321 Steel Pipe Specification
| Standard | 321 - ASTM /ASME A/SA 213 / 249 / 269 / 312 / 358 CL. I to V 321H - ASTM /ASME A/SA 213 / 249/ 269 / 312 / 358 CL. I to V |
|---|---|
| SEAMLESS 321/321H Pipes & Tubes | 1/2" NB - 16" NB |
| ERW 321/321HPipes & Tubes | 1/2" NB - 24" NB |
| EFW 321/321H Pipes & Tubes | 6" NB - 100" NB |
| Certifications | IBR AND NON IBR |
| Schedule | SCH 10 – SCH XXS |
| Type | Seamless / ERW / EFW/ Fabricated / LSAW Pipes |
| Form | Round, Square, Rectangular, Hydraulic Etc |
| Length | Single Random, Double Random & Cut Length. |
| End | Plain End, Beveled End, Threaded |
| Application | Aerospace – piston engine manifolds, Chemical Processing, Expansion Joints, Food Processing – equipment and storage, Petroleum Refining – polythionic acid service, Waste Treatment – thermal oxidizers |
321 Stainless Steel Pipe Sizes
| 1/8" IPS(.405" O.D.) | 3 1/2" IPS( 4.000" O.D.) |
|---|---|
| SCH 40, 80 | SCH 10, 40, 80, 160, XXH |
| 1/4" IPS(.540" O.D.) | 4" IPS(4.500" O.D.) |
| SCH 10, 40, 80 | SCH 10, 40, 80, 160, XXH |
| 3/8" IPS(.675" O.D.) | 5" IPS( 5.563" O.D.) |
| SCH 10, 40, 80 | SCH 10, 40, 80, 160, XXH |
| 1/2" IPS(.840" O.D.) | 6" IPS(6.625" O.D.) |
| SCH 5, 10, 40, 80, 160, XXH | SCH 5, 10, 40, 80, 120, 160, XXH |
| 3/4" IPS(1.050" O.D.) | 8 ” IPS(8.625" O.D.) |
| SCH 10, 40, 80, 160, XXH | SCH 5, 10, 40, 80, 120, 160, XXH |
| 1" IPS:(1.315′ O.D.) | 10" IPS(10.750" O.D.) |
| SCH 5, 10, 40, 80, 160, XXH | SCH 10, 20, 40, 80 (.500), TRUE 80(.500) |
| 1-1/4" IPS(1.660" O.D.) | 12" IPS(12.750" O.D.) |
| SCH 10, 40, 80, 160, XXH | SCH 10, 20, 40(.375), TRUE40(.406), SCH80(.500) |
| 1-1/2" IPS(1.900" O.D.) | 14" IPS(14.000" O.D.) |
| SCH 10, 40, 80, 160, XXH | SCH10 (.188), SCH40 (.375) |
| 2" IPS(2.375" O.D.) | 16" IPS(16.000" O.D.) |
| SCH 10, 40, 80, 160, XXH | SCH10(.188), SCH40(.375) |
| 2 1/2" IPS(2.875" O.D.) | 18" IPS (18.000" O.D.) |
| SCH 10, 40, 80, 160, XXH | SCH-40 (.375) |
| 3" IPS( 3.500" O.D.) | |
| SCH 5, 10, 40, 80, 160, XXH |
Chemical Composition
| Gr | Cr | Ni | C | Si | Mn | P | S | N | Ti | Fe |
|---|---|---|---|---|---|---|---|---|---|---|
| 321 | min:17.0 max:19.0 |
min: 9.0 max:12.0 |
max:0.08 | max:0.75 | max:2.0 | max:0.045 | max:0.03 | max:0.10 | min:5*(C+N) max:0.70 |
Balance |
| 321H | min:17.0 max:19.0 |
min: 9.0 max:12.0 |
min:0.04 max:0.10 |
min:18.0 max:20.0 |
max:2.0 | max:0.045 | max:0.03 | max:0.10 | min:5*(C+N) max:0.70 |
Balance |
Mechanical Properties
| Grade | Tensile Strength ksi (min.) |
Yield Strength 0.2% Offset ksi (min.) |
Elongation - % in 50 mm (min.) |
Hardness (Brinell) MAX |
|---|---|---|---|---|
| 321/321H | 75 | 30 | 40 | 217 |
Physical Properties
| Denstiy lbm/in3 |
Coefficient of Thermal Expansion (min/in)-°F |
Thermal Conductivity BTU/hr-ft-°F | Specific Heat BTU/lbm -°F | Modules of Elasticity (annealed)2-psi | |
|---|---|---|---|---|---|
| at 68 °F | at 68 – 212°F | at 68 – 1832°F | at 200°F | at 32 – 212°F | in tension (E) |
| 0.286 | 9.2 | 20.5 | 9.3 | 0.12 | 28 x 106 |
Available Stainless Steel Pipes
- Stainless Steel Pipes
- Stainless Steel 304 Pipes
- Stainless Steel 316 Pipes
- Stainless Steel 321 Pipes
- Stainless Steel 347 Pipes
Industries We Serve
Chemical Research Industries
Petroleum and Gas Industries
Agriculture Engineering Industries
Mechanical Engineering Industries
Civil Engineering Industries