GB T 16270 Q460E steel plates belong to low alloy high strength steel. Its comprehensive mechanical properties are especially high in the state of normalizing or normalizing and tempering. Q460E high strength steel plates are mainly used for large ships, bridges, power plant equipment, medium and high pressure boilers, high pressure vessels, rolling stock, lifting appliances, mining machinery and other large welded structures.
In Q460E steel, Q represents the yield point or yield strength. The following number 460 indicates that the yield point value is 460 MPa. When the force reaches 460 MPa, GB T 16270 Q460E steel plates will occur plastic deformation. When the external force is released, the Q460E steel can only maintain the shape and cannot restore the original shape. The strength of Q460E steel plates is larger than that of many ordinary steel.
On the basis of low carbon equivalent, GB T 16270 Q460E steel plates are appropriately increased the content of microalloying elements. Good welding performance requires low carbon equivalent of steel. The increase of microalloying elements will increase the strength and also carbon equivalent of Q460E steel. But the increase of carbon equivalent is very little, so it does not affect the welding performance of Q460E steel plates.
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