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Q/BQB 408-2019 English PDF (QBQB408-2019)

Q/BQB 408-2019 English PDF (QBQB408-2019)

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Q/BQB 408-2019: Cold formed low carbon steel sheet and strip for cold forming

This Standard was prepared by referring to JIS G 3141:2017, EN 10130:2006, JFS A 2001:2014. This Standard replaces Q/BQB 408-2018.
Q/BQB 408-2019
ENTERPRISE STANDARD OF BAOSTEEL CO., LTD.
Replacing Q/BQB 408-2018
Low carbon cold-rolled steel sheet and strip for cold
forming
ISSUED ON: FEBRUARY 02, 2019
IMPLEMENTED ON: APRIL 10, 2019
Issued by: Baoshan Iron and Steel Co., Ltd.
Table of Contents
Foreword ... 3
1 Chemical composition ... 4
2 Mechanical properties ... 4
3 Inspection and test ... 6
4 Annex ... 7
Foreword
This Standard was drafted in accordance with the rules given in GB/T 1.1-2009 ?€?Directives for standardization - Part 1: Structure and drafting of standards?€?. This Standard was prepared by referring to JIS G 3141:2017, EN 10130:2006, JFS A 2001:2014.
This Standard replaces Q/BQB 408-2018.
Compared with Q/BQB 408-2018, main changes in this Standard are as follows: -- added description on special roughness control requirements;
-- revised Annex C Control table of similar designations of related standards are home and abroad.
Annex A of this Standard is normative. Annex B and Annex C are informative. This Standard was proposed by Manufacturing Management Department of
Baoshan Iron and Steel Co., Ltd.
This Standard shall be under the jurisdiction of Manufacturing Management Department of Baoshan Iron and Steel Co., Ltd.
The drafting organization of this Standard: Manufacturing Management
Department of Baoshan Iron and Steel Co., Ltd.
Drafters of revision of this Standard: Yuan Min, Mao Mingxi.
Versions of standard substituted by this Standard are: Q/BQB 408-1988,
Q/BQB 408-1994, Q/BQB 408-1999, Q/BQB 408-2003, Q/BQB 408-2009,
Q/BQB 408-2014, Q/BQB 408-2018.
Low carbon cold-rolled steel sheet and strip for cold
forming
1 Chemical composition
Table 4
Table 5
Table 6
2 Mechanical properties
Designation Chemical composition
a (melting analysis) % (mass fraction)
a It is allowed to add other alloying elements.
b SPCC-X is a specific designation.
Designation Chemical composition (melting analysis) % (mass fraction)
a It is allowed to add Nb and/or Ti.
b Nb is allowed to replace part of Ti. At this time, the total content of Nb and Ti shall not be greater than 0.20%. Designation Chemical composition (melting analysis) % (mass fraction)
a It is allowed to add Nb and/or Ti.
b Nb is allowed to replace part of Ti. At this time, the total content of Nb and Ti shall not be greater than 0.20%.

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