Genesis Alloy 4 (GZ4) Alloy 4 was developed in Asia. It has a copper level midway between Alloy 3 & 5. It has been found to reduce the effects of die soldering that occurs in some castings when made from Alloy 3, but still retains ductility similar to Alloy 3.   Typical Compositions of GZ4 Element   Percentage (%) Aluminum (Al)   4.1 Magnesium (Mg)   0.045 Copper (Cu)   0.4 Lead (Pb)   0.002 Cadmium (Cd)   0.001 Tin (Sn)   < 0.001 Iron (Fe)   0.002 Nickel (Ni)   < 0.001 Silicon (Si)   0.005 Indium (In)   < 0.0005 Thallium (Tl)   < 0.001 Zinc (Zn)   Balance   Chemical Specifications of GZ4 Element   Min(%)   Max(%) Aluminum (Al)   3.9   4.2 Magnesium (Mg)   0.04   0.05 Copper (Cu)   0.3   0.4 Lead (Pb)   --   0.003 Cadmium (Cd)   --   0.002 Tin (Sn)   --   0.001 Iron (Fe)   --   0.020 Nickel (Ni)   --   0.001 Silicon (Si)   --   0.02 Indium (In)   --   0.0005 Thallium (Tl)   --   0.001 Zinc (Zn)   --   Balance   Physical Specification       Slab   Bundle   Grade Stamp   GZ4   --   Mass (nominal)   10kg   1120kg   Dimensions in mm (nominal)   480 x 109 x 36   960 x 436 x 540   Pack Size   --   112