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Answer Posted / rajesh
NDT is used to check the properties of the material after
welding to know there defects like cracking,porosity etc
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Does case harden steel properties detoriates over time? Especially for guns, parts like bolt carrier, the brand new parts has been kept for 10 year and properly oiled. I am worried about its surface hardness to take the blow during firing.
sir please send me previous question papers on metallurgy at vishal.nitrr07@gmail.com .....thank you
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