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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Define what is the melting point of e70 steel, 304,308,316 stainless steels? In addition, define what is the hottest part of the flame in a fire?

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

0 Answers   NIC,

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What is calibration of an instrument?

0 Answers   Essar,

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Define what metal cord transfers electricity?

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What are allotropes? What are the allotropes of iron and carbon?

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full form of sn

6 Answers  

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

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What is hot working of metals? Give some of its principal methods.

0 Answers   Essar,

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what is the strongest metal?

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How would a salt and water solution clean a penny but a vinegar and salt solution will not clean a penny? What is the cause of this?

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What is the melting point of brass?

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