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What is the value of antimony present in a Babbit metal?

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in Automotive Engine Design by (137k points)
What is the value of antimony present in a Babbit metal?

(a) 5.5

(b) 7.5

(c) 6.5

(d) 8.5

This question was addressed to me in unit test.

The origin of the question is Valve Timing Technologies in portion Valve Timing Technologies of Automotive Engine Design

1 Answer

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The correct answer is (b) 7.5

To explain I would say: The Babbit metal are either antimony-tin or antimony-lead alloys. They have a very good conformability, embeddability, and corrosion resistance but a low fatigue strength. It has 7.5% of antimony, 0.2% lead, 0.1% arsenic, 3.0% copper and tin remainder.

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