UNS S31009 Seamless Pipes
310H (UNS S31009) belongs to the American standard austenitic heat-resistant steel. The carbon content of 310H stainless steel (UNS S31009) is limited to the lower limit of the range excluding 310. This makes 310H the first choice for high temperature applications. This steel has good oxidation resistance in intermittent use at temperatures up to 1040°C (1904°F) and continuous use at temperatures up to 1150°C (2102°F). Widely used in environments where sulfur dioxide gas is present, however, due to carbide precipitation, continuous use of this steel in the range of 425-860°C (797-1580°F) is not recommended.
Acid-resistant 310H stainless steel pipe has good corrosion resistance, and the high chromium content designed to improve high-temperature performance also gives this grade good resistance to water-based corrosion. Under high temperature conditions, 310H steel pipe has good resistance to oxidation and carburizing atmosphere. It is prone to σ phase embrittlement in the temperature range of 650-900°C. Grade 310H is typically used for temperatures starting at about 800 or 900°C, higher than the temperatures at which 304H and 321 are effective.
310H Stainless Steel Clad Pipe is mainly used in heat treatment industry and chemical industry, rollers, burner parts, oven linings, pipe hangers, conveyor belts, refractory supports, containers for hot concentrated acid or ammonia and sulfur dioxide.
Stainless Steel UNS S31009 Pipes Equivalent Grades
| Grade | 310H | |
| UNS No | S31009 | |
| Old British | BS | – |
| En | – | |
| Euronorm | No | – |
| Name | – | |
| Swedish SS | – | |
| Japanese JIS | SUS 310H | |
S31009 UNS Pipes Chemical Composition
| Grade | UNS S31009 | |
|---|---|---|
| min | max | |
| C | 0.04 | 0.10 |
| Mn | – | 2.0 |
| Si | – | 1.00 |
| P | – | 0.045 |
| S | – | 0.03 |
| Cr | 24.0 | 26.0 |
| Mo | – | – |
| Ni | 19.0 | 21.0 |
| N | – | – |
SS UNS S31009 Seamless Pipes
Seamless pipe made of SS 310H generally conforms to ASTM A312 (Standard Specification for Seamless, Welded, and Re-cold-Worked Austenitic Stainless Steel Pipe) and ASTM A213 (Seamless Ferritic and Austenitic Alloy Steel Boilers, Superheaters, and Pipe standards).
GNEE company currently has more than 50,000 tons of inventory, with many varieties for you to choose from! Alloy steel, plates, profiles, pipes, etc. Can implement GB, ASTM, JIS, DIN and other standards. The company has established long-term cooperative relationships with well-known domestic steel plants such as Chengdu Iron and Steel Group, Metallurgical Group, Baotou Steel Group, Baosteel Group, Anshan Iron and Steel Group, Tianjin Seamless, and Northeast Special Steel.
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