Q/BQB 381-2019 English PDF

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Q/BQB 381-2019: Hot Continuous Rolled Steel Sheet and Strip for Hydro-generator Magnetic Yoke
Q/BQB 381-2019
BQB
ENTERPRISE STANDARD OF
BAOSHAN IRON AND STEEL CO., LTD
Replacing Q/BQB 381-2018
Hot Continuous Rolled Steel Sheet and Strip for
Hydro-generator Magnetic Yoke
Table of Contents
1 Chemical Compositions ... 3
2 Mechanical and Process Properties ... 3
3 Magnetic Properties ... 4
4 Inspection and Test ... 4
Main Technical Indicators and Test Methods
(Public Statement)
1 Chemical Compositions
Table 3
2 Mechanical and Process Properties
Table 4
Designation
Chemical compositions a (mass fraction)
a In order to improve the steel properties, other alloy elements can be added as required.
Designation
Tensile test a
Yield strength Tensile strength Elongation after break %
180° bend test b
D – diameter of bending
head
a – specimen thickness
a The tensile test takes transverse specimen.
b The bending test takes transverse specimen. Bending specimen width b≥20mm; b=20mm for arbitration test.