321 stainless steel with Ti which exists as a stabilizing element ,
but it is also hot steel, in terms of high temperature is better
than 316L, 321 stainless steel at different concentration and
different temperature of organic acid and inorganic acid,
especially in oxidizing medium has good abrasion resistance, Used
in the manufacture of wear-resistant acid container and
wear-resisting lining equipment and pipelines.
Type 321 stainless steel is Ni - Cr - Ti austenitic stainless
steel, its performance is very similar with 304, but due to join
the metal titanium, making it has better resistance to
intercrystalline corrosion resistance and high temperature
strength. Due to add metal titanium, making them effective control
the formation of chromium carbide.
321 stainless steel has excellent high temperature stress rupture
and high temperature creep resistance,stress mechanical properties are
better than 304 stainless steel.
Applied to high grain boundary corrosion resistance requirements of
chemical industry, coal, oil field the outdoor machine,building materials heat-resistant parts and heat treatment are
1 .Oil combustion exhaust pipe
2 . engine exhaust pipe
3 . Boiler enclosure, heat exchanger, heating components
4 . Deadened the noise of diesel engine parts
5 . Boiler and Pressure Vessels
6 . Chemical transport vehicle
7 . Expansion joint
8 . Burning furnace pipe and dryers with spiral welded pipe
Tensile Strengthσb (MPa)：≥520
Yield Strengthσ0.2 (MPa)：≥205
Elongation Rate δ5 (%)：≥40
Percentage reduction of areaψ (%)：≥50
Heat Treatment Regime And Metallographic Structure
Heat treatment regime：1)Solid solution920～1150℃rapid cooling; 2)Stabilizing treatment can be performed according to the buyer's
requirement,Heat treatment temperature850～930℃,But it must be indicated in the contract.3）Solid solution temperature cannot exceed1066℃,more than words, stabilizing treatment, must be conducted to prevent
the precipitation of chromium.
●Delivery status：General with heat treatment state delivery, its heat treatment type
indicated in the contract; Not specified, the press is not heat
treatment state delivery.