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GB/T 38813-2020General requirements for hot-rolled pickled steel sheet and strip (English PDF)

热轧酸洗钢板及钢带的一般要求

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

June 2, 2020

Implementation date

January 1, 2021

Scope

GB/T 38813-2020 is the English-translated version of 热轧酸洗钢板及钢带的一般要求.

GB/T 38813-2020 is the Chinese standard "General requirements for hot-rolled pickled steel sheet and strip". Its scope clause reads: This Standard specifies the classification and code, size, shape, weight and tolerance, surface treatment method, surface quality of hot-rolled pickled steel sheet and strip.

This Standard is applicable to hot-rolled pickled steel strip of which the thickness is not greater than 16mm, width is not less than 600mm as well as its shear steel sheet (hereinafter referred to as steel sheet and strip).

Its clauses include classification and code; size, shape, weight and tolerance; surface treatment method; surface quality. It was issued by the State Administration for Market Regulation on JUNE 02, 2020 and took effect on DECEMBER 01, 2020.

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Document preview — GB/T 38813-2020

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

Foreword3
1 Scope4
2 Normative references4
3 Classification and code4
4 Size, shape, weight and tolerance4
5 Surface treatment method7
6 Surface quality7

1 Scope

This Standard specifies the classification and code, size, shape, weight and tolerance, surface treatment method, surface quality of hot-rolled pickled steel sheet and strip.

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 of the referenced document (including any amendments) applies.

GB/T 709, Dimensions, shape, weight and tolerances for hot rolled steel sheets and strips

3 Classification and code

3.2 According to surface quality, the classification and code are as follows: […]

3.1 Thickness accuracy is advanced thickness accuracy. The code is PT.C

a) Ordinary surface, FA;

b) Higher-level surface, FB;

c) Premium surface, FC.

4 Size, shape, weight and tolerance

4.1 The size, shape, weight and tolerance of steel sheet and strip shall comply with the provisions of GB/T 709. Specially required by the purchaser and agreed

5 Surface treatment method

Steel sheet and strip shall usually be oiled. The oil film shall be able to be removed with alkaline aqueous solution. Under the usual packaging, transportation, loading and unloading and storage conditions, the supplier guarantees that the surface of the steel sheet and strip shall not rust within 3 months from the date of completion of production. If the purchaser requires the supply not to be oiled, it shall be negotiated when ordering.

NOTE: For the unoiled products required by the purchaser, rust may occur, and the surface may be slightly scratched during transportation, handling, storage and use.

6 Surface quality

6.2 Requirements for surface quality of hot-rolled pickled steel sheet and strip

6.2.1 The surface quality levels and characteristics of hot-rolled pickled steel sheet and strip shall comply with the provisions of Table 4.

6.2.2 In the continuous production of steel strips, because local surface defects are not easy to be found and removed, steel strips are allowed to be delivered with defects. But the defective part shall not exceed 6% of the total length of each coil.

6.1 Requirements for surface quality of hot-rolled substrate

6.1.1 The surface of the hot-rolled substrate shall not have cracks, scars, folds, bubbles, inclusions, and iron oxide scales that are harmful to use. There shall be no visible delamination.

6.1.2 The surface of the hot-rolled substrate is allowed to have local defects such as pits, pits, roll marks, scratches and so on, whose depth (or height) does not exceed half of the thickness tolerance of the steel strip. But the minimum allowable thickness of the steel strip shall be guaranteed.

6.1.3 When the purchaser has special requirements for the surface of the hot-rolled substrate, a small number of defects that do not affect the formability and coating and plating adhesion are allowed on the surface, such as slight scratches, indentations, pitting, roll marks, and color differences.

6.1.4 In the continuous production of steel strips, because local surface defects are not easy to be found and removed, steel strips are allowed to be delivered with defects. But the defective part shall not exceed 6% of the total length of each coil. […]

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.

Referenced standards

Normative references

GB/T 709Dimension, shape, weight and tolerance for hot-rolled steel strip, plate and sheet

Cited by

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