Q/BQB 479-2021 English PDF

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Q/BQB 479-2021: Cold-rolled strip of full hard carbon steel
Q/BQB 479-2021
BQB
ENTERPRISE STANDARD OF
BAOSHAN IRON AND STEEL CO., LTD
Replacing Q/BQB 479-2019
Cold-Rolled Strip of Full Hard Carbon Streel
ISSUED ON: JUNE 04, 2021
IMPLEMENTED ON: AUGUST 10, 2021
Issued by: Baoshan Iron and Steel Co., Ltd.
Table of Contents
Foreword ... 3
1 Allowable deviation of the width of steel strip ... 4
2 Chemical composition ... 4
3 Surface quality ... 4
4 Inspection and test ... 4
5 Annex ... 5
Foreword
This Document was drafted as per the rules specified in GB/T 1.1-2020 Directives for
Standardization – Part 1: Rules for the Structure and Drafting of Standardizing
Documents.
This Document was formulated according to the actual production situation of the
Baoshan Iron and Steel Co., Ltd.
This Document replaced Q/BQB 479-2019.
Compared with Q/BQB 479-2019, this Document has the major technical changes as
follows:
--- Adjust the upper limit of the supply thickness from 3.2mm to 3.5mm;
--- Add surface quality distinction requirements;
--- Supplement the inspection lot batching rules;
--- Make editorial modifications.
Please note some contents of this Document may involve patents. The issuing agency
of this Document does not assume the responsibility to identify these patents.
The Annex A of this Document is informative.
This Document was proposed by Manufacturing and Management Department of the
Baoshan Iron and Steel Co., Ltd.
This Document shall be under the jurisdiction of Manufacturing and Management
Department of the Baoshan Iron and Steel Co., Ltd.
Drafting organization of this Document: Manufacturing and Management Department
of the Baoshan Iron and Steel Co., Ltd.
Chief drafting staffs of this Document: Yuan Min, and Wang Hui.
The historical editions replaced by this Document are as follows:
Q/BQB 479-2018, Q/BQB 479-2019.