1. Scope
This national standard specifies general technical delivery requirements of all steel and steel products included in GB/T 15574 except cast steel and sintered metal products.
When the provisions of the product standard or the agreement of the contract is inconsistent with the provisions of this standard, the requirements shall be based on the product standard and the contract agreement.
2. Normative references
The following standards contain provisions which, through reference in this text, constitute provisions of this Standard. At time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this Standard are encouraged to investigate the possibility of applying the most recent editions of the Standards indicated below.
GB/T 222-1984 Method of Sampling Steel for Determination of Chemical Composition and Permissible Variations for Product Analysis
GB/T 2975-1998 Steel and Steel Products--Location and Preparation of Test Pieces for Mechanical Testing
GB/T 13304-1991 Steels-Classification
GB/T 15574-1995 Steel Products Classification and Definitions
GB/T 19001-1994 Quality Systems--Model for Quality Assurance in Design, Development, Production, Installation and Servicing
GB/T 19002-1994 Quality Systems--Model for Quality Assurance in Production, Installation and Servicing
GB/T 19003-1994 Quality Systems--Model for Quality Assurance in Final Inspection and Test
YB/T 081-1996 Rule for Rounding Off of Numerical Values and Judgement of Testing Values for Technical Standards of Metallurgy
3. Definitions
Besides definitions specified in GB/T 13304 and GB/T 15574, this standard shall also adopt the following definitions:
3.1 Inspection
Inspection refers to the activity that determine, inspect, test and measure one or more of characteristic values of a sort of product or service, and make comparison with the specified value, so as to determine whether this activity is eligible.
3.2 Testing
GB/T 17505-1998 The following standards are cited：
