Q/BQB 313-2019 English PDF

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Q/BQB 313-2019: Continuously-hot-rolled steel sheets and strips for building structures
Q/BQB 313-2019
BQB
ENTERPRISE STANDARD OF
BAOSHAN IRON AND STEEL CO., LTD
Replacing Q/BQB 313-2018
Continuously-hot-rolled steel sheets and strips for
building structures
Table of Contents
1 Chemical Compositions ... 3
2 Mechanical and Process Properties ... 3
3 Inspection and Test ... 4
Main Technical Indicators and Test Methods
(Public Statement)
1 Chemical Compositions
Table 2
Table 3
2 Mechanical and Process Properties
Table 8
Designation Chemical compositions
a (mass fraction)
a Other alloy elements can be added as required.
Designation Chemical compositions (mass fraction)
Designation Nominal thickness
Tensile test a
Upper yield
strength b Tensile strength Yield ratio
Elongation after
break % Test temperature
Impact
absorbance
energy KV2, J
V-shaped impact test a
a The tensile test takes transverse specimen; while the impact test takes longitudinal specimen.
b When the yield phenomenon is not obvious, adopt Rp0.2.