What does allotropic mean?

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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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what is meant by hardening ability of metals?

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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?

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Define what is the difference between diagrams of it and ct in heat treatment of steels?

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

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i want to go to US for Bachlore of computer science, I didn't appeared for SAT. my ielts scores are too low only 5.5 band and I am confused if VISA OFFICERS will ask why u hadn't given SAT. what i have to answer pl suggest?

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What is the usgae of angle plate ?

0 Answers   Essar,

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Why we are doing post heating in alloy steel welding?

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How much gold concentration should be in the organic phase (dbc) before reduction by oxalic acid solution? Is it effective on purity of gold in reduction step? Define what is the ratio of dbc to oxalic acid solution in this step?

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what is a type of graphite in cast iron?

3 Answers   Balaji, Sail,

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Can you explain the refrigeration cycle?

0 Answers   Essar,

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