|
Re: CREW 1.75" x .120wall tubing, Cage?
[Re: GoodysGotaCuda]
#623754
02/25/10 07:53 AM
02/25/10 07:53 AM
|
Joined: Dec 2003
Posts: 22,696 Bitopia
jcc
If you can't dazzle em with diamonds..
|
If you can't dazzle em with diamonds..
Joined: Dec 2003
Posts: 22,696
Bitopia
|
I thought the main issue is if the wall thickness goes to .119", where DOM is more precise.
Reality check, that half the population is smarter then 50% of the people and it's a constantly contested fact.
|
|
|
Re: CREW 1.75" x .120wall tubing, Cage?
[Re: JERICOGTX]
#623756
02/25/10 09:59 PM
02/25/10 09:59 PM
|
Joined: Jun 2005
Posts: 6,257 gulfport, ms, west mi
rowin4
master
|
master
Joined: Jun 2005
Posts: 6,257
gulfport, ms, west mi
|
Isn't [ crew ] just black iron pipe? Been used back in the day before mild steel tubing and c/m to build roll bars, can't see a benefit now as the price isn't any lower.
it's ok to butt heads, just don't do it with a butthead
|
|
|
Re: CREW 1.75" x .120wall tubing, Cage?
[Re: rowin4]
#623757
02/25/10 10:47 PM
02/25/10 10:47 PM
|
Joined: Dec 2005
Posts: 11,566 Fulton County, PA
CMcAllister
Mr. Helpful
|
Mr. Helpful
Joined: Dec 2005
Posts: 11,566
Fulton County, PA
|
Cold Rolled Electric Weld (CREW) tubing is considered mild steel as is DOM, but it is not the same. The welded seam tubing is not very accurate as far as tolerances are concerned. I have seen .120 wall stuff as thin as .113 or .114. This is the reason places who use this tubing go to .134 wall. That will sometimes run to .128 to .129 thick, still legal for cages and bars. It is also heavy. DOM is Drawn Over Mandrel and is much more accurate. You can use .120 wall material and still satisfy the .118 minimum thickness requirement. Also, the DOM I have seen has all been 1020 steel where the welded stuff has all been 1010. This means the DOM has a higher carbon content which makes the steel harder. This makes for a stiffer cage assembly. I can tell the difference running a drill bit through it. Both of these are considered mild steel, but the DOM is higher quality material and as a result is more expensive than CREW or ERW. When you talk to someone about mild steel tubing, make sure you know if it is welded seam or DOM, which is seamless. Personally, I wouldn't use welded seam tubing for anything on a race car.
If the results don't match the theory, change the theory.
|
|
|
|
|
|