steel pipe Q345

The material Q345 in fluid pipe in GB8163 there have three grade: Q345A,Q345B and Q345C. Q345 is also called 16Mn.

The component analysis is as the following:

Grade

Chemical Component /％

C

Si

Mn

Cr

Mo

V

Ni

Ti

Nb

Cu

N

P

S

Q345A

≤0.20

≤0.50

≤0.17

≤0.30

≤0.10

≤0.15

≤0.50

≤0.20

≤0.07

≤0.30

≤0.012

≤0.030

≤0.030

Q345B

≤0.20

≤0.50

≤0.17

≤0.30

≤0.10

≤0.15

≤0.50

≤0.20

≤0.07

≤0.30

≤0.012

≤0.030

≤0.030

Q345C

≤0.20

≤0.50

≤0.17

≤0.30

≤0.10

≤0.15

≤0.50

≤0.20

≤0.07

≤0.30

≤0.012

≤0.030

≤0.030