一种抗震耐蚀耐火建筑结构钢用690MPa级埋弧焊丝，属于焊接材料技术领域。化学元素质量百分比含量为：C：0 .01-0 .15％，Si：0 .10-0 .40％，Cr：0-0.70％，Ni：1 .0-3 .5％，Cu：0 .20-0 .90％，Mn：1 .20-2 .20％，Mo：0 .60-1 .00％，Ti：0-0 .12％，V：0-0 .10％，Mg：0-0 .10％；余量为Fe及不可避免的杂质。优点在于，采用该焊丝焊接形成的焊缝金属兼具有较高的室温强度和高温强度，同时采用该焊丝焊接形成的焊缝金属还具有良好的抗裂性能、较好的焊接性能以及较好的塑性。

A kind of 690 MPa grade submerged arc welding wire for anti-seismic corrosion and fire-resistant building structural steel belongs to the technical field of welding materials. The contents of chemical elements are as follows : C : 0.01-0.15 %, Si : 0.10-0.40 %, Cr : 0-0.70 %, Ni : 1.0-3.5 %, Cu : 0.20-0.90 %, Mn : 1.20-2.20 %, Mo : 0.60-1.00 %, Ti : 0.12 %, V : 0.10 %, Mg : 0.10 %. The remainder is Fe and inevitable impurities. The advantage is that the weld metal formed by the welding wire has high room temperature strength and high temperature strength, and the weld metal formed by the welding wire also has good crack resistance, good welding performance and good plasticity.