Introduction
321 stainless steel, Ni-Cr-Mo-type austenitic stainless steel, its performance with a 304 stainless steel plate is very similar, but due to the addition of titanium, it has a better intergranular corrosion resistance and high temperature strength. The addition of titanium to make it effective control of the formation of chromium carbide .

321 stainless steel with Ti as a stabilizing element exists, but it is the creep strength of steel at high temperatures much better than 316L.

Technical Parameter

321 stainless steel
Standard	Grade	Chemical Composition %	Technique	Yied strength Mpa	Tensile strength Mpa	Elongation %	Hardness
GB	1Cr18Ni9Ti	C≤0.08，Mn≤2.00， Si≤0.75，P≤0.045， S≤0.0.30，Cr 17.0~19.0, Ni 9.0~12.0，N≤0.10， Ti〔5x﹙C+N﹚〕~0.70	hot /cold rolled	≥205	≥518	≥40	HV≤200
USA	321
JIS	SUS321
German	1.4541

Application
321: High inter-granular corrosion resistance of chemical, coal, oil field open machine, heat treatment difficulties of building heat-resistant parts
1. Oil and gas burning pipeline
2. Engine exhaust pipe
3. Shell of the boiler, heat exchangers, heating furnace part
4. Silencer for diesel parts
5. Boilers and pressure vessels
6. Chemical transportation vehicle
7. Expansion joint
8. Furnace pipes and drying machines for spiral welded pipe