Question: 1 6 . 3 3 For 3 9 hours during each week of service in a particular application, alloy A - 2 8 6 is

16.33 For 39 hours during each week of service in a particular application, alloy A-286 is subjected to a stress of 200 MPa and a temperature of 650C. However, for one additional hour in each week, the stress is 150 MPa and the temperature is 750C. If a safety factor of 10 on life is required, what is the useful service life?
1 6 . 3 3 For 3 9 hours during each week of

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