ASTM规范A240中列出了标准类型锻造不锈钢的化学成分。UNS 20000系列指定了耐腐蚀的镍铬锰类型，通过热处理不可硬化。UNS 30000系列是耐腐蚀的镍铬钢，通过热处理不可硬化。然而，UNS 40000包括可硬化马氏体铬钢和不可硬化铁素体铬钢。建议参考SAE J412，了解此类材料的一般信息和使用方法。见表1。

The chemical composition of standard types of wrought stainless steels are listed in ASTM Specification A240. The UNS 20000 series designates nickel-chromium manganese, corrosion resistant types that are nonhardenable by thermal treatment. The UNS 30000 series are nickel-chromium, corrosion resistant steels, nonhardenable by thermal treatment. The UNS 40000 however, includes both a hardenable, martensitic chromium steel and nonhardenable, ferritic, chromium steel. Reference to SAE J412 is suggested for general information and usage of these types of materials. See Table 1.