良工阀门的工作温度是良工阀门设计和材料选择中必须考虑的问题之一。为了规范良工阀门主体材料的合适工作温度，从各种良工阀门钢合金的材料性能来看，应用于我国石化、化工、化肥、电力、冶金等行业，明确规定良工阀门主体材料的合适工作温度及相关要求，用于良工阀门产品的设计、制造和检验。此外，考虑到技术管理、生产管理和材料采购，各种钢材应选择综合性能好的钢材，不要直接选择过多的钢材号码，防止混乱。

The working temperature of Lianggong valves is one of the issues that must be considered in the design and material selection of Lianggong valves. In order to standardize the suitable working temperature of the main material of Lianggong valves, from the perspective of the material properties of various Lianggong valve steel alloys, they are applied in industries such as petrochemical, chemical, fertilizer, electric power, metallurgy, etc. in China. The appropriate working temperature and related requirements for the main material of Lianggong valves are clearly specified for the design, manufacturing, and inspection of Lianggong valve products. In addition, considering technical management, production management, and material procurement, various types of steel should be selected with good comprehensive performance, and excessive steel numbers should not be directly selected to prevent confusion.

超低温阀门[-254(液氢)~-1010°C(乙烯)]良工体不锈钢、铜台面心立方晶格热处理后的低温力学性能，尤其是低温冲击韧性，必须符合标准要求。下列良工体不锈钢可用于制造超低温良工阀门。ASTMA351CF8M、CF3M、ASTMA182F3和CF3、F316L、ASTMA4316F304和F304L、316L、304、304L和CF8D(兰州高压良工阀门厂设计，厂家设计，标准代号GFQ81-93)。液氮(196)必须是超低温阀体、阀盖、闸板或阀瓣的精加工。°C)在中间进行深冷处理。

The low-temperature mechanical properties, especially the low-temperature impact toughness, of the ultra-low temperature valve [-254 (liquid hydrogen)~-1010 ° C (ethylene)] made of high-quality stainless steel and copper countertop centered cubic lattice after heat treatment must meet the standard requirements. The following high-quality stainless steel can be used to manufacture ultra-low temperature high-quality valves. ASTMA351CF8M, CF3M, ASTMA182F3 and CF3, F316L, ASTMA4316F304 and F304L, 316L, 304, 304L and CF8D (designed by Lanzhou High Pressure Lianggong Valve Factory, manufacturer, standard code GFQ81-93). Liquid nitrogen (196) must be precision machined for ultra-low temperature valve bodies, valve covers, gates or discs. Perform cryogenic treatment in the middle (° C).

适用于低温阀门(-100~-300)°C)低温良工体不锈钢及低温承压件铁素体及马氏体钢是主要材料。ASTMA351CF8MMA、CF3M、ASTMA182F3和CF3、F316L、F304和.ASTMA43316F304L、316L、304、304L和CF8D.ASTMA352LCA-32L的铁素体和马氏体钢*C)、LCB、LCC(-46°C)、LC1(-59°C)、LC2、LC211(-73*C)和LC3(-100°C)。ASTMA352标准中的初级材料较低，但在冶炼过程中，化学成分必须可靠、严格。其热处理工艺复杂，为满足标准要求的低温冲击韧性要求，需多次调质，生产周期长。

Suitable for low-temperature valves (-100~-300) ° C). Low temperature austenitic stainless steel and low-temperature pressure parts, ferrite and martensitic steel are the main materials. ASTMA351CF8MMA, CF3M, ASTMA182F3 and CF3, F316L, F304 and ASTMA43316F304L, 316L, 304, 304L, and CF8D ASTMA352LCA-32L ferritic and martensitic steel * C, LCB, LCC (-46 ° C), LC1 (-59 ° C), LC2, LC211 (-73 * C), and LC3 (-100 ° C). The primary materials in the ASTMA352 standard are relatively low, but during the smelting process, the chemical composition must be reliable and strict. Its heat treatment process is complex, and in order to meet the low-temperature impact toughness requirements of the standard, multiple quenching and tempering are required, resulting in a long production cycle.

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