GB/T 714 Q345q structural steel for bridges

Standard: GB/T 714-2008
Grades: Q345qC, Q345qD, Q345qE
Application:structural steel for bridges
Chemical composition (%) for GB/T 714 Q345q structural steel

Grades

C

Si

Mn

P

S

Nb

V

Ti

Cr

Ni

Cu

Mo

N

Als

Q345qC

≤0.20

≤0.55

0.90-1.70

≤0.030

≤0.025

≤0.06

≤0.08

≤0.03

≤0.80

≤0.50

≤0.55

≤0.20

≤0.012

≥0.015

Q345qD

≤0.18

≤0.55

0.90-1.70

≤0.025

≤0.020

≤0.06

≤0.08

≤0.03

≤0.80

≤0.50

≤0.55

≤0.20

≤0.012

≥0.015

Q345qE

≤0.18

≤0.55

0.90-1.70

≤0.020

≤0.010

≤0.06

≤0.08

≤0.03

≤0.80

≤0.50

≤0.55

≤0.20

≤0.012

≥0.015

Mechanical properties for Q345q structural steel

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
Q345qC	345	335	490	20	0	47
Q345qD	345	335	490	20	-20	47
Q345qE	345	335	490	20	-40	47

Q345q steel properties
GB/T 714 Q345q steel has high strength, toughness and withstands the load and impact of locomotives, and must have good fatigue resistance, certain low temperature toughness and atmospheric corrosion resistance. Low notch sensitivity.

Q345q structural steel plate and sheet are delivered in hot rolled, controlled rolled, normalized or normalized rolled condition. We can supply Q345qC, Q345qD steel sheets, Q345qE steel plate with thickness up to 100mm. Welcome to contact us email [email protected]  if you are interested in our Q345q bridge steel plate.

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