ER49-1说明:ER49-1焊丝具有优良的焊接工艺性能。焊接时电弧稳定，飞溅较少，具有良好的抗气孔性能。用途:焊接低碳钢及某些低合金钢结构。焊丝化学成分(%)CMnSiSPCuNiCr≤0.111.80~2.100.65~0.95≤0.03≤0.03≤0.50≤0.30≤0.20熔敷金属力学性能试验项目Rm(MPa)ReL或Rp0.2(Mpa)A(%)KV2(J)保证值≥490≥372≥20≥47(室温))