Q/BQB 302-2014 Continuously hot-rolled steel sheet and strip for cold forming
1 Scope
This standard specifies the dimensions, shape, technical requirements, inspections and tests, packaging, marking and inspection documents of continuously hot-rolled steel sheet and strip for cold forming.
This standard is applicable to the continuously hot-rolled steel sheet and strip for cold forming as well as the steel sheet cut horizontally therewith and the slit wide strip cut vertically therewith (hereinafter referred to as steel sheet and strip) produced by Baoshan Iron & Steel Co., Ltd.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies.
GB/T 222-2006 Permissible tolerances for chemical composition of steel products
GB/T 223 Methods for chemical analysis of iron, steel and alloy
GB/T 228.1-2010 Metallic materials - Tensile testing - Part 1: Method of test at room temperature
GB/T 232-2010 Metallic materials - Bend test
GB/T 2975-1998 Steel and steel products - Location and preparation of samples and test pieces for mechanical testing
GB/T 4336-2002 Standard test method for spark discharge atomic emission spectrometric analysis of carbon and low - Alloy steel (Routine method)
GB/T 8170-2008 Rules of rounding off for numerical values & expression and judgment of limiting values
GB/T 20066-2006 Steel and iron - Sampling and preparation of samples for the determination of chemical composition
GB/T 20123-2006 Steel and iron - Determination of total carbon and sulfur content - Infrared absorption method after combustion in an induction furnace (routine method)
Q/BQB 300 General rules of package, mark and inspection document for continuously hot rolled steel sheet and strip
Q/BQB 301 Dimension, shape, weight and tolerance for continuously hot rolled steel sheet and strip
3 Classification and codes
3.1 The designation, nominal thickness, surface treatment method and application of steel sheet and strip are shown in Table 1.
3.2 By surface treatment method:
Pickled surface
Rolled surface
1 Scope
2 Normative references
3 Classification and codes
4 Ordering information
5 Dimension, shape, weight and permissible deviation
6 Technical requirements
7 Inspection and test
8 Packaging, marking and inspection documents
9 Rules of rounding off for numerical values
10 Annex
Annex A (Informative) Comparison between similar designations in this standard and relevant standards
