... .6mm D100mm D200mmD270mm D300mm K300mm 1kg,5kg,15kg,18kg,20kg chemical composition of welding wire(%)CMnSiPSCrNiCu0.06~0.151.40~1.850 ... impact(J)≥420≥500≥22≥27(-29)Application:Used to weld ship building steel ( A , B , D , E , A36 , D36 , E36 ...