Q345D is a commonly used low-alloy steel plate in China. Q345D and Germany's S355J2, the United States ASTM A529MGr50 is the same level, Chemical composition slightly different, the same mechanical properties.
GB/T1591 Q345D hot rolled steel with high strength, good toughness, easy to processing molding and good weld ability and other excellent properties.
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Main chemical elements composition of Q345D |
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C |
Si |
Mn |
P |
S |
V |
Nb |
Ti |
Al (min.) |
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0.18 |
0.55 |
1.00-1.60 |
0.030 |
0.030 |
0.02-0.15 |
0.015-0.060 |
0.02-0.20 |
0.015 |
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Thickness (mm) |
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Q345D |
≤ 16 |
> 16 ≤ 35 |
> 35 ≤ 50 |
>50 |
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Yield strength (≥Mpa) |
345 |
325 |
295 |
275 |
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Tensile strength (Mpa) |
470-630 |
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Application:
GB/T1591 Q345D steel it is widely used in ship, automobile, Bridges, buildings, machinery, pressure vessels and other manufacturing industries.