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Q. |
Mushet steel belongs to which group of tool steels? |
A. | oil-hardening steels |
B. | air-hardening steels |
C. | high-speed steels |
D. | hot-working steels |
Answer» B. air-hardening steels | |
Explanation: mushet steel was the first air- hardening tool steel. it belongs to the cold- working family of tool steels. it was developed by robert mushet. |
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