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

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When using mercury to recover very, fine gold from ore, define what is the best way to separate the gold laden mercury from the ore?

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What is dielectric medium in EDM ?

0 Answers   NIC,

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When using mercury to recover very, fine gold from ore, what is the best way to separate the gold laden mercury from the ore?

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For 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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Explain super alloys?

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What is a silver in deming drill bit?

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What are the superalloys?

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What is select miller cutter?

0 Answers   Essar,

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The requirement for ASTM A217 Gr. WC9 castings for valves components like Body and Bonnet were Normalising at 920+/- 20 Deg. C and Tempring 780+/- 20 Deg. C The specification calls furnace shall be calibtated within +/-14 deg. C The Heat Chart shows minimum temperature for normalising 900 to 920 Deg. C, but maximum temperature 960-990 Deg. C Tempering 780+/-20 Deg. C is within limits and accepted. Casting having integral test bars, heat trated along with castings passed in chemical znalysis and mechanical properties. Since normalising maximum temperature is not meeting specification, where castings can be salvaged or renormalised and retempered to meet specification. Whether it will have affect on remechanical properties testing

0 Answers   Leader Valves,

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what is a rate controlling step ? how is it dependent on reaction path ? explain with an example.

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In grey iron sulpher was above 0.15% what react on metal?

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