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Old 10-19-2010, 11:44 AM
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Stainless Steel tubular A arms...???

Anyone has ever made A arms out of schedule 40 304 stainless steel tubes?

I want them for my dune buggie, I was to make them out of mild steel but I think it would look great if made of stainless steel.

please comment.

Augusto.

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Old 10-19-2010, 01:07 PM
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I believe the type 304 is mostly for decorative purpose..fine for a bumper or firewall..the 1018 mild steel is better to use for your a arms..

Sam
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Old 10-19-2010, 01:26 PM
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actually 304 is very strong, much stronger than 1018 and does not brittle when welded like the high strength cromoly, this is why I'm considering it, but I may be wrong.
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Old 10-29-2010, 02:58 AM
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I have polished SS tubular A-arms on my '32 TCI chassis. They have been using them for a long time...don't know which SS though.
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Old 10-29-2010, 06:00 AM
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SCH 40 is not tube, it is pipe. Both are available seamless or welded. All 4 varieties have roughly the same strength. I think the tube would be easier to finish. While the pipe may look smooth, when you start to polish it you will probably see "orange peel" from the manufacturing method. I am assuming you probably have some 304 SCH 40 pipe already. I think you would be happier with tube. Just my $0.02.
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Old 10-29-2010, 11:54 AM
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SS tublar A Arms

Quote:
Originally Posted by redsdad
SCH 40 is not tube, it is pipe. Both are available seamless or welded. All 4 varieties have roughly the same strength. I think the tube would be easier to finish. While the pipe may look smooth, when you start to polish it you will probably see "orange peel" from the manufacturing method. I am assuming you probably have some 304 SCH 40 pipe already. I think you would be happier with tube. Just my $0.02.
redsdad is right it is pipe, which could have a ridge on it. 302 or 304 are tough SS you don't consider most SS hard, it is really gummy but very tough. that's what makes it harder to turn than other metals, 416 SS is harder than 302, 304, and easier to turn. 416 is also magnetic. one of the strongest, use on aircraft a lot, is 17-4 ph, ph stands for precipitating hardness. It would be the best, but it does not give a shine like the 302-304. and hard to work with. 303 would be a little to soft, I don't think it would take the hitting of bumps or the like. 302-304 is used in the medical instruments world, along with aircraft.

35terraplane
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Old 10-29-2010, 01:46 PM
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These are TCI and supposed to be 304L:




http://www.aksteel.com/pdf/markets_p...Data_Sheet.pdf

Dave W
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Old 10-29-2010, 02:05 PM
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400 series stainless gets brittle when welded.

304 stainless with 308 rod TIG welded is very strong.

I have some pics below of my upper arms.
I believe I used sch 80 1-1/2" type 304 pipe.
The inside is going to warp like crazy when you weld it so it will need to be reamed.

Edit: The sleeves are sch pipe. The arms are 1/8 wall tubing.
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