Weldable Cast Nickel Base Superalloy Nickel base superalloys of the type referred to as Waspaloy are rendered weldable by limiting the iron content to about one twentieth of that which is commonly present, adding small amounts of manganese to the alloy and removing the zirconium which is commonly present. In addition, the sulfur, bismuth and lead levels are held to the lowest possible limits, and preferably the aluminum and molybdenum are maintained in the lower half of their normal range. By implementing these alloying strategies, the weldability of the cast material is dramatically improved and for the first time castings of the Waspaloy materials are rendered consistently weldable on a commercial scale. |