Q345 is a steel material. It is a low alloy steel,overall performance is good, low-temperature performance, the performance of cold stamping,welding performance and good machinability widely used in bridges, vehicles, ships,construction and pressure vessel.q represents the yield of this material, behind the 345, the yield refers to the value of this material, in the 345 or so. As the material thickness will increase its yield value decreases.
This is a class distinction represents the main difference is the temperature of the impact of it. q345a level, is not to shock; q345b level is 20 degrees room temperature impact;q345c level, is 0 degree impact;q345d level, is the under 20 degree impact;q345e level is under 40 degrees impact. The impact of different temperatures. the impact of values are different.
In the plate,the case of low alloy series. In the low alloy material,such material is the most common.
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