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Castings produced by investment casting do not require any further machining for finishing of the surface.

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Castings produced by investment casting do not require any further machining for finishing of the surface.

(a) True

(b) False

This question was addressed to me in exam.

I'd like to ask this question from Precision Investment Casting topic in portion Special Casting Techniques of Casting-Forming-Welding I

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Correct option is (a) True

The explanation: As control of grain size and its orientation is possible in investment castings, so it makes the casting ready for use without any requirement of machining. This is particularly useful for those hard to machine materials such as nimonic alloys. So this process saves time and money both, which is usually spent on machining for other processes.

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