top of page
Writer's pictureWilson Pipeline

UNS S34700 347 Stainless Steel Pipes, Flanges, Pipe Fittings

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)

0 views0 comments

Recent Posts

See All

Knowledge About Steel Elbow

Elbows 45° - 90° - 180° LR/SR The function of a elbow is to change direction or flow in a piping system. By default, there are 5...

Knowledge About Buttweld Fittings

Buttweld Fittings general A pipe fitting is defined as a part used in a piping system, for changing direction, branching or for change of...

List of Chemical Elements

Flange Fittings&Pipes origin supplier from china Wilson Pipeline WhatsApp+8618632758880 sales@wilsonpipeline.com www.wilsonpipeline.com

Comentarios


bottom of page