用途:适用于焊接抗拉强度为890N/mm2等级的高强钢结构，如工程机械、起重机械、桥梁等的焊接。焊丝化学成分（%）CMnSiSPNiMoCrTiCu保证值≤0.111.60~1.900.40~0.80≤0.025≤0.0252.00~2.500.50~0.800.20~0.60≤0.12≤0.50)