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.

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What is thermodynamic state of metal?

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For define what reason would an aluminum casting, when applied with a powder coated paint finish, cause a poor finish to the paintwork.

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How would a salt and water solution clean a penny but a vinegar and salt solution will not clean a penny? What is the cause of this?

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When might secondary melting processes be unnecessary?

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Define what is the minimum temperature for stress relieving of astm a 519 gr.4130 material and please tell us where we can find the location.

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what kind of cleaning substance or treatments keep or help prevent cast iron from rusting?

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what happens when a EM wave is transmitted

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Discuss advantage of different types of screw.

0 Answers   Essar,

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How is solution annealing carried out? Define what type of furnace is required? Does one need to be heat in a salt bath?

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What is a boring tool ?

0 Answers   Essar,

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why does pure titanium burn on rubbing with pure titanium?

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