ASTM A312 TP321 Titanium Stabilized Stainless Steel Seamless Pipe Annealed SCH40 for High Temperature Service
ASTM A312 TP321 is a titanium stabilized austenitic stainless steel seamless pipe. The titanium addition stabilizes the carbon and prevents chromium carbide precipitation at grain boundaries, giving the pipe excellent resistance to intergranular corrosion after exposure to elevated temperatures.
TP321 pipe is a popular choice for high temperature service up to about 900°C, combining the corrosion performance of 304 with improved high temperature stability for heat exchangers and furnace equipment.
| Element | ASTM A312 TP321 (%) |
|---|---|
| Carbon (C) | 0.08 max |
| Silicon (Si) | 0.75 max |
| Manganese (Mn) | 2.00 max |
| Phosphorus (P) | 0.045 max |
| Sulfur (S) | 0.030 max |
| Chromium (Cr) | 17.0 - 19.0 |
| Nickel (Ni) | 9.0 - 12.0 |
| Titanium (Ti) | 5 x C min |
| Nitrogen (N) | 0.10 max |
| Property | Unit | Value |
|---|---|---|
| Tensile Strength, min. | MPa (ksi) | 515 (75) |
| Yield Strength (0.2% offset), min. | MPa (ksi) | 205 (30) |
| Elongation in 2 in. or 50 mm, min. | % | 35 |
| Hardness, max. | HRB | 90 |
- Heat exchangers and condensers in high temperature service
- Boiler and superheater tube systems
- Aircraft and engine exhaust components
- High temperature chemical process piping
- Expansion joints, bellows and furnace parts
- Petroleum refining and petrochemical equipment
For ASTM A312 TP321 stainless steel pipe, please send us your required size (OD x WT), schedule, surface finish and quantity. Our team replies within 24 hours with a competitive quotation and full mill test certificates.
zhongcheng@metalsstainlesssteel.com
ASTM A312 / ASME SA312
Seamless & Welded
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