What are ceramics?

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what is the hardness of ohns before heat treatment process and hardness of en series before heat treatment process

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How much gold is in a troy ounce?

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carbon-3.23%,manganese-0.60%,silicon-2.25%,sulphur-0.086% phosphorus-0.122%,chromium-0.04%,nickle-0.10% molybdenum-trace. what is the grade of the above composition cast iron

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Which type of welding is used for welding of duplex and super duplex steel?

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HOW TO GET LAST 10 YRS. QUESTION PAPERS

0 Answers   ONGC,

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Which pump is preferred for small discharge at high pressure?

0 Answers   NIC,

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What is a gray surface?

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 lathe bed made of ?

0 Answers   Essar,

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What is iron ferrite, define what is it used for, and where is it found?

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Is it possible to design heat treatment processes such that a gradient in grain size is produced?

4 Answers  

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