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Q/BQB 303-2019 English PDF (QBQB303-2019)

Q/BQB 303-2019 English PDF (QBQB303-2019)

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Q/BQB 303-2019: Continuously hot-rolled steel sheet and strip for general structure

Major Technical Indicators and Test Methods
Q/BQB 303-2019
ENTERPRISE STANDARD OF
BAOSHAN IRON AND STEEL CO., LTD
Replacing Q/BQB 303-2014
Continuously hot-rolled steel sheet and strip for
general structure
ISSUED ON: FEBRUARY 02, 2019
IMPLEMENTED ON: APRIL 10, 2019
Issued by: Baoshan Iron and Steel Co., Ltd.
Table of Contents
1 Chemical composition ... 3
2 Mechanical and Process Properties ... 5
3 Inspection and Test ... 7
Major Technical Indicators and Test Methods (Public
Statement)
1 Chemical composition
Table 3
Designation Chemical composition
a (mass fraction) %
a Add other alloy elements as required.
b If Alt???0.020 or Als???0.015 or add other sufficient nitrogen-fixing elements, the maximum nitrogen is inapplicable. The inspection document shall provide the nitrogen-fixing element content.

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