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Answer Posted / srinath
x ray testing,ultrasonic testing,magnrtic resonance testing
etc
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The hardness of steel depends on
For the same part, it is possible to Specify the two different type of Hardness with same scall(EX-Quenching and tempering==>450 to 500HV30 & Hardening and Austempering 330- 380HV30)
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