Q345 is a steel material. It is a low alloy steel (C < 0.2%), widely used in construction, bridges, vehicles, ships, pressure vessels, etc. Q stands for the yield strength of this material. The latter 345 is the yield value of this material, which is about 345 MPa. The yield value will decrease with the increase of material thickness. 

Q345 has excellent mechanical properties, good performance in low temperatures, and excellent weldability and plasticity. It is most commonly used in building structures, low-pressure vessels, cranes, mechanical parts, bridges, ships, petroleum storage tanks, lifting machinery, power stations, mining machinery, general metal parts, and in other structures that are exposed to temperatures of -40 ℃ or below or experience high-loads.

Chemical Composition:

Physical properties :

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