Weld Mold 9345 description: Weld Mold 9345 is a high tensile strength martensitic low alloy, high deposition product that produces sound, porosity-free, crack-free weld deposits in the “very tough” machinable range of hardness. It is an excellent buildup, underlay and hardfacing material for all wrought or cast steels and provides low impact and high metal to metal abrasion resistance at high temperatures.