good oxidation resistance and creep strength to 1500°F (816°C). It also possesses good low temperature toughness. Alloy 347 stainless steel cannot be hardened by heat treatment, only by cold working. It can be easily welded and processed by standard shop fabrication practices. Applications Chemical Processing Food Processing – equipment and storage Petroleum Refining – fluid catalytic cracking units, polythionic acid service Pharmaceutical Production Waste Heat Recovery – recuperators Standards ASTM……………………..A240ASME……………………..SA240AMS………………………5512 Physical PropertiesDensity 0.288 lbs/in3 7.96 g/cm3 Specific Heat 0.12 BTU/lb-°F (32 – 212°F) 500 J/kg-°K (0 – 100°C) Modulus of Elasticity 28.0 x 106 psi 193 GPa Thermal Conductivity 200°F (100°C) 133 BTU/hr/ft2/ft/°F 16.3 W/m-°K Melting Range 2550 – 2635°F 1398 – 1446°C Electrical Resistivity 72 Microhm-in at 20°F Corrosion Resistance Alloy 347 stainless steel exhibits good general corrosion resistance that is comparable to 304. It was developed for use in the chromium carbide precipitation range of 800 – 1500°F (427 – 816°C) where un-stabilized alloys such as 304 are subject to intergranular attack. In this temperature range, the overall corrosion resistance of Alloy 347 stainless steel is superior to Alloy 321 stainless steel. Alloy 347 also performs somewhat better than Alloy 321 in strongly oxidizing environments up to 1500°F (816°C). The alloy can be used in nitric solutions, most diluted organic acids at moderate temperatures and in pure phosphoric acid at lower temperatures and up to 10% diluted solutions at elevated temperatures. Alloy 347 stainless steel resists polythionic acid stress corrosion cracking in hydrocarbon service. It can also be utilized in chloride or fluoride free caustic solutions at moderate temperatures. Alloy 347 stainless steel does not perform well in chloride solutions, even in small concentrations, or in sulfuric acid. Fabrication Data Alloy 347 stainless steel can be easily welded and processed by standard shop fabrication practices. Hot forming Working temperatures of 2100 – 2250°F (1149 – 1232°C) are recommended for forging, upsetting and other hot working processes. Do not work this alloy at temperatures below 1700°F (927°C). Material must be water quenched or fully annealed after working to re-attain maximum corrosion resistance. Cold forming The alloy is quite ductile and forms easily. Welding Alloy 347 stainless steel can be readily welded by most standard processes. A post weld heat treatment is not necessary. Machining The cold work hardening rate of 347 stainless steel makes it less machinable than 410 stainless steel, but similar to 304. The table below provides relevant machining data. For more information on this source, please visit: www.wilsonpipeline.com

Stainless Steel 904L is a high-alloy austenitic stainless steel with low carbon content. The grade is intended for use under severe corrosive conditions. It has been application proved over many years and was originally developed to resist corrosion in dilute sulfuric acid. It is standardized and approved for pressure vessel use in several countries. Stainless Steel 904L grade is non-magnetic in all conditions and has excellent formability and weldability. The austenitic structure also gives this grade excellent toughness, even down to cryogenic temperatures. Specifications The following specifications cover Stainless Steel 904L AFNOR Z2CNDU 25-20 ASTM B625 ASTM B649 ASTM B673 ASTM B674 ASTM B677 DIN 1.4539 UNS N08904 Related Metals: VLX904(tm) AL 904L(tm) Cronifer 1925 LC(tm) Chemistry Data : Carbon 0.02 max Chromium 19 – 23 Copper 1 – 2 Iron Balance Manganese 2 max Molybdenum 4 – 5 Nickel 23 – 28 Phosphorus 0.045 max Silicon 1 max Sulphur 0.035 max Physical Data : wilsonpipeline is a supplier of stainless steel 904L pipe, stainless steel 904L tube, stainless steel 904L fittings, stainless steel 904L forgings, stainless steel 904L flanges, and stainless steel 904L fasteners including; stainless steel 904L nuts, stainless steel 904L bolts and more. Source: wilsonpipeline Pipe Industry (www.wilsonpipeline.com)

Type 347 stainless steel has slightly improved corrosion resistance over type 321 stainless steel in strongly oxidizing environments. Type 347 stainless steel is stabilized with columbium, it is preferable for aqueous and low temperature environments due to its good resistance to intergranular attack. Both 347 stainless steel and 321 stainless steel offer good resistance to polythionic acid stress corrosion cracking, encountered in oil refineries. The high temperature oxidation resistance of 347 stainless steel is similar to that of 304 stainless steel. Useful to 1500°F. Often in many product forms, the grain size and carbon content can meet both the 347S and 347H requirements. Appropriate weld fillers are AWS ER347 bare wire and E347 covered electrodes. Chemistry Cr Ni Cb + Ta C Si Mn P S FeMIN17.09.0Cb 10xc (Cb 8xC)0.04––––MAX19.013.01.00.080.752.00.0450.03Balance Specifications AMS 5512, AMS 5646, AMS 5680 ASME SA 240 ASTM A 240, ASTM A 269, ASTM A 479, ASTM A262 Practice E MSRR 5632 PWA 300, PWA F17 LCS UNS S34700, UNS S34709 W. Nr./EN 1.4550 Inventory 347 Stainless Steel Flanges, 347 Stainless Steel Angle Bar, 347 Stainless Steel Tubes, 347 stainless steel Pipe Fittings, 347 Stainless Steel Bars Common Trade Names 347 Stainless Steel, 347 Stainless Features Good creep strength up to 1500°F Maintains good corrosion resistance in applications where the temperature is between 800°F and 1500°F. Good resistance to intergranular corrosion in the as welded condition. Applications Oil Refineries Fluid catalytic cracking units (FCC) Stainless Steel Pipes Recuperator stainless steel pipe fittings Especially where temperatures exceed 550°F and resistance to sulfidation is needed Fired heater stainless steel tubes Distributor trays and thermowells Equipment in and around reactors (good resistance to polythionic acid) Stainless Steel Flanges Physical Properties Density: 0.286 lb/inch3  Melting Point: 2550 – 2635°FTemperature, °F70212932Coefficient* of Thermal Expansion, in/in°F x 10-6–9.2–Thermal Conductivity Btu • ft/ft2 • hr • °F–112.5147.7Modulus of Elasticity, Dynamic psi x 10628–– * 70°F to indicated temperature. Mechanical Properties Minimum Specified Properties, ASTM A 240Tensile Strength, ksi750.2% Yield Strength, ksi30Elongation, %40Hardness Max, Brinell201 Typical Tensile and Impact PropertiesTemperature, °F684008001000120013501500Ultimate Tensile Strength, ksi93.373.669.563.552.339.326.40.2% Yield Strength, ksi36.536.629.727.424.522.818.6 * Above data from wilsonpipeline Pipe Industry Co., Limited About wilsonpipeline Pipe Industry Co., Limited Established in 2008, wilsonpipeline Pipe Industry Co., Limited is a professional organizer and one-stop-shop supplier for steel piping system products, including stainless steel pipes and stainless steel tubes, stainless steel forged flanges and butt-welding stainless steel pipe fittings, stainless steel pipe fittings, stainless steel elbows, stainless steel tees, stainless steel reducer, stainless steel stub end, stainless steel gaskets, stainless steel fasteners, stainless steel valves, Sanitary Services etc. in China. We have devoted to providing the best solutions of steel materials and industrial equipment for our respected customers. We supply not only commonly used stainless steel materials (SS304/L,SS316/L,SS321), but also duplex and super duplex steel 1.4547, 1.4462, 1.4410 (S31254,S31803,S32750,S32760), special austenite stainless 310S, 347H, 347, 317L, 904L… wilsonpipeline products are widely used in Shipbuilding, Nuclear power, Marine engineering, Petroleum, Chemical, Mining,Sewage treatment, Natural gas and Pressure vessels and other industries. For more information on this source, please visit: www.wilsonpipeline.com

Type 347 Stainless Steel is a chromium nickel stainless steel which has been modified by the addition of columbium and tantalum. The main advantage of this is an excellent resistance to intergranular corrosion which is common to other austenitic stainless steels following exposure to temperatures of 800° to 1500°F. Type 347 Stainless Steel has about the same general corrosion resistance as Type 302. Type 347 Stainless Steel is generally used where corrosive conditions are severe, such as aircraft exhaust stacks, manifolds and ring collectors. Type 347 Stainless Steel is also used for heavy welded assemblies which cannot be annealed after welding or where the operating conditions cause exposure within the temperature range between 800° to 1500°F. Typical Mechanical PropertiesMaterialYield Strength (ksi)Tensile Strength (ksi)% ElongationHardness HB347 Stainless Steel Sheet (Sol Trtd) AMS 55122570-10540–347 Stainless Steel Bar (Sol Trtd) AMS 5646–––255 max Availability Type 347 Stainless Steel is available in Stainless Steel Flanges, Stainless Steel Pipes, Stainless Steel Bars (Stainless Steel AngleBars, Stainless Steel Flat Bars, Stainless Steel Hex Bars, Stainless Steel Round Bars, Stainless Steel Square Bars), Stainless Steel Tubes , Stainless Steel Pipe Fittings. Specifications 347 / 347H AMS 5512 stainless steel flanges AMS 5556 Seamless/ welded stainless steel tubes AMS 5558 Welded /thin wall stainless steel tubes AMS 5571 Seamless stainless steel tubes AMS 5575 Welded stainless steel tubes AMS 5646 stainless steel flanges AMS 5654 stainless steel flanges (aircraft quality) MIL-T-8606 Seamless stainless steel tubes MIL-T-8606 Welded stainless steel tubes MIL-T-8808 Seamless stainless steel tubes MIL-T-8808 Welded stainless steel flanges MIL-S-6721 ASTM A240 / ASME SA240 ASTM A167 / ASME SA167 ASTM A276 / ASME SA276 ASTM A314 / ASME SA314 ASTM A479 / ASME A479 BS 2S130 BS 2T66 stainless steel flanges BS T72 stainless steel flanges BS 970; 347S17 EN58F / EN58G MSRR 6522 MSRR 6524 WS 1.4544 WS 1.4546 WS 1.4550 WS 1.5446*Tube AFNOR Z6CNNb18-11 UNS S30347 Applications Oil Refineries Fluid catalytic cracking units (FCC) Stainless Steel Pipes Recuperator stainless steel pipe fittings Especially where temperatures exceed 550°F and resistance to sulfidation is needed Fired heater stainless steel tubes Distributor trays and thermowells Equipment in and around reactors (good resistance to polythionic acid) Stainless Steel Flanges About wilsonpipeline Pipe Industry Co., Limited Established in 2008, wilsonpipeline Pipe Industry Co., Limited is a professional organizer and one-stop-shop supplier for steel piping system products, including stainless steel pipes and stainless steel tubes, stainless steel forged flanges and butt-welding stainless steel pipe fittings, stainless steel pipe fittings, stainless steel elbows, stainless steel tees, stainless steel reducer, stainless steel stub end, stainless steel gaskets, stainless steel fasteners, stainless steel valves, Sanitary Services etc. in China. We have devoted to providing the best solutions of steel materials and industrial equipment for our respected customers. We supply not only commonly used stainless steel materials (SS304/L,SS316/L,SS321), but also duplex and super duplex steel 1.4547, 1.4462, 1.4410 (S31254,S31803,S32750,S32760), special austenite stainless 310S, 347H, 347, 317L, 904L… wilsonpipeline products are widely used in Shipbuilding, Nuclear power, Marine engineering, Petroleum, Chemical, Mining,Sewage treatment, Natural gas and Pressure vessels and other industries. wilsonpipeline products are according to national standard GB/T12459, GB/T13401, U.S. standard ANSI/ASME B16.9, ANSI/ASME B16.5/B16.47, ANSI/ASME B16.11, ANSI/ASME B36.19M/ B36.10M, ASME B16.20,British standard BS,Germany standard DIN,Japan standard JIS…, The purpose built nonstandard or special use products as per customer’s demand,  we will try our best to satisfy it. To be a reliable supplier, providing high quality products,very best service and support, wilsonpipeline will do that always! For more information on this source, please visit: www.wilsonpipeline.com

These types of stainless steel are austenitic chromium steels containing colubium.  They are recommended for parts fabricated by welding which cannot be subsequently annealed.  These types also are used for parts which are intermittently heated and cooled to temperatures between 800°F and 1600°F.  The addition of columbium produces a stabilied type of stainless that eliminates carbide precipitation and, consequently, intergranular corrosion. Availability – Stainless Steel 347/347H Seamless Stainless Steel Pipes 1/2″ – 8″ Stainless Steel Tubes 1/2″ – 8″ Weld Stainless Steel Pipes 1/2″ – 12″ Stainless Steel Pipe Fittings 1/2″ – 12″ Stainless Steel Flanges 1/2″ – 12″ Specifications – Stainless Steel 347/347HASTM A312, A403ASME SA312, SA403 Chemical Composition – 347/347HCCoCrMnNiPSSiTaMax Max MaxMaxMax 0.08%Trace*17% – 20%2.0%9% – 13%0.04%0.03%0.75%Trace* *The columbium plus tantalum content shall not be less than 10 times the carbon content and not more than 1.0%.  347H Stainless Steel requires the columbium plus tantalum content to be not less than 8 times the carbon content and not more than 1.0%. Design Features – Stainless Steel 347/347H Superior general corrosion resistance over Type 321 Stainless Steel due to stabilization with columbium. Reduced tendencies to form continuous networks of chromium carbides at the grain boundaries. Better high temperature properties than 304 Stainless Steel or 304L Stainless Steel.  Generally used for parts which are intermittently heated up to 1500°F.  For continuous service the maximum temperature is 1650°F. Type 347 has high carbon (.04 to .10) for better high temperature creep properties. Improved intergranular corrosion resistance. Typical Applications – 347/347H Airplane exhaust manifolds Pump Shafts Mechanical Seals Heat Exchangers Stainless Steel Pipe Fittings Ball Valves Stainless Steel Pipes Boiler shells Process equipment Expansion joints Stainless Steel Flanges (i.e. flanges, slip-ons, blinds, weld-necks, lapjoints, long welding necks, socket welds, elbows, tees, stub-ends, returns, caps, crosses, reducers, and pipe nipples) Cabin heaters Fire walls Flexible couplings Pressure vessels Tensile Requirements – 347/347H Tensile Strength (KSI): 75 Yield Strength (KSI): 30 KSI can be converted to MPA (Megapascals) by multiplying by 6.895. Source: wilsonpipeline Pipe Industry Co., Limited (www.wilsonpipeline.com)

One of the key advantages of stainless steel lies in the materials sheer versatility. The fact that the precise composition of stainless steel can be altered to create a metal which is perfectly suited to a particular task means that it’s basic properties – strength, malleability and resistance to staining and corrosion – can be brought to bear in a wide range of situations. Stainless steels have traditionally been pided into types depending on their microstructure at room temperature, which gives a rough indication of their composition and properties. wilsonpipeline’s stainless steels can be pided into four main types: ferritic stainless steel, martensitic stainless steel and precipitation hardening stainless steel, duplex stainless steel, and austenitic stainless steel – the best steel for you depends on the application. The different stainless steel types are created by adding different levels of various alloys such as chromium or nickel during the manufacturing process. Put simply, there are five basic stainless steel types, each with its’ own inpidual composition and therefore with particular properties which are called for in specific working environments. The types of stainless steel in common use, their properties and composition, are as follows: Ferritic stainless steel Low carbon and nickel content Good corrosion resistance Good weldability and toughness Magnetic The standard ferritic grades are alloyed with chromium (11.2–19%), but with no, or a very small, addition of nickel. As nickel is one of the most expensive alloying elements, and experiences high price volatility, the low nickel content of the ferritic grades makes them more price stable compared to grades with high nickel content. Molybdenum is added to some grades to improve corrosion resistance, while alloying with niobium and/or titanium improves weldability. The ferritic grades are magnetic due to their ferritic microstructure. There are also ferritic grades with increased resistance to high temperatures (800–1,150 °C). These grades are typically alloyed with more carbon than standard ferritic grades to increase creep strength, and with silicon and aluminum to improve resistance to oxidation. Martensitic and precipitation hardening stainless steel High strength High wear resistance Limited corrosion resistance Magnetic The martensitic grades are the smallest group of stainless steels. For improved strength and hardenability they have a higher carbon content compared to other grades, and nitrogen is sometimes added to further improve strength. These grades contain no, or small, amounts of nickel, and molybdenum is seldom added. Adding some nickel and reducing the carbon content improves the poor weldability of martensitic grades. Sometimes sulfur is added to improve the machinability. The precipitation hardening grades are hardened by a special mechanism involving the formation of precipitates within the microstructure. Both martensitic and precipitation hardening stainless steels are magnetic. Duplex stainless steel High strength and toughness Very good corrosion resistance Good weldability Lightweight Magnetic Duplex stainless steel grades have a ferritic-austenitic microstructure that combines many of the beneficial properties of ferritic and austenitic stainless steels. The duplex stainless steel microstructure also contributes to high strength and high resistance to stress corrosion cracking. Duplex stainless steels are characterized by high chromium content (20.1–25.4%) and low nickel content (1.4–7%) compared to austenitic grades. The low nickel content makes duplex stainless steel grades more price stable. Molybdenum (0.3–4%) and nitrogen are added to improve corrosion resistance, while nitrogen also increases strength. The duplexstainless steel grades LDX 2101 and 2304 are sometimes referred to as lean duplex stainless steel grades, while the duplexstainless steel grades 2507 and 4501 are also called 25Cr super duplex stainless steel grades. Due to their ferrite content the duplex stainless steel grades are magnetic. Austenitic stainless steel Good to excellent corrosion resistance Good weldability and formability Good creep resistance Non-magnetic The austenitic stainless steel grades are the largest stainless steel types, and can be pided into five sub-groups: Cr-Mn grades – also referred to as 200-series grades have some of the nickel replaced with manganese and nitrogen Cr-Ni grades – general-purpose grades mainly alloyed with chromium and nickel, but with no molybdenum Cr-Ni-Mo grades – also general-purpose grades, but with increased corrosion resistance due to alloying with molybdenum High-performance grades – high alloying content for use in very demanding environments High-temperature grades – high chromium and nickel content, but no molybdenum, for use at temperatures exceeding 550 °C The austenitic stainless steel grades have good to excellent corrosion resistance, as well as good formability and weldability. Their high impact strength at low temperatures is often exploited in cryogenic applications. The austenitic grades are non-magnetic in the solution-annealed condition. Cold working increases their strength and certain grades are therefore supplied in the temper rolled condition and may then be magnetic due to the presence of some martensite. Glossary Precipitation hardening Hardening by a special mechanism involving the formation of precipitates within the microstructure. Toughness The ability to absorb energy in the plastic range. Creep The time-dependent slow plastic deformation of metals under a constant stress. Oxidation (1) Loss of electrons in a chemical reaction. (2) Corrosion of a metal that is exposed to an oxidizing gas at elevated temperatures. The stainless steel reacts with O2, H2O, CO2 and forms an oxide on the stainless steel surface. Lean duplex stainless steel The duplex stainless steel grades LDX 2101 and 2304 are sometimes referred to as lean duplex grades due to their “lean” chemical composition. 25Cr super duplex stainless steel The duplex stainless steel grades 2507 and 4501 are sometimes referred to as super duplex stainless steel grades as the chromium content is close to 25% in these grades. Annealing Heat treatment that alters the microstructure of a material causing changes in properties such as strength, hardness, and ductility. Established in 2008, wilsonpipeline Pipe Industry Co., Limited is a professional organizer and one-stop-shop supplier for steel piping system products, including steel pipe and tube, forged flange and fittings, butt-welding pipe fittings, elbow, tee, reducer, stub end, gaskets, fasteners, valves, Sanitary Services etc. in China. We have devoted to providing the best solutions of steel materials and industrial equipment for our respected customers. 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347 Stainless Steel Detailed Description Type 347 stainless steel is a stabilized austenitic stainless steel similar to type 304 with an addition of Columbium and Tantalum. The columbium serves to produce a stabilized type of stainless steel which is immune to chromium carbide precipitation. This type of grades are thus recommended for parts fabricated by welding which cannot be susequently annealed or for parts which must operate in service between 800 – 1600°F. Applications Collector rings, airplane exhaust stacks, annealing box covers, stainless steel flanges, stainless steel pipe fittings, jet engine parts,expansion joints, stainless steel tubes, stainless steel bars, stainless steel angle bars flexible metal hose and bellows. Chemistry Typical Carbon: 0.08 max Manganese: 2.00 max Silicon: 0,75 max Chromium: 17.00-19.00 Nickel: 9.00-12.00 Molybdenum: 0.75 max Columbium + Tantalum: 10 x (Carbon + Nitrogen) min-1.00 max Phosphorus:  0.040 max Sulfur: 0.030 max Copper: 0.75 max Iron: Balance Physical Properties Density: 0.288 lbs/in3  7.97 g/cm3 Electrical Resistivity: microhm-in (microhm-cm): 68°F (20°C): 28.7 (73) Specific Heat: BTU/lb/°F (kJ/kg•K): 32-212°F (0-100°C): 0.12 (0.50) Thermal Conductivity: BTU/hr/ft2/ft/°F (W/m•K) At 212°F (100°C): 9.3 (16.0) At 932°F (500°C): 12.8 (22.0) Mean Coefficient of Thermal Expansion:in/in/°F (μm/m•K) 32 – 212°F (0 -100°C):  9.3 x 10-6(16.6) 32 -1000°F (0 -538°C): 10.5x 10-6 (18.9) 32 -1500°F (0 -873°C): 11.4 x 10-6 (20.5) Modulus of Elasticity: ksi (MPa) 28.0 x 106 (1.93 x 105) in tension 11.2 x 106 (0.78 x 105) in torsion Magnetic Permeability: H = 200 Oersteds: Annealed < 1.02 max. Melting Range: °F (°C) 2500 – 2550 (1371 – 1400) Forms Stainless Steel Bars – stainless steel round bars, stainless steel square bars,stainless steel hex bars,stainless steel angle bars,stainless steel flat bars Stainless Steel Pipe Fittings – stainless steel buttwelding fittings and stainless steel forged fittings such as stainless steel elbows,stainless steel tees, stainless steel reducer, stainless steel union Stainless Steel Pipes – stainless steel u tubes, stainless steel tubes Stainless Steel Flanges – stainless steel slip on flanges (SORF/SOFF), stainless steel weld neck flanges (WNRF), stainless steel blind flanges (BLRF), stainless steel threaded flanges (THRF) Mechanical Properties at Room Temperature Properties: Annealed Ultimate Tensile Strength: 75 KSI min (515 MPA min) Yield Strength (0.2% offset): 30 KSI min (205 MPA min) Elongation: 40% min Hardness: Rb 92 max Properties: Tempered Type 347 stainless steel can be cold rolled various tempers.  Contact Ulbrich Technical Services for additional information. Additional Properties Cold Forming 347 stainless steel can be readily formed and drawn. Like most other austenitic stainless steels, type 347 work hardens and may require annealing after severe forming. Heat Treatment 347 stainless steel is non hardenable by heat treatment. It can only be hardened by cold working. Welding 347 stainless steel is weldable by common fusion and resistance methods. Use type 347 or 348 filler rod or electrodes. For best results refer to: wilsonpipeline’s “Welding of Stainless Steels and Other Joining Methods”. Source: wilsonpipeline Pipe Industry (www.wilsonpipeline.com)

347 Stainless Steel Angle Bar, also known as UNS S34700 and Grade 347, is an austenitic stainless steel made of .08% maximum carbon, 17% to 19% chromium, 2% maximum manganese, 9% to 13% nickel, 1% maximum silicon, traces of phosphorus and sulfur, 1% minimum to 10% maximum columbium and tantalum with the balance of iron. Grade 347 is advantageous for high temperature service because of its good mechanical properties; it also has excellent resistance to intergranular corrosion following exposure to temperatures in the chromium carbide precipitation range from 800° to 1500° F. It is similar to Grade 321 with respect to intergranular corrosion which is achieved through the use of columbium as a stabilizing element to maximize this feature. Grade 347 can not be hardened through heat treating, but elevated properties may be obtained through cold reduction. Industries that use 347 Stainless Steel include: Aerospace Valve Oil Refineries Products partially or completely constructed of 347 Stainless Steel include: Aircraft collector rings Chemical production equipment Engine parts Exhaust manifolds High temperature gaskets and expansion joints Rocket engine parts Stainless Steel Bars Fluid catalytic cracking units (FCC) Stainless Steel Pipes Recuperator stainless steel pipe fittings Especially where temperatures exceed 550°F and resistance to sulfidation is needed Fired heater stainless steel tubes Distributor trays and thermowells Equipment in and around reactors (good resistance to polythionic acid) Stainless Steel Flanges Applications Chemical Processing Food Processing – equipment and storage Petroleum Refining – fluid catalytic cracking units, polythionic acid service Pharmaceutical Production Waste Heat Recovery – recuperators 347 Stainless Steel Angle Bar DateSTOCKING DIAMETERS½” TO 24”MATERIAL LENGTHSUP TO 12’ 347 Stainless Steel Bars SPECIFICATIONSUNSTYPEAMSASTMFEDERALCHARACTERISTICSS34700347 Stainless Steel5646 5654A-276 A-314 A-479QQ-S-763347 Stainless Steel is overall superior to 321 Stainless Steel, but with similar characteristics. 347 Stainless Steel is stabilized by cobalt and tantalum, easily welded, resists intergranular corrosion. 347 Stainless Steel CHEMISTRY ANALYSIS CMNPSSICRNIMOCUOTHERM/NM.082..045.031.17. – 19.9. – 13..5.5Cb + Ta = 10xC Max.NM Source: wilsonpipeline Pipe Industry (www.wilsonpipeline.com)