Define what is special about the properties of chromium molybdenum steels that make them ideal for pressure vessels?

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why magnetite iron ore is not taken into the blast furnace?

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carbon-3.23%,manganese-0.60%,silicon-2.25%,sulphur-0.086%, phosphorus-0.122%,chromium-0.04%,nickel-0.10%,molybdenum- trace.

3 Answers  

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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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What is investment casting?

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what are different grades of mild steel available for making machine structure (housing)

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What is a silver and deming drill bit?

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Is brass magnetic?

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What do you do with the super alloys in the present working culture so as to improve the technology for general people?

2 Answers   Magnum,

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Why is steel vital in the construction of an aircraft?

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what is the metallurgy use?

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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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