Cold rolled low carbon steel sheets and strips for vitreous enamelling
1 Scope
This standard specifies the classification and code, dimension, shape, weight, technical requirements, inspection and test, packaging, marking and quality certificate of cold rolled low carbon steel sheets and strips for vitreous enamelling.
This standard is applicable to cold rolled low carbon steel sheets and strips in rolled widths equal to or over 600 mm and in thicknesses of 0.30 mm~3.0 mm for civil enameling or industrial enameling (hereinafter referred to as steel sheets and strips).
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments (excluding corrections), or revisions, of any of these publications do not apply to this standard. However parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies.
GB/T 222 Permissible tolerances for chemical composition of steel products
GB/T 223.9 Iron, steel and alloy - Determination of aluminium content - Chrome azurol S photometric method
GB/T 223.16 Methods for chemical analysis of iron, steel and alloy - The chromotropic acid photometric method for the determination of titanium content
GB/T 223.17 Methods for chemical analysis of iron, steel and alloy - The diantipyrylmethane photometric method for the determination of titanium content
GB/T 223.40 Iron, steel and alloy - Determination of niobium content by the sulphochlorophenol S spectrophotometric method
GB/T 223.59 Iron, steel and alloy - Determination of phosphorus content - Bismuth phosphomolybdate blue spectrophotometric method and antimony phosphomolybdate blue spectrophotometric method
GB/T 223.63 Methods for chemical analysis of iron, steel and alloy - The sodium (potassium) periodate photometric method for the determination of manganese content
GB/T 223.64 Iron steel and alloyed - Determination of manganese content - Flame atomic absorption spectrometric method
GB/T 228 Metallic materials - Tensile testing at ambient temperature (GB/T 228-2002; eqv ISO 6892: 1998)
GB/T 247 General rule of package, mark and certification for steel plates (sheets) and strips
GB/T 708 Dimension, shape, weight and tolerance for cold-rolled steel plates and sheets
GB/T 2523 Cold rolled sheet (strip) - Measuring method for surface roughness
GB/T 2975 Steel and steel products - Location and preparation of samples and test pieces for mechanical testing (GB/T 2975-1998; eqv ISO 377: 1997)
GB/T 4336 Standard test method for spark discharge atomic emission spectrometric analysis of carbon and low-alloy steel (routine method)
GB/T 5027 Metallic materials - Sheet and strip - Determination of plastic strain ratio (r-values) (GB/T 5027-2007; ISO 10113: 2006, IDT)
GB/T 5028 Metallic Materials - Sheet and Strip - Determination of tensile strain hardening exponent( n-values) (GB/T 5028-2008; ISO 10275: 2007, MOD)
GB/T 17505 Steel and steel products - General technical delivery requirements (GB/T 17505-1998; eqv ISO 404: 1992)
GB/T 20066 Steel and iron - Sampling and preparation of samples for the determination of chemical composition (GB/T 20066-2006; ISO 14284: 1996, IDT)
GB/T 20123 Steel and iron - Determination of total carbon and sulfur content - Infrared absorption method after combustion in an induction furnace (routine method)
GB/T 20125 Low-alloy steel - Determination of multi-element contents - Inductively coupled plasma atomic emission spectrometric method
GB/T 20126 Unalloyed steel - Determination of low carbon content - Part 2: Infrared absorption method after combustion in an induction furnace (with preheating)
YB/T 081 Rule for rounding off of numberical values and judgement of testing values for technical standards of metallurgy
3 Classification and code
3.1 Naming method of designation
The designation of steel sheets and strips is composed of four parts, the first part is letter D, representing steel sheets and strips for cold forming; the second part is letter C, representing the cold rolled condition; the third part is a two-digit serial No., i.e. 01, 03 and 05, etc., representing the punch forming grade; and the fourth part is the code of processing type of enamelling.
Foreword i
1 Scope
2 Normative references
3 Classification and code
4 Dimension, shape, weight and tolerance
5 Ordering information
6 Technical requirements
7 Inspection and test
8 Packaging, marking and quality certificate
9 Rounding off of numerical values
10 Comparison of designations in this standard and those in foreign standards
Annex A (Informative) Comparison between similar designations in this standard and relevant standards
