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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State some precautions to be taken in case of powder metallurgy?

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Where is iron ferite used?

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how would you find out the type of stailess steel that has been used to make your dish?

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What is impact energy?

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How do you classify shapers?

0 Answers   Essar,

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

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Define what is widman statten structure?

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Water hammer in pipes occur due to ?

0 Answers   NIC,

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dear sir i need some information about prevent eutectic carbide network(as cast) formation in 12% cr steel casting by another alloying element(my analays: c=1.2-1.4 cr=11-13 mo=0.2-0.4 ni=0.2-0.4 )or break network carbid after formation in solidification by heat tretment please help me my email adress: alloymail@gmail.com

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Define what is the difference between plaster used in gold investment casting and ceramic used in the process of investment casting of automobile engine parts and turbine blades etc. When both are used in the lost-wax method?

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does any one has gate solutions of 2007,08,09 metallurgical engg papers?

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