Engineering Control for High Volume 390 Die Casting

To functionally replace cast iron with aluminum and avoid the cost and design penalties associated with wear plates and steel inserts, an aluminum alloy with physical and wear properties superior to those available in 380 was required. 390 was first used, in high volume, during the early 1970’s by General Motors for the Vega engine block. When the Vega was superseded, extensive use of 390 stopped, but its unique ability to be used in applications subject to wear was not forgotten. This paper addresses the major engineering and metallurgical principles which must be considered and how they influence the various aspects of casting design and production.