321/321H Coiled Stainless Steel Tubing
Grade: 321/321H
Coiled: 4mm*0.3mm-32mm*3mm
Standard: ASTM A312, ASTM A213 etc.
Surface: No.1(Pickling), Bright(Polished)
- Fast Shipping / Ready Stock
- ISO 9001 Direct Factory
- Custom Cutting & Processing
- 100% MTC & SGS Inspection Supported
321 Stainless Steel Pipe is a titanium-stabilized austenitic stainless steel designed for improved resistance to intergranular corrosion after exposure to elevated temperatures. It maintains good oxidation resistance, weldability, and mechanical strength at temperature. 321 pipe is commonly used in thermal processing, aerospace, chemical, petrochemical, exhaust, and high-temperature piping systems where conventional 304 stainless steel may experience sensitization.
Chemical Composition
| Element | Content (wt. %) |
| C | ≤0.080 |
| Si | ≤1.00 |
| Mn | ≤2.00 |
| P | ≤0.045 |
| S | ≤0.030 |
| Cr | 17.0–19.0 |
| Ni | 9.0–12.0 |
| Mo | — |
| N | ≤0.10 |
| Other | Ti: 5×C min., 0.70 max.; Fe: Balance |
Mechanical Properties
| Condition | Tensile Strength | Yield Strength (0.2%) | Elongation | Hardness |
| Solution annealed | ≥515 | ≥205 | ≥35 | ≤217 HB / ≤95 HRB |
- High-temperature piping
- Aerospace components
- Petrochemical equipment
- Heat exchangers
- Thermal processing equipment
- Engine and exhaust systems
321 Stainless Steel Pipe is a titanium-stabilized austenitic stainless steel designed for improved resistance to intergranular corrosion after exposure to elevated temperatures. It maintains good oxidation resistance, weldability, and mechanical strength at temperature. 321 pipe is commonly used in thermal processing, aerospace, chemical, petrochemical, exhaust, and high-temperature piping systems where conventional 304 stainless steel may experience sensitization.
Chemical Composition
| Element | Content (wt. %) |
| C | ≤0.080 |
| Si | ≤1.00 |
| Mn | ≤2.00 |
| P | ≤0.045 |
| S | ≤0.030 |
| Cr | 17.0–19.0 |
| Ni | 9.0–12.0 |
| Mo | — |
| N | ≤0.10 |
| Other | Ti: 5×C min., 0.70 max.; Fe: Balance |
Mechanical Properties
| Condition | Tensile Strength | Yield Strength (0.2%) | Elongation | Hardness |
| Solution annealed | ≥515 | ≥205 | ≥35 | ≤217 HB / ≤95 HRB |
- High-temperature piping
- Aerospace components
- Petrochemical equipment
- Heat exchangers
- Thermal processing equipment
- Engine and exhaust systems
