標準編號:	GB/T 20878-2007
中文名稱:	不銹鋼和耐熱鋼 牌號及化學成分
英文名稱:	Stainless and heat-resisting steels—Designation and chemical composition
中標分類:	H40    鋼鐵產品綜合
行業分類:	GB    國家標準
ICS分類:	77.140.20 77.140.20    不銹鋼 77.140.20
發布機構:	國家標準化委員會 國家質量監督檢驗檢疫總局
發布日期:	2007-4-25
實施日期:	2007-10-1
標準狀態:	superseded
被新標準替代:	GB/T 20878-2024 不銹鋼 牌號及化學成分
被替代日期:	2025-2-1
替代舊標準:	GB/T 4229-1984 不銹鋼板重量計算方法
翻譯語言:	英文
文件格式:	PDF
中文字符數:	16000 字
翻譯價格(元):	290.0
交付時間:	付款后 1 個工作日

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.