GB/T 31943-2015Continuously cold rolled steel strips for precision welded tubes (English PDF)
精密焊接钢管用冷连轧钢带
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
September 11, 2015
Implementation date
June 1, 2016
Scope
GB/T 31943-2015 is the English-translated version of 精密焊接钢管用冷连轧钢带.
GB/T 31943-2015 is the Chinese standard "Continuously cold rolled steel strips for precision welded tubes".
Its scope clause reads: This standard specifies the precision welded steel tubes cold rolling steel grades and purposes, ordering the content, size, shape, weight and tolerances, Technical requirements, test methods, inspection rules, packaging, marking and quality certification.
This standard applies to the thickness of 0.25mm ~ 1.30mm cold rolling steel, mainly used in refrigeration, automotive, electric appliances and other industries Condenser, evaporator, fuel, lubricating oil pipes, electric pipes, coolers and other single and double precision tubes welded steel pipe.
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Document preview — GB/T 31943-2015
National Standard of the People's Republic of China
- ICS
- 77.140.50
- Classification
- H 46
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- 1 Scope
- 2 Normative references
- 3.1 grades representation
- 3.2 Purpose
1 Scope
This standard specifies the precision welded steel tubes cold rolling steel grades and purposes, ordering the content, size, shape, weight and tolerances,
Technical requirements, test methods, inspection rules, packaging, marking and quality certification.
This standard applies to the thickness of 0.25mm ~ 1.30mm cold rolling steel, mainly used in refrigeration, automotive, electric appliances and other industries
Condenser, evaporator, fuel, lubricating oil pipes, electric pipes, coolers and other single and double precision tubes welded steel pipe.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein
Member. For undated references, the latest edition (including any amendments) applies to this document.
GB/T 222 chemical composition of finished steel tolerance
GB/T 223.9 steel and aluminum alloys - Determination of chromium content Azure S Spectrophotometry
GB/T 223.59 Steel and Alloy Determination of phosphorus content by bismuth phosphomolybdate blue spectrophotometric method and antimony phosphomolybdate blue spectrophotometry
GB/T 223.63 Methods for chemical analysis of iron, steel and alloy The sodium (potassium) for Determination of amount
GB/T 223.64 steel and alloy manganese content - Flame Atomic Absorption Spectrometry
RT Test Method. Test Part 1 GB/T 228.1-2010 metal material tensile
General provisions GB/T 247 steel sheet and strip packaging, marking and quality certificate
Size GB/T 708 cold rolled steel sheet and strip, shape, weight and tolerance
GB/T 2523 cold-rolled steel sheet metal (strip) method for measuring surface roughness and peak number of
GB/T 2975 Steel and steel products for mechanical testing and sample preparation position
GB/T 4336 carbon steel and low alloy steel spark source atomic emission spectrometry method (conventional method)
GB/T 8170 repair value expressed about the rules and limit values and judgment
GB/T 17505 Steel and steel products General technical delivery requirements
GB/T 20066 Steel and iron - Sampling and determination of the chemical composition of the sample with a sample preparation method
GB/T 20123 Steel - Determination of total carbon and sulfur content of the high-frequency induction furnace combustion infrared absorption method (conventional method)
Inductively coupled plasma atomic GB/T 20125 low-alloy steel multi-element content Emission Spectrometry
Determination of GB/T 20126 non-alloy steel of low carbon content - Part 2. After the induction furnace (preheated) within the combustion infrared absorption method
Grades 3 and uses
3.1 grades representation
Welded steel grades by the first letter of the representative sequence number and composition. Where 1 single, 2 for a double.
Example. HG1 wherein.
HG --- "pipe" Pinyin initials;
1 --- single pipe with a strip.
3.2 Purpose
Strip By Application Table 1.
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
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