Answer / Rajendra Ram

Cast grade iron 35 typically contains about 3.5 to 4.5% carbon, with minor amounts of silicon, manganese, phosphorus, sulfur, and other elements. The exact composition can vary depending on the specific manufacturer or application.

Define 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 turbine blades etc. When both are used in the lost-wax method?

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A plain carbon steel contains 45 wt% of proeutectoid ferrite. Define what is its average carbon content in weight percent? I know that you need to use a tie line in the phase diagram, but my book does not really give a good example to go by

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How can you find out what kind of stainless steel was used in making a stainless object?

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

1 Answers   NIC,

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Why do the Gamma Prime and Gamma Double Prime phases play such an important role in promoting strength in the superalloys?

1 Answers  

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When a spring is cut into two, stiffness becomes ?

1 Answers   NIC,

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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

1 Answers   Leader Valves,

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Water hammer in pipes occur due to ?

1 Answers   NIC,

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Describe strain aging based on dislocation theory?

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carbon-3.23%,manganese-0.60%,silicon-2.25%,sulphur-0.086% phosphorus-0.122%,chromium-0.04%,nickel-0.10%, molybdenum-trace. WHAT IS THE GRADE OF THIS CAST IORN.

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acetylene is stored in ?

1 Answers   NIC,

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What are the superalloys?

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