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Q/BQB 418-2021
BQB
ENTERPRISE STANDARD OF
BAOSHAN IRON AND STEEL CO., LTD
Replacing Q/BQB 418-2019
Cold-Rolled Advanced High Strength Steel Sheet and
Strip
ISSUED ON: JUNE 04, 2021
IMPLEMENTED ON: AUGUST 10, 2021
Issued by: Baoshan Iron and Steel Co., Ltd.
Table of Contents
Foreword ... 3
1 Chemical composition ... 4
2 Mechanical properties ... 5
3 Inspection and test ... 7
4 Appendix ... 8
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 by reference to EN 10338:2015, VDA 239-100:2016.
This Document replaced Q/BQB 418-2019 Cold-Rolled Advanced High Strength Steel
Sheet and Strip.
Compared with Q/BQB 418-2019, the major technical changes of this Document are
as follows:
--- Revise the upper limit requirement of Si content for 590DP steel grade from 0.6%
to 0.8%;
--- Add the corresponding definitions and technical index requirements for high
formability dual-phase steel designations;
--- Add HC950/1310DP designations and corresponding technical index
requirements;
--- Revise Appendix A Comparison List of Approximate Designations of Related
Standards at Home and Abroad;
--- 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.
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, Hu Jianwang.
The historical editions replaced by this Document are as follows:
Q/BQB 418-1999, Q/BQB 418-2003, Q/BQB 418-2009, Q/BQB 418-2014, Q/BQB
418-2018, Q/BQB 418-2019.
......
(Above excerpt was released on 2022-01-06, modified on 2022-01-06, translated/reviewed by: Wayne Zheng et al.)
Source: https://www.chinesestandard.net/PDF.aspx/QBQB418-2021