Q345D steel plate belongs to low alloy high strength steel plate with good low temperature impact performance. Q345D steel grade is composed of three parts: Chinese phonetic alphabet, yield strength value, quality grade symbol representing yield strength. Among them:
Q indicates yield strength;
345 indicates yield strength value, unit MPa;
D indicates rank (-20 degree impact);
Q345D steel plate is a low Alloy steel plate under GB/T1591. Q345D steel plate is widely used in bridges, vehicles, ships, buildings, steel structures and so on. Q represents the yield of this material, and the latter 345 is the yield value of this material, around 345. D is different from the same kind of A, B, C grade, which is produced at low temperature impact of -20 C.
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