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Piston is made of cast aluminum because of its high heat transfer rate.One important thing to take care while using it (cast aluminum) is, because it expands appreciably on heating so right amount of clearance needs to be provided or else it will lead the engine to seize.
Wiki User
∙ 12y ago
Wiki User
∙ 11y agoToday, most engines use drop-forged aluminum, which means they put aluminum under huge presses and compact the aluminum. This compresses the aluminum molecules together more closely and increases their density. Then the aluminum goes through machining to be made into a piston .
Wiki User
∙ 8y agoSoft metals such as Aluminum are popular for automotive pistons because they are light and cause less friction.
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