Is Q245R low-carbon steel?

2022-06-07View Original

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According to 5.4.4 of NBT47016-2011, impact tests on the heat-affected zone are not required for specimens made of low-carbon steel, Q345R, and chromium-nickel austenitic steel. Does Q245R belong to low-carbon steel?

Reply #22022-06-08

Q245R isn’t considered an alloy steel; it’s 345R that is

Reply #32022-06-08

Yes, Q245 is carbon steel, and Q345 is also carbon steel, but we *tend to classify it as low-alloy steel.

Reply #42022-06-10

You* are always wrong; Q245R is low-carbon steel, while Q345R is low-alloy steel； An alloy steel can be called such only when the content of alloying elements is within a certain range

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Is Q245R low-carbon steel?

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