Seamless & Welded Tubing Seamless & Welded Pipe Alloy Pipe Fittings, Alloy Flanges, Alloy Valves Round Bar, Plate/Sheet Specialty Forgings

Duplex Stainless Steel UNS S31803 - UNS S32205 Duplex Plate/Sheet Duplex Seamless & Welded Tube Duplex Seamless & Welded Pipe Duplex Round Bar Duplex Flanges F51 Duplex Specialty Forgings Duplex Seamless & Welded BW Fittings Allows Now offers a large variety of products in Duplex Stainless Steel alloys such as tubing, seamless- and welded pipe, butt weld fittings, flanges, round bar and plate products: Duplex Stainless Steels Ferritic Austenitic UNS S31803    UNS S32205 Tubing Seamless 1/16" - 2" OD 0.016" - 0.250" WT 3 mm - 50 mm OD 0.5 mm - 6.0 mm WT Tubing Welded 1/2" - 6" OD 0.035" - 0.500" WT 12 mm - 150 mm OD 1.0 mm - 12.0 mm WT Pipe Seamless & Welded 1/2" - 36" Sch 10S thru Sch XXS Butt Weld Fittings Seamless & Welded 1/2" - 36" Sch 10S thru Sch XXS Flanges WN & Blind 1/2" - 36" Sch 10S thru Sch XXS 150lbs thru 2500lbs Round Bar 1/2" - 12" Plate 1/8" - 3" thick Called duplex because of its mixed microstructure with about equal proportions of ferrite and austenite, duplex stainless steels are a family of grades, which range in corrosion performance depending on their alloy content. BENEFITS OF DUPLEX STAINLESS STEEL High strength A cost-effective alternative to austenitic stainless steel 316L. High resistance to pitting, crevice corrosion resistance High resistance to stress corrosion cracking, corrosion fatigue and erosion, Good sulfide stress corrosion resistance, Low thermal expansion and higher heat conductivity than austenitic steels, Good workability and weldability, High energy absorption. DUPLEX STAINLESS STEEL APPLICATIONS Heat exchangers, tubes and pipes for production and handling of gas and oil, Heat exchangers and pipes in desalination plants, Pressure vessels, pipes, tanks and heat exchangers for processing and transport of various chemicals, Pressure vessels, tanks and pipes in process industries handling solutions containing chlorides, Rotors, fans, shafts and press rolls where the high corrosion fatigue strength can be utilized, Cargo tanks, piping and welding consumables for chemical tankers. UNS S31803 Carbon Chromium Manganese Molybdenum Nitrogen Nickel Phosphorus Sulfur Silicon 0.030 max 21.0-23.0 2.00 max 2.50-3.50 0.08-0.20 4.50-6.50 0.030 max 0.020 max 1.00 max UNS S32205 Carbon Chromium Manganese Molybdenum Nitrogen Nickel Phosphorus Sulfur Silicon 0.030 max 22.0-23.0 2.00 max 3.00-3.50 0.14-0.20 4.50-6.50 0.030 max 0.020 max 1.00 max Trade Name UNS 6Moly Industry Specifications Chemical Composition Min.Tensile (KSI) Min.Yield (KSI) Elongation % SAF 2205 UNS S31803 ASME SA-182 (F51), SA-240, SA-798, SA-790, SA-815 ASTM A240, A276, A479, A789, A790, A815, A923, A928, A988 SAE J405 C 0.30 max Cr 21.0-23.0 Mn 2.00 max Mo 2.50-3.50 N 0.08-0.20 Ni 4.50-6.50 P 0.030 max S 0.020 max Si 1.00 max 90 65 25 SAF 2205 UNS S32205 ASTM A240, A240M, A276, A479, A480, A480M, A798, A7901, A815, A923, A928, A988 SAE J40 C 0.30 max Cr 22.0-23.0 Mn 2.00 max Mo 3.00-3.50 N 0.14-0.20 Ni 4.50-6.50 P 0.030 max S 0.020 max Si 1.00 max  90 65 25 General Duplex stainless steel information 2205 is the most widely used duplex (ferritic/austenitic) stainless steel grade. It finds applications due to both excellent corrosion resistance and high strength. The standard duplex S31803 composition has over the years been refined by many steel suppliers, and the resulting restricted composition range was endorsed as UNS S32205 in 1996. Duplex S32205 gives better guaranteed corrosion resistance, but for much of the Duplex S31803 currently produced also complies with Duplex S32205. 2205 is not generally suitable for use at temperatures above 300ºC as it suffers from precipitation of brittle micro-constituents, nor below -50ºC because of its ductile-to-brittle-transition. Duplex Applications Chemical processing, transport and storage, Oil and Gas exploration and processing equipment, Marine and other high chloride environments, Pulp and paper digesters, liquor tanks and paper machines. Duplex Corrosion Resistance Excellent general corrosion resistance; superior to Grade 316 in most environments. Excellent resistance to localized corrosion including intergranular, pitting and crevice corrosion; the CPT of 2205 is generally at least 35ºC. The grade is also resistant to chloride stress corrosion cracking (SCC) at temperatures of up to about 150ºC. Grade 2205 will often perform well in environments which cause premature failure of austenitic grades. It has better resistance to sea water then Grade 316. Duplex Heat Resistance Although 2205 has good high temperature oxidation resistance, this grade - like other duplex stainless steels - suffers from embrittlement if held for even short times at temperatures above 300ºC. If embrittled, this can only be rectified by a full solution annealing treatment. Duplex stainless steels are almost never used above 300ºC. Duplex Heat Treatment Duplex Heat Treatment Solution treatment (annealing) - heat to 1020ºC-1100ºC and cool rapidly. This grade cannot be hardened by thermal treatment, but does work harden. Source: Atlas Steels Australia