一、WQ690E钢板介绍：
1、 Introduction to wq690e steel plate:
WQ690E钢板归于高强度焊接结构钢。其间W代表舞钢出产，Q代表屈服强度，690代表屈服强度值，E代表钢板的等级；常见的钢板质量等级分别为A、B、C、D、E。E级钢板的冲击为-40°C。WQ690E钢板交货情况:TMCP+回火，调质。WQ690E钢板实行标准：GB/T16270-。WQ690E钢板类似商标：Q690E、ASTM SQ690E、武钢HG785E
Wq690e steel plate is a high-strength welded structural steel. Where w represents the production of Wugang, Q represents the yield strength, 690 represents the yield strength value, and e represents the grade of steel plate; The common quality grades of steel plates are a, B, C, D and E. The impact of Grade E steel plate is - 40 ° C.
Delivery status of wq690e steel plate: TMCP + tempering, quenching and tempering. Executive standard of wq690e steel plate: GB / t16270-. Similar grades of wq690e steel plate: q690e, ASTM sq690e, WISCO hg785e
二、WQ690E钢板化学成分：
2、 Chemical composition of wq690e steel plate:
成分 C Si Mn P S Ni Cr Mo Nb Ti B
Composition C Si Mn p s Ni Cr Mo NB Ti B
WQ690E ≤0.18 ≤0.60 ≤2.0 ≤0.030 ≤0.025 ≤0.80 ≤1.00 ≤0.30 ≤0.11 ≤0.020 ≤0.004
WQ690E ≤0.18 ≤0.60 ≤2.0 ≤0.030 ≤0.025 ≤0.80 ≤1.00 ≤0.30 ≤0.11 ≤0.020 ≤0.004
碳当量计算公式：CEV=C+Mn/6+(Cr+Mo+V)/5+(Ni+Cu)/15
Carbon equivalent calculation formula: CEV = C + Mn / 6 + (Cr + Mo + V) / 5 + (Ni + Cu) / 15
WQ690E钢板P、S 元素含量对钢板功用影响：
Effect of P and S element content on the properties of wq690e steel plate:
磷（P）：在一般情况下，磷是钢中有害元素，增加钢的冷脆性，使焊接功用变坏，下降塑性，使冷弯功用变坏。因此一般要求钢中含磷量小于0.045%，优质钢要求更低些。
Phosphorus (P): in general, phosphorus is a harmful element in steel, which increases the cold brittleness of steel, deteriorates the welding performance, reduces the plasticity and deteriorates the cold bending performance. Therefore, the phosphorus content in steel is usually required to be less than 0.045%, and the requirements for high-quality steel are lower.
硫（S）：硫在一般情况下也是有害元素。使钢产生热脆性，下降钢的延展性和耐性，在铸造和轧制时构成裂纹。硫对焊接功用也倒霉，下降耐腐蚀性。所以一般要求硫含量小于0.055%，优质钢要求小于0.040%。在钢中参与0.08-0.20%的硫，可以改善切削加工性，一般称易切削钢。
Sulfur (s): sulfur is also a harmful element under normal circumstances. Make the steel produce thermal brittleness, reduce the ductility and toughness of the steel, and cause cracks during forging and rolling.
Sulfur is also unfavorable to welding performance and reduces corrosion resistance. Therefore, the sulfur content is usually required to be less than 0.055%, and the high-quality steel is required to be less than 0.040%. Adding 0.08-0.20% sulfur to steel can improve machinability, which is usually called free cutting steel.
三、WQ690E钢板力学功用：
3、 Mechanical properties of wq690e steel plate:
商标 检测项目 效果描绘 效果或测定值
Description of brand test item results or measured values
WQ690E Rp0.2 Mpa ≥640
WQ690E Rp0.2 Mpa ≥640
Rm Mpa ≥730
Rm Mpa ≥730
A50 % ≥14
A50 % ≥14
180°冷弯 d=3a 无缺
180 ° cold bending d = 3A intact
﹣20°C冲击功 J 47
- 20 ° C impact energy J 47
WQ690E钢板什物进行查验时抗拉、屈服值都略高于标准值100Mpa.
During the physical inspection of wq690e steel plate, the tensile and yield values are slightly higher than the standard value of 100MPa
四、WQ690E钢板运用：
4、 Application of wq690e steel plate:
WQ690E钢板可称为屈服强度690Mpa的耐低温高强钢，具有较高的屈服强度和抗拉强度，广泛运用于煤矿机械、工程机械，如液压支架、港口起重机、平板运输车。
Wq690e steel plate can be called low temperature resistant high-strength steel with yield strength of 690mpa. It has high yield strength and tensile strength. It is widely used in coal mining machinery and engineering machinery, such as hydraulic support, port crane and flat transport vehicle.
