Standard No.:	GB 222-1984
Chinese Name:	钢的化学分析用试样取样法及成品化学成分允许偏差
English Name:	Method of sampling steel for determination of chemical composition and permissible variations for product analysis
Professional Classification:	H11 Steel and iron alloy analysis method
Professional Classification:	GB National Standard
ICS Classification:	77.080.20 Steel
Issued by:
Issued on:	1983-12-08
Implemented on:	1984-12-07
Status:	ABOLISHED
Replace:	GB222-1963
Target Language:	English
File Format:	PDF
Word Count:
Translation Price:	please email coc@codeofchina.com for quotation
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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