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The specification of an alloy for a cast component is based upon the mechanical properties it can achieve. For the designer and buyer, it is important to understand that the properties obtained from a particular combination of casting alloy may be different from one foundry to another. This is due to mainly the raw material used such as the alloy ingots .. etc. This will affect the characteristics of a cast such as soundness, machinability, corrosion resistance and conductivity adversely.

Special mechanical properties are obtained in many alloys through accurate control of proportion in chemistry, manufacturing processes and heat treatment processes. Reliable ingot producers can supply foundries with desirable ingot that meet their requirement and with heat treatment specifications designed to obtain specific mechanical properties desired. 

But, while some mechanical properties are improved, it is at the expense of others. For example, higher elongation and lower hardness result in losses in tensile and yield strengths. This is a vise-versa situation where you cannot acquire all, designer and buyer will have to compromise on what to emphasize of the cast. That is the priorities of the cast, ease of manufacturing, cost wise, corrosion resistance and conductivity...etc.

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Last modified : 10/08/03