321 stainless steel (UNS S32100) is a titanium stabilized austenitic stainless steel that features improved resistance to intergranular corrosion. This grade is suitable for high-temperature applications up to 1500°F (815°C), where the addition of titanium stabilizes the material against chromium carbide formation. Since titanium has a stronger affinity for carbon than chromium, titanium carbide precipitates within the grain instead of forming at the grain boundaries. While corrosion resistance is similar to 304 and 304L in the annealed condition, it features higher creep and stress rupture properties. These properties make it ideal for pressure vessels and boiler applications. 321 stainless steel is non-magnetic and heat resistant for continuous service at elevated temperatures.
Chemical Properties
| ASTM | C% | Mn% | P% | S% | Si% | Cr% | Ni% | Mo% |
| 321 | ≤0.08 | ≤2.00 | ≤0.045 | ≤0.03 | ≤0.75 | 17.0-19.0 | 9.0-12.0 | - |
Material Properties
| Type No. | Tensile Strength, ksi | Yield Strength, ksi | Elongation in 2 inches, % | Reduction of Area, % | Brinell Hardness |
| 321 | 85 | 35 | 55 | 65 | 150 |
Packing And Shipping
Standard export packing for stainless steel sheet：
● Surface polish
● Bundle package
● Wooden case,wooden pallet package
● Container or bulk
● Special according to customer's request
321 stainless steel | |||||||
Standard | Grade | Chemical Composition % | Temper | 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 | ||||||
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
