expansion of materials


Postby simon.rowden » Thu Jun 04, 2009 4:59 pm

hi there could someone please tell me which material would expand the most in overall length if were heated to the same temperature.

10m of steel tube
10m of copper tube
10m of pvc gutte
10m of stainless steel tube

cheeers peeps
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Postby Steve the gas » Fri Jun 05, 2009 5:36 am

Hi again,

Rather than asking us questions as such,- what are you attempting to do?

We can then advise more confidently.
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Postby simon.rowden » Fri Jun 05, 2009 2:22 pm

steve the gas,sorry mate but your reply never came through only your name,if you get a second could you reply again.cheers mate
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Postby simon.rowden » Fri Jun 05, 2009 6:05 pm

sorry this is a question in test that i am doing,i have scoured my book and internet sources but to no avail. the same with the other question.
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Postby Steve the gas » Sat Jun 06, 2009 5:52 am

No probs,

All I said was - what are you attempting to do ?
So we can advise more clearly.
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Postby plumbbob » Sat Jun 06, 2009 12:55 pm

A quick check of Wikipedia searching for Coefficient of thermal expansion, gives a table of materials. The bigger the number the more it expands.
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Postby rosebery » Sat Jun 06, 2009 2:45 pm

You didn't google Coefficient of expansion

steel 7.3 x 10 -6 inches per inch per degree F

copper 9.3 x 10 -6 inches per inch per degree F

pvc 61.1 x 10 -6 inches per inch per degree F

austenitic stainless steel between 8.0 and 9.6 x 10 -6 inches per inch per degree F according to spec

ferritic stainless steel 5.5 x 10 -6 inches per inch per degree F according to spec

So the answer is ????????

Cheers
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Postby htg engineer » Sat Jun 06, 2009 9:47 pm

'this is a question in test that i am doing'

If it is a test, surely you will find out your answer once the test is complete ?

As Steve says - what are you attempting to do ?

I can understand comparing, steel, copper, stainless steel - tubes or pipe so why PVC gutter and not PVC/plastic pipe/tube ???

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Postby rosebery » Sun Jun 07, 2009 11:19 am

"I can understand comparing, steel, copper, stainless steel - tubes or pipe so why PVC gutter and not PVC/plastic pipe/tube ??? "

Because its a "properties of materials" question rather than an "application of materials" question perhaps? Must admit though the same thought crossed my mind when i first read it.

Cheers
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Postby simon.rowden » Mon Jun 08, 2009 1:31 pm

sorry that my english grammer is not to hot.when i said test i meant a multiple choice test not an actual hands on test.
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Postby htg engineer » Mon Jun 08, 2009 4:00 pm

'Because its a "properties of materials" question rather than an "application of materials" question perhaps?'

Fair enough, just wondered why he specified pipe, when he could of said Steel, Copper, PCV etc meaning it would be applicable to any process/application where the mentioned materials were used.

Just wondered what the 'test' was for, I assume it's more than just curiosity.

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Postby simon.rowden » Mon Jun 08, 2009 5:55 pm

yeh its for a fast track course.to further my knowledge in the property game.will probably do a spaks course too.need to get a certain of correct answers to allow me on to the next weeks practical course.
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