HOW DOES HEAT OF ELECTRIC ARC WELDING AFFECT HIGH-MANGANESE STEEL WELDMENTS?
It has little effect on Manganal from a practical operational standpoint. A rough rule of thumb would be to not allow any local area to remain at visible red-heat for more than 2 or 3 minutes (1100-1200F approx.) at a time. In the electric welding process, localized heat is dissipated fairly rapidly into the air and the bulk of the weldment. In the case of high build up with many layers of weld passes the welder may either skip weld or weld intermittently to reduce localized heat. • HOW ABOUT THE EFFECT OF HEAT ON THE WELD METAL OF 12/14% MANGANESE WELD DEPOSITS? It has no effect on strength or ductility. Practically all electrode manufacturers alloy the EFeMn group with nickel, molybdenum, or other alloys which do away with any danger of embrittlement in the weld itself. • WHAT STRENGTH CAN BE EXPECTED IN 12/14% MANGANESE WELD METAL? Assuming reasonably good welding procedures the all-weld metal tensile strength of AWS EfeMn electrode is about 125,000 psi. In addition, the weld metal
