Luxfer MEL Technologies has developed this lightweight, high performance alloy for motorsport and aerospace applications. It is designed to provide superior mechanical properties and improved corrosion resistance together with good castability.
Excellent castability as a consequence of low oxidation characteristics.
Pattern makers shrinkage factor
Weldable by the tungsten arc inert gas process (TIG) with a filler rod of a similar composition. Castings should be heat treated after welding to obtain optimum properties.
Elektron®® 21 castings, like all magnesium alloy castings, machine faster than any other metal. Providing the geometry of the part allows, the limiting factor is the power and speed of the machine rather than the quality of the tool material. The power required per cubic centimetre of metal removed varies from 9 to 14 watts per minute depending on the operation.
All the normal chromating, anodising and finishing treatments are applicable.
ASTM B117 salt spray test corrosion rate for base metal: