Characteristics of S355NL steel plate: impact absorption energy test shall be conducted in a low temperature environment of -50℃, and the impact value shall not be less than 27J.
Characteristics of S355ML steel plate: the yield value will decrease with the increase of material thickness, and the domestic steel plate may be less than 345MPa, so the strength must be not less than 345MPa during mechanical design, otherwise problems will occur.
Characteristics of Q345 steel plate: Q345 has good comprehensive mechanical properties, low temperature properties, good plasticity and weldability.
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