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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Is it possible to determine the heat treatment condition in stainless steel (astm a 479 gr xm-19) by checking the microstructure?

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What is the help of crowning on pulleys

0 Answers   NIC,

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How much gold is in a troy ounce?

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What is the composition of d2?

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Discuss about advatages and limitations of powder metallurgy.

0 Answers   John Deere,

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What special precautions need to be employed if a powder metallurgy route is chosen?

1 Answers  

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How much gold concentration should be in the organic phase (dbc) before reduction by oxalic acid solution?

0 Answers  

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What is mean by D2 Material used for Die tooling? What are the composition in that?

1 Answers  

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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?

0 Answers  

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What is material of is 1968 and what is its modulus of elasticity.

2 Answers   L&T,

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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????

1 Answers  

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