Titanium is added at roughly five times the carbon content so it ties up carbon as titanium carbide before chromium can, which prevents intergranular attack after prolonged exposure in the sensitising range. That makes 321 the grade for welded assemblies that then operate hot — exhaust systems, expansion joints, refinery heaters. The H variant carries a controlled higher carbon for creep strength.
Pitting resistance equivalent. Higher resists chlorides better.
Indexed to 304. Indicative, for specification triage.
Rajgranth Metal & Alloys manufactures, stocks, supplies and exports Stainless Steel 321 and 321H welded Tubes (UNS S32100 / S32109) from Mumbai. 304 stabilised with titanium. Resists sensitisation in the 425–815 degrees C range. 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.
Titanium is added at roughly five times the carbon content so it ties up carbon as titanium carbide before chromium can, which prevents intergranular attack after prolonged exposure in the sensitising range. That makes 321 the grade for welded assemblies that then operate hot — exhaust systems, expansion joints, refinery heaters. The H variant carries a controlled higher carbon for creep strength.
Stainless Steel 321 and 321H is also designated UNS S32100 / S32109, EN 1.4541 / 1.4940, AISI 321 / 321H, JIS SUS321 / SUS321H, GB S32168 / S32169 and Werkstoff X6CrNiTi18-10 / X7CrNiTi18-10. Quote the designation your specification uses and we will supply to it.
Resists intergranular corrosion after high-temperature exposure, Better creep and stress rupture strength than 304 and Suited to cyclic heating without post-weld annealing. It is non-magnetic, with excellent weldability and fair machinability, and is used in continuous service in air up to about 900 °C.
No better than 304 against chlorides — the titanium does nothing for pitting, Titanium carbide stringers can affect surface finish on polished work and Less readily available in thin sheet than 304 or 316. 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.
exhaust manifolds and expansion joints, refinery heater and furnace components, aircraft and aerospace piping and high-temperature process vessels. Typical industries: aerospace, refinery, power & energy, automotive and chemical. 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 renown Manufacturers, Stockholders, Exporters & Suppliers of 321 Stainless Steel Welded Tubes in Mumbai, India
Size x Thickness x Standard x Specification x Grade
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