Duplex 2205 Stainless Steel (S31803 / S32205) Flanges, Tube, Pipe, Fittings By yaang.com

Stainless Steel Tradename UNS no. Werkstoff No. Density (g/cm3) Duplex F51 / 2205, F60 S31803 / S32205 1.4462 7.805

Duplex 2205 Stainless Steel (S31803 / S32205) 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. Yaang is a stockholder and supplier of various grades of duplex stainless steels including UNS 31803 (F51) and UNS 32205 (F60) Duplex 2205. The ratio of ferrite to austenite in Duplex stainless steel is approximately 50:50.

The characteristic feature of duplex stainless steel 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 ofyaang and are widely supplied from stock to various industries such as chemical, petrochemical, marine, oil and gas and transportation. Duplex stainless steel tubes, flanges, pipes and fittings are widely used for oil field piping works and heat exchangers, duplex plates are used in manufacturing vessels, while duplex bars are used for manufacturing fasteners and high strength pump shafts.

Duplex stainless steel pipes and 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 – Duplex 2205 (UNS S31803) Specifications

Duplex Grade Forgings: ASTM A182 UNS S31803 – Forgings Grade F51

Duplex Grade Castings: ASTM A890 grade 4A

Seamless Duplex Pipes / Tubes: ASTM A 789 / 790, ASME SA 789 / 790

Welded Duplex Pipes / Tubes: ASTM A 789 / 790, ASME SA 789 / 790

Duplex Stainless Steel Fittings & Flanges :  ASTM A 815, ASME SA 815

Duplex 2205 Chemical Composition, %

Cr Ni Mo C N 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 diameter Wall thickness Length Pipe NB Sizes 1/4 “ ~ 16” SCH 5 / SCH 10 / SCH 40 / SCH 80 / SCH 160 Upto 6 Meters Butt Weld Fittings NB Sizes 1/2″ ~ 12” SCH 5 / SCH 10 / SCH 40 / SCH 80 / SCH 160 - Seamless (Custom Sizes) 5.0mm ~ 203.2mm As per requirement Upto 6 Meters Welded (in Stock + Custom Sizes) 5.0mm ~ 1219.2mm 1.0 ~ 15.0 mm Upto 6 Meters

Source - Zhejiang Yaang Pipe Industry Co., Limited (http://www.yaang.com)