GB/T 714-2008 Q345qD grade

GB/T 714-2008 Q345qD grade steel belongs to structural steel for bridge. The Q345qD steel products are produced in plates thickness less than 150mm, steel sheets, strips and cutting steel parts less than 25.4mm thickness, and steel sections less than 40mm. Welcome to contact us email:service8@katalor.com if you are interested in our bridge steel Q345qD plate.

　　Q345qD steel chemical composition (%)
C
Si
Mn
P
S
Nb
V
Ti
Cr
Ni
Cu
Mo
N
Als
≤0.18
≤0.55
0.90-1.70
≤0.025
≤0.025
≤0.06
≤0.08
≤0.03
≤0.80
≤0.50
≤0.55
≤0.20
≤0.012
≥0.015

Q345qD steel mechanical properties

Grade
Yield strength(MPa) min for Thickness in mm
Tensile strength min.
Elongation
V-type impact test
≤50
>50≤100
Mpa
% min
Test temperature ℃
Impact absorption energy KV₂/J
Q345q
345
335
490
20
0
47
　　
GB/T 714 Q345qD structural steel plates and sheets are supplied in normalized, thermo-mechanical rolling, quenched and tempered condition. The bridge steel is also featured with atmospheric corrosion resistance.

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