____________________ are normally subjected to sub-zero treatment?
Correct answer: B. Gauges or precision parts
- A. Highly stressed parts
- B. Gauges or precision parts
- C. Cold rolled sheets
- D. Non machinable materials
Explanation
Sub-zero treatment is commonly applied to gauges and precision components to improve dimensional stability after hardening. It transforms retained austenite and reduces later dimensional changes, making precision parts more reliable.
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