高强度钢板是指牌号Q420钢，强度高，特别是在正火或正火加回火状态有较高的综合力学性能。主要用于大型船舶，桥梁，电站设备，中、高压锅炉，高压容器，机车车辆，起重机械，矿山机械及其他大型焊接结构件。
High strength steel plate is refers to the brand of Q420 steel, high strength, especially in normalizing or normalized and tempered condition have higher comprehensive mechanical properties. Mainly used for large ships, Bridges, power station equipment, medium and high pressure boiler, pressure vessel, rolling stock, hoisting machinery, mining machinery and other large welded structure.
牌号Q460钢，强度最高，在正火，正火加回火或淬火加回火状态有很高的综合力学性能，全部用铝补充脱氧，质量等级为C、D、E级，可保证钢的良好韧性的备用钢种。用于各种大型工程结构及要求强度高，载荷大的轻型结构。
Brand Q460 steel, the highest intensity, in normalizing, normalized and tempered or quenched and tempered state has high comprehensive mechanical properties, all deoxidization with aluminium added, quality grade for C, D, E, can guarantee the good toughness of steel spare material. Used for all kinds of large engineering structures and require high strength, large load of lightweight structure.

Q460是一种高强度的低合金钢。Q460的牌号表示方法：它的钢号冠以“Q”，代表钢材的屈服点，即屈服强度。后面的数字表示屈服点数值460代表460兆帕，兆是10的6次方，帕是压强单位帕斯卡。Q460就是钢材受力强度达到460兆帕时才会发生塑性变形，也就是当外力泄掉后，钢材只能保持受力的形状而无法回复原形，这个强度要比一般钢材大。一般质量等级符号分别为A、B、C、D、E　Q460在保证低碳当量的基础上，适当的增加了微合金元素的含量。良好的焊接性能要求钢材碳当量低，而微合金元素的增加在增加钢材强度的同时，也会增加钢材的碳当量。但好在增加的碳当量很少，所以不会影响钢材的焊接性能。
Q460 is a kind of high strength low alloy steel. Q460 brand representation: its steel grade dubbed "Q", on behalf of the steel yield point, yield strength. The Numbers behind the 460 represents 460 million mpa, yield point value is 10 power 6, palmer is PASCAL pressure units. Is Q460 steel occurs when the stress strength of 460 million mpa plastic deformation, which is when the external force drain off after the steel base can only maintain the shape of the stress and cannot be undone, this intensity is bigger than general steel. General quality level symbol of A, B, C, D, respectively EQ460 based on low carbon equivalent, appropriate to increase the content of micro alloying elements. Good welding performance of steel low carbon equivalent, and the increase of micro alloying elements in steel strength at the same time, also increase the carbon equivalent of steel. But fortunately very little increase of carbon equivalent, so will not affect the welding performance of steel.
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