Stainless steel 321 (UNS S32109) is a type of Ni-Cr-Ti heat resistant steel used for high temperature environments up to 816 ℃. It offers excellent stress rupture and creep resistance performance than that of 304 stainless steel. 321H SS pipes are available in both seamless and welded form in various sizes. Stainless Steel 321/321H seamless & welded pipes and tubes can be offered in random lengths, varied types and various forms used in manufacturing heat exchangers, pressure vessels, pharmaceuticals and chemical processing equipment.
Specification:
Type: Seamless / Weld Pipe
Seamless pipe:1/2" NB - 16" NB
Weld pipe: 1/2" NB - 24" NB
Schedule: SCH 10 – SCH XXS
Equivalent Standards:
American | EN | Japanese | Chinese |
ASTM A276/ 213 / 249 / 269 / 312 / 358 | EN 10088-1 | JIS G4303 | GB/T 20878 |
Chemical composition:
Cr | Ni | C | Si | Mn | P | S | Ti | N |
18.0-20.0 | 9.0-12.0 | 0.04-1.0 | 0.75 | 2.0 | 0.045 | 0.03 | ≥5×C% | 0.10 |
Mechanical Properties:
Tensile Strength | Yield Strength 0.2% | Elongation - | Hardness |
75 | 30 | 40 | 217 |
Applications:
The addition of titanium makes 321H more suitable for high temperature applications, and 304 sensitization reaction and 304L high temperature strength insufficient applications. Typical applications include:
1. Oil exhaust gas combustion pipeline
2. Engine exhaust pipe, heat exchanger, heating furnace parts
4. Muffler for diesel engine
5. Boiler and pressure vessel
6. Expansion joint, thermal expansion joint
We supply and manufacture high quality 321H Heat resistant stainless steel pipes in accordance with EN, DIN, ASTM, GB standards, specified delivery conditions and final customer specifications for industrial and commercial applications. Special sizes of steel pipes and delivery issues can be further negotiated and we provide a wide range of solutions for purchasing departments to select alternative grades without specifying product specifications.