Duplex Stainless Steel 2205 (UNS S31803) is one of the most recognized and widely used duplex stainless steel grade, with excellent general corrosion resistance and superiority over grade 304 or 316 in most environments. wilsonpipeline is a manufacturer and supplier of various grades of duplex stainless steels including UNS 31803 (F51) and UNS 32205 (F60) Alloy 2205. The ratio of ferrite to austenite in Duplex stainless steel is approximately 50:50.
The characteristic feature of duplex stainless steels is their dual phase microstructure, comprising of approximately 50% of austenitic and 50% of ferrite. The yield strength of duplex stainless steel is typically double that of austenitic stainless steel.
Duplex stainless steel fittings, duplex stainless steel pipes and duplex stainless steel flanges are one of the key product items of wilsonpipeline and are widely supplied from stock to various industries such as chemical, petrochemical, marine, oil and gas and transportation. Duplex pipes, tubing’s and fittings are widely used for oil field piping works and heat exchangers.
Duplex stainless steel pipes and duplex stainless steel pipe fittings are considered as a cost effective grade due to lower nickel and molybdenum contents than their austenitic counterparts of similar corrosion resistance. Due to the lower alloying content, duplex stainless steels are generally lower in cost. Also, due to higher yield strength it could also be possible to reduce the thickness of duplex stainless steel products, compared to austenitic stainless steel. The dual benefit of lower prices and weight savings make duplex stainless steels economically very effective for project managers.
When compared to 2205 grade duplex stainless steel, 904L has similar corrosion resistant properties but lower mechanical strength. 2205 is also a lower cost option compared to 904L, but is not suitable for temperatures above 300°C. Grade 2205 is not generally suitable for use at temperatures above 300°C as it suffers from precipitation of brittle micro-constituents, nor below -50°C because of its ductile-to-brittle-transition.
Duplex Stainless Steel – Alloy 2205 (UNS S31803) Specifications
Duplex Stainless Steel Grade Forgings: ASTM A182 UNS S31803 – Forgings Grade F51
Duplex Stainless Steel Grade Castings: ASTM A890 grade 4A
Seamless Duplex Stainless Steel Pipes / Tubes: ASTM A 789 / 790, ASME SA 789 / 790
Welded Duplex Stainless Steel Tubes / Pipes: ASTM A 789 / 790, ASME SA 789 / 790
Duplex Stainless Steel Pipe Fittings & Duplex Stainless Steel Flanges: ASTM A 815, ASME SA 815
Duplex 2205 Chemical Composition, %
22.0-23.0
4.50-6.50
3.00-3.50
.030 Max
0.14-0.20
Mn
Si
P
S
Fe
2.00 Max
1.00 Max
.030 Max
.020 Max
Balance
Physical & Mechanical Properties of Duplex Stainless Steel Grade 2205
Duplex Stainless Steel
Density
7.805
Melting Range,℃
1450 ℃
Elongation %
25 min.
Tensile Strength (Mpa)
655
Yield Strngth (Mpa)
450
Hardness (Brinell)
293 max
* Technical specifications included herein should be used as a guideline only
UNS S31803, 2205 Duplex Pipes, Tubes / Tubing, and Butt Weld Fittings
Duplex stainless steel pipes and Duplex stainless steel tubes are available mainly in seamless form in both OD and NB sizes. In addition to standard sizes, which are available in stock, our specialty is to manufacture and supply custom size Alloy Duplex cold drawn seamless tubes from our factory. Duplex pipes and tubes can be offered in random lengths of up to 6meters long or cut to a specific length as ordered.
UNS S31803, 2205 Duplex Seamless, Welded Pipe/ Tube, and Fittings Dimensions Out diameterWall thicknessLengthPipe NB Sizes1/4 “ ~ 16”SCH 5 / SCH 10 / SCH 40 / SCH 80 / SCH 160Upto 6 MetersButt Weld Fittings NB Sizes1/2″ ~ 12”SCH 5 / SCH 10 / SCH 40 / SCH 80 / SCH 160–Seamless (Custom Sizes)5.0mm ~ 203.2mmAs per requirementUpto 6 MetersWelded (in Stock + Custom Sizes)5.0mm ~ 1219.2mm1.0 ~ 15.0 mmUpto 6 Meters
wilsonpipeline Pipe Industry Co., Limited
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