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GB/T 714 Q420qC structural steel for bridge

GB/T 714 Q420qC structural steel for bridge

What is the Q420qC grade steel? Katalor Industry is a leading exporter of hot rolled structural steel plates in China. It can supply and export high quality Q420qC grade hot rolled plates with competitive price.
Q420qC steel plate implements the standard GB/T 714-2008.
Equivalent: S275J2
Size: Q420qC plate thickness up to 150mm

GB/T 714 Q420qC steel chemical composition (%)


Grades

C

Si

Mn

P

S

Nb

V

Ti

Cr

Ni

Cu

Mo

B

N

Als

Q420qC

≤0.18

≤0.55

1.00-1.70

≤0.030

≤0.025

≤0.06

≤0.08

≤0.03

≤0.80

≤0.70

≤0.55

≤0.35

≤0.004

≤0.012

≥0.015

 

Q420qC steel mechanical properties


Grades

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

Q420qC

420

410

540

19

0

47

GB/T 714 Q420qC steel has high strength and good fatigue resistance; high toughness and low brittle transition temperature; good cold forming performance and welding performance; good corrosion resistance and certain wear resistance. In normalizing or normalizing and tempering state, Q420qC steel plate has high comprehensive mechanical properties.

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