5356 is the most widely used welding alloy and can be classified as a general-purpose type filler alloy. It is typically chosen because of its relatively high shear strength. The 5XXX alloy base material, welded with 5356, with a weld pool chemistry greater than 3% Mg and service temperatures more than 65°c, is susceptible to stress corrosion cracking. The alloy is non-heat treatable.