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 pipe Fittings (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 size 1/8″, 48″, class 150 to 6000 and type Buttweld to Cast. Standards include ASME B16.9, ASME B16.11, ASTM A403 / ASME SA-403, ASTM A182 / ASME SA-182, MSS SP-43, MSS SP-97, DIN 2605 and EN 10253. Finishes and conditions include Annealed and pickled, Polished, Mirror and Electropolished.
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.
Send the size, quantity and standard. We will confirm availability against stock and come back with price.
