The difference of Q345B steel plate and Q345B

The difference of Q345B steel plate and Q345B

Q345A steel plate (GB / T 1591-1994) ω /% performance and application: similar to the Q235 steel plate naming method. Q345asteel plate , Q345b steel plate , Q345c steel plate , Q345d steel plate , Q345e steel plate . This is the distinction of grade, represented by the main impact of the temperature is different! Q345a level, is not the impact; Q345b steel plate  level, is 20 degrees room temperature impact; Q345c steel plate level, 0 degree impact; Q345d steel plate level, is the impact of -20 degrees; Q345e steel plate level, is the impact of -40 degrees. At different impact temperatures, the impact values are also different.

The difference of Q345B steel plate,Q345A steel plate,Q345C steel plate,Q345D steel plate and Q345E steel plate.

grade

C

Si

Mn

P

S

V

Nb

Al

Ti

Cr

Ni

Cu

Q345A

≤0.20

≤0.50

≤1.70

≤0.035

≤0.035

≤0.15

≤0.07

-

≤0.20

≤0.30

≤0.50

≤0.30

Q345B

≤0.20

≤0.50

≤1.70

≤0.035

0.035

≤0.15

≤0.07

-

≤0.20

≤0.30

≤0.50

≤0.30

Q345C

≤0.20

≤0.50

≤1.70

≤0.030

≤0.030

≤0.15

≤0.07

≥0.015

≤0.20

≤0.30

≤0.50

≤0.30

Q345D

0.18

≤0.50

≤1.70

≤0.030

≤0.025

≤0.15

≤0.07

≥0.015

≤0.20

≤0.30

≤0.50

≤0.30

Q345E

≤0.18

≤0.50

≤1.70

≤0.025

≤0.020

≤0.15

≤0.07

≥0.015

≤0.20

≤0.30

≤0.50

≤0.30

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