ASTM A312 TP321H Stainless Steel Seamless Pipe
321H, is a titanium stabilized austenitic stainless steel that is known for its general corrosion resistance. This higher carbon version of Type 321 stainless steel offers a wide variety of benefits including: Excellent resistance oxidation to 1500°F (816°C) Good low temperature toughness.
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Gnee Steel (Tianjin) Co., Ltd. is one of the most professional manufacturers and suppliers of astm a312 tp321h stainless steel seamless pipe in China. With abundant experience, we warmly welcome you to wholesale customized astm a312 tp321h stainless steel seamless pipe from our factory. For price consultation, contact us.
321H, is a titanium stabilized austenitic stainless steel that is known for its general corrosion resistance. This higher carbon version of Type 321 stainless steel offers a wide variety of benefits including: Excellent resistance oxidation to 1500°F (816°C) Good low temperature toughness.
Grade 321 is a titanium stabilized austenitic stainless steel with good general corrosion resistance. It has excellent resistance to intergranular corrosion after exposure to temperatures in the chromium carbide precipitation range of 800 – 1500°F (427 – 816°C). The grade resists oxidation to 1500°F (816°C) and has higher creep and stress rupture properties than grade 304 and 304L. It also possesses good low temperature toughness.
321H Stainless steel Pipe is a general purpose austenitic stainless steel that is stabilized against carbide precipitation and designed to work within the carbide precipitation temperature range 427 to 816°C (800 to 1500°F). It is non-magnetic in the annealed condition and can be hardened only by cold working. Titanium is added to the alloy's composition to suppress grain boundary chromium carbide precipitation and reduce susceptibility to intergranular corrosion.
321H Stainless steel Pipe is the higher carbon (0.04 - 0.10) version of the alloy. It was developed for enhanced creep resistance and for higher strength at temperatures above 1000oF (537°C). In most instances, the carbon content of the pipe enables dual certification.
ASTM A312 TP 321H STAINLESS STEEL PIPES CHEMICAL COMPOSITION
Typical compositional ranges for grade 321H stainless steels Pipes
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N | Other | |
| 321 | min. max |
– 0.08 |
2.00 | 0.75 | 0.045 | 0.030 | 17.0 19.0 |
– | 9.0 12.0 |
0.10 | Ti=5(C+N) 0.70 |
| 321H | min. max |
0.04 0.10 |
2.00 | 0.75 | 0.045 | 0.030 | 17.0 19.0 |
– | 9.0 12.0 |
– | Ti=4(C+N) 0.70 |
ASTM A312 TP 321H STAINLESS STEEL PIPES MECHANICAL PROPERTIES
Mechanical properties of 321H grade stainless steel
| Grade | Tensile Strength (MPa) min | Yield Strength 0.2% Proof (MPa) min | Elongation (% in 50mm) min | Hardness | |
| Rockwell B (HR B) max | Brinell (HB) max | ||||
| 321 | 515 | 205 | 40 | 95 | 217 |
| 321H | 515 | 205 | 40 | 95 | 217 |
| 321H also has a requirement for a grain size of ASTM No 7 or coarser. | |||||
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