This is an alloy researched and developed by General Motors, which exhibits greatly improved strength, hardness and creep performance due to the high copper and low aluminium contents. This alloy also has excellent bearing properties.
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This is an alloy researched and developed by General Motors, which exhibits greatly improved strength, hardness and creep performance due to the high copper and low aluminium contents. This alloy also has excellent bearing properties.

The behaviour of zinc alloys under stress is non-linear and time-temperature dependent on strain-rate, i.e. the ratio of stress to strain is not constant, even at low stresses, and varies with time resulting in continuous plastic flow under constant applied load. Designers of structural components should be aware of the creep limitations of zinc alloys, which do not have a single value for elastic modulus or yield strength. Yield strength (allowable stress) under sustained loading is dependent on the allowable design strain (% elongation) over the required service life. Standard engineering formulae used for calculating cross-sections of elastic materials must therefore be used with some caution. The value given for Young's modulus in the table below should only be used as a first estimate.