Effect of cooling process on microstructure and properties of Q345NQR2 steel specification

Meaning of S355J2W: S is structural steel, 355 means the yield strength of 355MPa, J2 requires -20℃ impact, and the letter W indicates that the S355J2W steel has the ability to resist atmospheric corrosion. Q345NQR2 steel specification, S355J2W is a fine-grained steel, which is widely used for welding, bolting and riveting parts of high-speed rail bogies.

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