For the welding of dissimilar nickel materials and nickel materials and austenitic stainless steels, the following factors should be considered:

        The strength of the beryllium weld (including the high temperature durable strength), corrosion resistance meet the design;

        ◇ Select welding material with similar coefficient of linear expansion and base metal.

        ◇ Consider the susceptibility of welding consumables to weld cracks and porosity.