How can i tell if exhaust pipe is stainless?
12-17-2006, 12:59 AM
#31
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Re: How can i tell if exhaust pipe is stainless?
Originally Posted by Engloid
I think you mean "gravitational pull = magnetic field"
We're all magnetic and the magnetism of the earth pulls us towards it. Likewise, water is magnetic...which is the thing that causes droplets to attract to each other and become one (when they touch or become very close).
We're all magnetic and the magnetism of the earth pulls us towards it. Likewise, water is magnetic...which is the thing that causes droplets to attract to each other and become one (when they touch or become very close).
You have great welding skills and knowledge, but not so much on physics.
Originally Posted by Engloid
"gravitational pull = magnetic field"
All objects exhibit gravity because of mass. Not all objects have a magnetic field.
12-17-2006, 12:59 AM
#32
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Re: How can i tell if exhaust pipe is stainless?
the addition of nickel is primarily what changes the atomic structure of stainless steel to be non-magnetic, structurally, even though it still has iron. much like lead and radiation, with enough lead there is no radiation leak-through
12-17-2006, 01:59 AM
#33
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Re: How can i tell if exhaust pipe is stainless?
Originally Posted by MADMAX
You have great welding skills and knowledge, but not so much on physics.
This statement is completely incorrect. Magnetism and gravity are two different phenomina.
All objects exhibit gravity because of mass. Not all objects have a magnetic field.
Maybe your misinterpreting my post. Gravity is the effect of the Earth's magnetic energy... pulling everything towards its center. Granted, that effect can be overcome by a "magnet" at times, yet is always there. Of course mass has a lot to do with it...and is why it's harder to pick up a 20lb weight than a 5lb one.
12-17-2006, 02:45 AM
#34
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Re: How can i tell if exhaust pipe is stainless?
Originally Posted by Engloid
Are you saying that gravity is not the effect of magnetism? If so, what is it that pulls things to the earth?
Maybe your misinterpreting my post. Gravity is the effect of the Earth's magnetic energy... pulling everything towards its center. Granted, that effect can be overcome by a "magnet" at times, yet is always there. Of course mass has a lot to do with it...and is why it's harder to pick up a 20lb weight than a 5lb one.
Maybe your misinterpreting my post. Gravity is the effect of the Earth's magnetic energy... pulling everything towards its center. Granted, that effect can be overcome by a "magnet" at times, yet is always there. Of course mass has a lot to do with it...and is why it's harder to pick up a 20lb weight than a 5lb one.
Gravity and Magnetism are not the same thing. And yes, gravity is not because of magnetism.
Physics 101
Gravity is the effect of the earth's mass and has nothing to do with the earth's magnetic field. Mass is the only thing that gravity has to do with.
The mass of an object determines the objects gravitational field strength. The reason why a 20lb weight is harder to pick up than a 5lb weight is because the combined gravitational force is higher for the 20lb mass and earth vs the 5lb mass and the earth.
This equation shows the gravitational force between two objects:
F = ( G * M1 * M2 ) / ( r^3) ; G = gravitaional constant, M1 = mass of object 1, M2 = mass of object 2, r = distance between the objects.
Simply the fact that if either of the masses increase, then the graviational force between the two objects increase.
12-17-2006, 03:48 AM
#36
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Re: How can i tell if exhaust pipe is stainless?
Originally Posted by weiRtech
anyone who relies on google for their education is a tard. :1
Originally Posted by http://www.azom.com/details.asp?ArticleID=1234
Nitric Acid Reaction
Stainless steels from non-stainless steels.
1. Place a piece of the steel in strong nitric acid (20% to 50%) at room temperature, or a drop of the acid on a cleaned surface of the steel.
2. Test standard samples in the same way, ie stainless and non-stainless steel samples.
3. Non-stainless steels will quickly be attacked, a pungent brown fume is produced. Stainless steels are not affected. Compare result with standards.
4. Wash samples thoroughly afterwards
Stainless steels from non-stainless steels.
1. Place a piece of the steel in strong nitric acid (20% to 50%) at room temperature, or a drop of the acid on a cleaned surface of the steel.
2. Test standard samples in the same way, ie stainless and non-stainless steel samples.
3. Non-stainless steels will quickly be attacked, a pungent brown fume is produced. Stainless steels are not affected. Compare result with standards.
4. Wash samples thoroughly afterwards
Magnetic Response
Austenitic (300 Series) stainless steels from other steels. All other steels are attracted to a magnet, including the ferritic, duplex, martensitic and precipitation hardening stainless steels. The only other non-magnetic steels are the austenitic manganese steels (eg “P8”).
Note response, if any, when a permanent magnet is brought close to the steel.
Some austenitic grades, particularly 304, are attracted when cold worked, eg by bending, forming or rolling. Stress relieving at cherry-red heat will remove this response due to cold work. This stress relief may sensitise the steel and should not be performed on an item which is later to be used in a corrosive environment. A full anneal is acceptable, however.
12-17-2006, 01:23 PM
#39
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Join Date: Apr 2006
Posts: 676
Re: How can i tell if exhaust pipe is stainless?
BigWheeze, are you literate? Seriously, no one claimed stainless steel wasn't magnetic. The claim is 300 series stainless steel is not magnetic. I'd venture to say 99% of stainless steel exhausts made is 300 series stainless steel. A small magnetic attraction is not magnetic. Stick a magnet on some steel you have laying around. The attraction will be obvious. Now do the same with some 300 series stainless laying around. If there is an attraction, it will be so weak it might as well not be an attraction. Do some calculations in the science/engineering world. If one number is significantly smaller than the other to the point where the comparison is not being worth made, its concidered a non factor. In this case 300 series stainless steel's attraction is a non factor. It is too small to concider magnetic. Thus making the magnetic test more than fair and the best test in this situation.
