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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Discuss steam engines. What is its overall efficiency ?

0 Answers   Essar,

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What is recrystallization?

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Do you know define what metal might be considered the “most environmental”? I say aluminum because it can be recycled others on my team say brass.

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full form of sn

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When a spring is cut into two, stiffness becomes ?

0 Answers   NIC,

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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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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 turbineblades etc. When both are used in the lost-wax method?

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Which material is used to made up of electrodes of resistance welding?

0 Answers   NIC,

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Is it possible to use metallurgical inverted microscope to other designation?

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we have many gas turbine blades, during the shot blasting process some of shots entrapeed in the cooling hole of blades..how can we remove the shots entrapped in holes????

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Explain vacuum induction melting?

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