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GB/T 708-1988 English PDF (GBT708-1988)

GB/T 708-1988 English PDF (GBT708-1988)

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GB/T 708-1988: Dimensions shape weight and tolerances for cold-rolled plates and sheets
This Standard applies to cold-rolled plates of which the width exceeds or equals to 600 mm, thickness is 0.2 ~ 5mm, and cold-rolled sheets of which the thickness exceeds 3 mm. It is not applicable to narrow strips of which the direct rolling width is less than 600 mm.
GB 708-88
GB
NATIONAL STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
UDC 669.14-418
Replacing GB 708-65
Dimensions, shape, weight and tolerances for cold-
rolled plates and sheets
ISSUED ON. FEBRUARY 15, 1988
IMPLEMENTED ON. JULY 1, 1989
Issued by. Ministry of Metallurgical Industry
Table of Contents
1 Classification and code ... 3
2 Definition ... 3
3 Size ... 3
4 Size tolerance ... 4
5 Appearance ... 7
6 Size measurement ... 8
7 Weight ... 8
Additional information ... 9
Dimensions, shape, weight and tolerances for cold-
rolled plates and sheets
This Standard applies to cold-rolled plates [Translator note. to align with ISO 16162-2000 and Clause 3 of GB 708-2006, hereafter “plate” is indicated as “sheet”] of which the width exceeds or equals to 600 mm, thickness is 0.2 ~ 5 mm, and cold-rolled sheets [Translator note. to align with ISO 16162-2000 and Clause 3 of GB 708-2006, hereafter “sheet” is indicated as “strip”] of which the thickness exceeds 3 mm. It is not applicable to narrow strips of which the direct rolling width is less than 600 mm.
1 Classification and code
1.1 Classify according to edge state
Trimming Q
Un-trimming BQ
1.2 Classify according to rolling precision
High precision A
Common precision B
2 Definition
2.1 Sheets are flat, rectangle, which can be directly rolled or cut from wide strip greater than 600 mm.
2.2 Strips refer to wide strip of which the width is not less than 600 mm, which are delivered in coil-form.
3 Size
3.1 Thickness, width of sheet and strip, length of sheet shall comply with provisions of Table 1.
3.2 Width of sheet and strip shall be any multiple-length of 10 mm. Length of sheet is any multiple-length of 50 mm.
Calculate steel density in accordance with theoretical weight; carbon steel’s density is 7.85 g/cm3. The density of other steels shall be in accordance with other relevant standards.
Example for marking.
Designation is 20, size is 1.0 mm × 1000 mm × 1500 mm, surface mass group is II, elongation level is S, it shall be marked as.
Sheet
Additional information
This Standard was drafted by Ministry of Metallurgical Industry Institute of Research on Information Standards, Anshan Iron and Steel Company.
Main drafters of this Standard. Wang Limin, Tang Yifan, Wang Huifan.
Level mark of this Standard. GB 708-88 I
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