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