标准编号:	GB/T 20878-2007
中文名称:	不锈钢和耐热钢 牌号及化学成分
英文名称:	Stainless and heat-resisting steels—Designation and chemical composition
中标分类:	H40    钢铁产品综合
行业分类:	GB    国家标准
ICS分类:	77.140.20 77.140.20    不锈钢 77.140.20
发布机构:	国家标准化委员会 国家质量监督检验检疫总局
发布日期:	2007-4-25
实施日期:	2007-10-1
标准状态:	to be superseded
被新标准替代:	GB/T 20878-2024 不锈钢 牌号及化学成分
被替代日期:	2025-2-1
替代旧标准:	GB/T 4229-1984 不锈钢板重量计算方法
翻译语言:	英文
文件格式:	PDF
中文字符数:	16000 字
翻译价格(元):	290.0
交付时间:	付款后 1 个工作日

1. Scope This national standard specifies designation and its chemical constitution of stainless steel and heat resisting steel (see Table 1 ~ table 5). physical parameter of some designations, overseas standards designation or approximate designation parallel table, stainless steel and heat resisting steel designation criterion of acceptability are stipulated in the Informative Annex. Chemical constitution liminal value and its designation time stipulated in this standard is applicable to formulate and its revise product standard for stainless steel and its refractory steel (including steel ingot and its half-finished product). 2. Terminology and definition The following terminology and definition are is applicable to this standard. 2.1 Stainless steel Stainless steel does not rust and corrosion-resistant. Chromium content is at least 10.5%; carbon content is at maximum 1.2%. 2.1.1 Austenitic grade stainless steel Base is with face-centered cubic crystal austenite structure (gamma phase), antimagnetic. This kind of stainless steel is intensified (may cause magnetism) through cold-working. 2.1.2 Austenitic-ferritic (duplex) grade stainless steel Base is with austenite and ferrite (one with less phrase is more than 15%). the stainless steel is with magnetic property and can be intensified through cold-working. 2.1.3 Ferritic grade stainless steel Base is with space centered cubic lattice iron chain tissue (alpha phase) and with magnetic property. It cannot be hardened through heat treatment, but cold-working can lightly intensify it. 2.1.4 Martensitie grade stainless steel The base is the magnetic martensitic structure. Through heat treatment, mechanical property can be adjusted.