 Roll cage..Cromoly or steel? |
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 Dec 13 2004, 02:18 PM
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#1
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Member  Group: Advanced Members Posts: 75 Joined: 20-June 04 Member No.: 370  |
Which is better?
Is it worth the extra $ to get Cromoly or is the only diff weight savings? I have also heard that Cromoly requires special preparation such as pre heating etc, that should only be don eby experienced persons. vs mild steel which is easier to work with and just as strong, but heavier. Any input? |
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Dec 13 2004, 04:11 PM
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#2
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Veteran Member Group: Member Posts: 2,688 Joined: 23-December 03 From: Ft Worth, TX Member No.: 8 |
mild steel DOM is around $6 per foot. C/M steel is like $18 per foot. C/M is not lighter, just stronger, so you can use a thinner tube. NASA reqiuers .120" wall M/S and .095" C/M steel as an example.
C/M is suposed to be TIG welded, and can be MIG welded, but it takes a very special process of preheating the tube and using heat to bring down the temp after the welding. @ $18 per foot, if you can afford that, you can have it TIG'ed. it really depends on your goal w/ the car. FYI, the NASA CMC class prohibits the use of C/M for cost reasons. |
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Posts in this topic
brannanjohn Roll cage..Cromoly or steel? Dec 13 2004, 02:18 PM
brannanjohn thanks. I did not realize it was banned from CMC.... Dec 13 2004, 04:50 PM Glenn98ZM6 banned in not a good word. its leagal to use for N... Dec 13 2004, 08:07 PM brannanjohn The more that I think about, I think I will use mo... Dec 13 2004, 08:43 PM PeteL Although chrome-molybenum alloy steel SAE 4130 can... Dec 13 2004, 11:20 PM
brannanjohn thanks all. Looks like I am going withthe mild st... Dec 14 2004, 02:59 AM |
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