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 Categories >> Engineering >> Metallurgy
 
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Question Asked @ Answers Views     Select
Why same casting has different hardness and machineability properties? One spot it is found hard for machining and another spot soft? It is FG 260 grade for Cast Iron.    4  4481
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?    0  599
any input on how to spec out(if possible) a larger grain structure(3/8" or larger) on a Al 6061 forging material. novellus   0  578
I currently use 17-7 PH stainless which is hardened to condition CH after forming. raw matl is .1.75"X .12" X .008". Its main usage after hardening is silicon wafer retainer where it's contantly cycled up and down to putin and remove wafer after 40-60 sec process at 400C temp. At this high temperature this part seemed to deform after a a couple of hundred wafer which is what it was designed for in the first place. THere is a proposal to go to a different material to increase lifeline of this part. My question is..... can 321 SST be a plugin replacement. I know this has a higher temp rating but how about its forming characteristics, will it have spring properties, and wont become brittle after prolonged exposure to 400C. novellus   0  737
what are the ores of copper?    4  2144
i m going to give an interview for iocl on 5th aug . pls tell me what questions can be answered from metallurgical prospect iocl   0  1274
What metal would be better suited for heat transfer, reliability, and cost...??? I'm currently using Aluminum for a 'hot-wedge'.    3  1937
Please send me the comparision of Mils Steel Specification as per BS EN 10130 & IS 2062    1  1503
what happens when a EM wave is transmitted    1  2318
what is the cause of attenuation due to powerloss    1  1807
What are the superalloys used for?    2  2048
What are the superalloys?    3  4521
Why is non-destructive testing necessary?    9  6150
What kinds of NDT methods are available?    9  7126
What kind of components are fabricated from the superalloys, and what are their roles?    2  1303
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Why do some of the latest 'single crystal' superalloys contain concentrations of the grain boundary strengthening elements, e.g. carbon and boron? 484
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 48
what is wedge load test method . what is offset method . 124
i need manual solution of diffusion in solid(shewmon) if you have plz send for me. tank you my email : alloymail@gmail.com 2135
I currently use 17-7 PH stainless which is hardened to condition CH after forming. raw matl is .1.75"X .12" X .008". Its main usage after hardening is silicon wafer retainer where it's contantly cycled up and down to putin and remove wafer after 40-60 sec process at 400C temp. At this high temperature this part seemed to deform after a a couple of hundred wafer which is what it was designed for in the first place. THere is a proposal to go to a different material to increase lifeline of this part. My question is..... can 321 SST be a plugin replacement. I know this has a higher temp rating but how about its forming characteristics, will it have spring properties, and wont become brittle after prolonged exposure to 400C. 737
Any body know when the medicals are starting for the BSI P.O , if anybody got any call letter please let me know 459
white rust formation over zinc plated and passivated fasteners during CED coating. WHY? 2414
what is No.1 Laathing Scrap Bundle ( Mill Scrap ) 629
What is the difference between DI pipes, Cast Iron pipes, LA Pipes, SW pipes, SWR Pipes, RCC hume pipe, RCC spun pipe ? What are their IS codes and applications ? 1989
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? 599
What are the chemical composition of cast iron grade 20 130
WHAT IS THE ACTUAL DEFINATION OF PLANET? 1995
1)We are using OHNS material for manufacturing Thread & plain Gauges.What is the excat composition of OHNS for Gauges? 2)Which is the reference standard book for OHNS Material composition for Gauges? 2519
any input on how to spec out(if possible) a larger grain structure(3/8" or larger) on a Al 6061 forging material. 578
what are the causes of scaling in cast iron, after subjecting it to annealing process. 834
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