What is a gray surface?

0 Answers   Essar,

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Will aluminum alloy like 380 or 356 settle? Meaning while in “liquid form” above melting point will the heavier elements like copper, fe, silicon, zinc etc. Settle to the bottom of the liquid/molten aluminum after a period.

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what is the difference beteeen Annealing and stress releaving

6 Answers  

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Is brass magnetic?

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What is select miller cutter?

0 Answers   Essar,

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Why steel is preferred for construction of aircraft?

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Define what is meant by hardening ability of metals?

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The Hardness of wheel(or)grade of wheel refers to the

0 Answers   NIC,

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Explain heat treatment of brass?

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What does allotropic mean what does iron and steel have to do with it?

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Define what is carbide?

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I currently use 17-7 PH stainless which is hardened to condition CH after forming. raw matl is .1.75"X .12" X .008". Its main usage after hardening is silicon wafer retainer where it's contantly cycled up and down to putin and remove wafer after 40-60 sec process at 400C temp. At this high temperature this part seemed to deform after a a couple of hundred wafer which is what it was designed for in the first place. THere is a proposal to go to a different material to increase lifeline of this part. My question is..... can 321 SST be a plugin replacement. I know this has a higher temp rating but how about its forming characteristics, will it have spring properties, and wont become brittle after prolonged exposure to 400C.

0 Answers   Novellus,

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