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 advantage of different types of screw.

0 Answers   Essar,

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Which is stronger, tungsten or titanium?

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How is solution annealing carried out? Define what type of furnace is required? Does one need to be heat in a salt bath?

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Please send me the comparision of Mils Steel Specification as per BS EN 10130 & IS 2062

1 Answers  

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What is d2? What is it used for?

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white rust formation over zinc plated and passivated fasteners during CED coating. WHY?

1 Answers   Wheels India,

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what is widman statten structure?

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

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What is a master gauge ?

0 Answers   Essar,

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full form of sn

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Which method has more procity in cast part? Which method has more strength in cast part?

0 Answers  

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