Why pressurized gating system is used in ci casting but not in steel or aluminum?
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because their some big problem i explain later
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ANSWER:
Pressurized gating system is used in casting metals instead of aluminum and steel as this system minimizes the turbulence and avoids shrinkage in metal.
EXPLANATION:
The Pressurized gating system reduces aspiration as the sprue always runs full. Turbulences could also be avoided and the metals could be made by avoiding sharp corners.
Even non-metallic inclusion could also be trapped and casting could be solidified. As Steel and aluminum possess low tensile strength they are not suited for casting.
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