YD057埋弧无缝药芯焊丝；                                                         规格1.2-1.6-2.0-2.4-3.0-4.0，                                                                                       化学成分；C   0.2-0.5,Cr  4.0-6.0，Mo  0.5-1.5，V  0.5-1.0其他≦6.0，                硬度；44-50，                                                                                                               适用范围，热扎辊，开坯辊支撑辊的堆焊，