A duplex microstructure delivers what austenitics cannot: high strength and high chloride resistance at the same time. 2205 (S31803/S32205) is the workhorse; the super duplex grades 2507 (S32750) and Zeron-type S32760 push PREN above 40 for seawater and sour service. The strength advantage often allows a thinner wall, which recovers much of the cost premium on a large project.
Pitting resistance equivalent. Higher resists chlorides better.
Indexed to 304. Indicative, for specification triage.
Rajgranth Metal & Alloys manufactures, stocks, supplies and exports Duplex and Super Duplex Stainless Steel welded Tubes (UNS S31803 / S32205 / S32550 / S32750 / S32760) from Mumbai. Roughly equal austenite and ferrite. Around twice the yield strength of 316L. Rajgranth Metal & Alloys has been trading since 1980, is self-funded and debt-free, and despatches most orders from its Mumbai stockyard within two days.
A duplex microstructure delivers what austenitics cannot: high strength and high chloride resistance at the same time. 2205 (S31803/S32205) is the workhorse; the super duplex grades 2507 (S32750) and Zeron-type S32760 push PREN above 40 for seawater and sour service. The strength advantage often allows a thinner wall, which recovers much of the cost premium on a large project.
Duplex and Super Duplex Stainless Steel is also designated UNS S31803 / S32205 / S32550 / S32750 / S32760, EN 1.4462 / 1.4507 / 1.4501, AISI F51 / F60 / F53 / F55, JIS SUS329J3L, GB S22053 and Werkstoff X2CrNiMoN22-5-3 / X2CrNiMoCuWN25-7-4. Quote the designation your specification uses and we will supply to it.
Yield strength roughly double that of 316L, allowing thinner sections, Excellent resistance to chloride stress corrosion cracking, Super duplex PREN above 40 for seawater service and Good resistance to erosion and cavitation. It is partially, with requires-procedure weldability and difficult machinability, and is used in continuous service in air up to about 300 °C.
Hard upper service limit near 300 degrees C — 475 degrees C embrittlement, Welding requires controlled heat input to maintain phase balance, Ferromagnetic, which rules it out where magnetic permeability matters and Machining is demanding and tool wear is high. We state these plainly so the grade is chosen for the right service.
Our published range covers outside diameter 4.7, 76.2 (mm — larger sizes to order), wall thickness 0.5 to 3.0 (mm), length 5 m, 6.5 m (Customised per requirement) and tube ends Plain, Bevelled. Standards include ASTM A213 / ASME SA-213, ASTM A269, ASTM A312 / ASME SA-312, ASTM A376 / ASME SA-376, ASTM A789 / ASME SA-789, ASTM A790 / ASME SA-790, ASTM A268 / ASME SA-268, ASTM A511, ASTM B163 / ASME SB-163 and ASTM B407 / ASME SB-407. Finishes and conditions include Bright Annealed (CFA), Solution Annealed (CFD), Electro Polished (EP), Polished (APP), Annealed and Pickled (AP), Mirror Polish, Matt Polish and Cold Drawn.
offshore and subsea piping, seawater cooling and desalination, chemical tankers and cargo systems, sour gas service and pressure vessels where weight matters. Typical industries: oil & gas, marine & shipbuilding, chemical, petrochemical and power & energy. We supply across India and export to markets in the Middle East, Africa, Europe, Asia, North America and South America.
Material is supplied with documentation, tested in house across 18 listed testing facilities, and covered by our ISO 9001:2015 quality management system. Rajgranth Metal & Alloys has been trading since 1980, is self-funded and debt-free, and despatches most orders from its Mumbai stockyard within two days.
mm — larger sizes to order
mm
Customised per requirement
The full detail for this product as supplied from our Mumbai stockyard: sizes, grades, standards, tolerances, tests and applications.
Rajgranth Metals is a Prominent Manufacturers, Stockholders, Suppliers & Exporters of Stainless Steel Welded Tubes Duplex & Super Duplex in Mumbai, India.
Size x Thickness x Standard x Specification x Grade
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