标准编号:	GB 222-1984
中文名称:	钢的化学分析用试样取样法及成品化学成分允许偏差
英文名称:	Method of sampling steel for determination of chemical composition and permissible variations for product analysis
中标分类:	H11    钢铁与铁合金分析方法
行业分类:	GB    国家标准
ICS分类:	77.080.20 77.080.20    钢 77.080.20
发布机构:	中国钢铁工业协会
发布日期:	1983-12-08
实施日期:	1984-12-7
标准状态:	superseded
被新标准替代:	GB/T 222-2006 钢的成品化学成分允许偏差 GB/T 20066-2006 钢和铁化学成分测定用试样的取样和制样方法
被替代日期:	2006-8-1
替代旧标准:	GB 222-1963
翻译语言:	英文
文件格式:	PDF

1 Terms 1.1 Melting analysis Melting analysis refers to taking sample ingot during pouring molten steel and then making it into sample for chemical analysis. The analysis result represents the average chemical composition of the same furnace or tank of molten steel. 1.2 Product analysis Product analysis refers to taking sample from the processed finished steel (including steel billet) for chemical analysis. Product analysis is mainly used for checking the chemical composition, so it is also known as check analysis. As a result of uneven distribution (segregation) of element produced in the crystallization process of molten steel, the value of product analysis is different from that of melting analysis. 1.3 Permissible variation for product analysis Permissible variation for product analysis refers to that the value of melting analysis is within the standard scope but the value of product analysis may beyond the standard composition scope due to the element segregation in steel. A specified permissible value beyond this scope is namely the permissible variation for product analysis. 2 Sampling General