Steel designation

2019-09-20View Original

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Dear experts, should Q345 forgings be written as Q345Ⅱ or 16MnⅡ?

Reply #22019-09-20

NB/T 47008-2017, only 16MnⅡ

Reply #32019-09-20

For r, it should be written as the material grade; I think it’s Q345RII

Reply #42019-09-20

For r, it should be written as the material grade; I think it’s Q345RII

Reply #52019-09-20

Doesn’t the new standard eliminate the 16 MN grade?

Reply #62019-09-21

Isn’t it all Q345 these days? It should be Q345R!

Reply #72019-09-21

Carbon steel and low-alloy steel forgings, refer to 47008

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Steel designation

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