Commonly used materials cryogenic safety valve brief

Suitable for cryogenic Gas Heater Control Valve (-100 ~ -30 ℃) of the host material has a low temperature and low pressure parts of austenitic stainless steel ferritic and martensitic steels. Low-temperature austenitic stainless steel have ASTM A351 CF8M, CF3M, CF8 and CF3, ASTM A182 F316, F316L, F304 and F304L, ASTM A433 316,316L, 304,304L and CF8D. Low pressure parts ferritic and martensitic steels have ASTMA352LCA (-32 ℃), LCB, LCC (-46 ℃), LC1 (-59 ℃), LC2, LC211 (-73 ℃) and LC3 (-100 ℃). ASTMA352 standard primary lower material prices, but its chemical composition smelting must have a reliable and require very strict internal control standards plants. Heat treatment process is complex, requiring multiple for quenching, so as to achieve low-temperature impact toughness requirements of the standard requirements, long production cycle. Low temperature impact toughness can not reach the standard, it does not allow for feeding cold steel.
Therefore, only the production volume, and can become a smelting furnace when used, and in general, the choice of austenitic stainless steel.