良工閥門的工作溫度是良工閥門設計和材料選擇中必須考慮的問題之一。為了規范良工閥門主體材料的合適工作溫度，從各種良工閥門鋼合金的材料性能來看，應用于我國石化、化工、化肥、電力、冶金等行業，明確規定良工閥門主體材料的合適工作溫度及相關要求，用于良工閥門產品的設計、制造和檢驗。此外，考慮到技術管理、生產管理和材料采購，各種鋼材應選擇綜合性能好的鋼材，不要直接選擇過多的鋼材號碼，防止混亂。

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.

超低溫閥門[-254(液氫)~-1010°C(乙烯)]良工體不銹鋼、銅臺面心立方晶格熱處理后的低溫力學性能，尤其是低溫沖擊韌性，必須符合標準要求。下列良工體不銹鋼可用于制造超低溫良工閥門。ASTMA351CF8M、CF3M、ASTMA182F3和CF3、F316L、ASTMA4316F304和F304L、316L、304、304L和CF8D(蘭州高壓良工閥門廠設計，廠家設計，標準代號GFQ81-93)。液氮(196)必須是超低溫閥體、閥蓋、閘板或閥瓣的精加工?！鉉)在中間進行深冷處理。

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).

適用于低溫閥門(-100~-300)°C)低溫良工體不銹鋼及低溫承壓件鐵素體及馬氏體鋼是主要材料。ASTMA351CF8MMA、CF3M、ASTMA182F3和CF3、F316L、F304和.ASTMA43316F304L、316L、304、304L和CF8D.ASTMA352LCA-32L的鐵素體和馬氏體鋼*C)、LCB、LCC(-46°C)、LC1(-59°C)、LC2、LC211(-73*C)和LC3(-100°C)。ASTMA352標準中的初級材料較低，但在冶煉過程中，化學成分必須可靠、嚴格。其熱處理工藝復雜，為滿足標準要求的低溫沖擊韌性要求，需多次調質，生產周期長。

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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