Tube spec's

[OldTruck38]

Where's the steel guys? Fabricators?
I need information on steel tube for bumper, sliders, etc. I buy tube, buddy does the work (I get to watch & sweep shop) kinda' thing.
CREW = cold roll electrical resistance welded seam
HREW = hot roll electrical resistance welded seam
DOM = drawn over mandrel

For the money . . . what's the difference in CREW & HREW when it comes to sliders &/or bumper fabrications?
Which one bends best & has better properties?

Yes, I know DOM is probably the best of the three, but I'm currently working with a non-trophy truck, so . . . I'm budget minded.

thax in advance
OldTruck

 

[Cirbo]

Weekend fabricator here, so take anything said with a grain of salt.

CREW and HREW are cold/hot rolled electric welded. I don't think you would want to try to work with anything cold rolled, as it just don't bend very well (without taking the temper out). HREW would be what you are looking for.

 

[malcb]

Interested in this thread, I have searched before and couldn't find much.

In the UK the specs will be different but I am looking at some steam tube for reasonable money, 1/8" inch thick seems to be ERW but is OK for roll cages in the UK so perhaps isn't - something to check.

Specification includes a bend test, 180 deg around a former with internal radius 6 times the diameter of tube, so 12" radius for 2" tube. My thinking is a) I don't want to weld onto less then 1/8" b) I don't want to buy different material for the cage use and sliders, etc.

 

[Tools R Us]

HREW = hot roll electrical resistance welded seam

Your basic tube, works well as long as properly sized for the job. Least expensive.

CREW = cold roll electrical resistance welded seam

Compared to hot rolled, it's stronger, straighter, has a smoother surface finish, nice stuff to work with. Middle of the road in cost, but can be relatively rare, so sometimes priced very close to DOM.

DOM = drawn over mandrel

The best among your choices for surface finish and tensile strength very nice to work with. Most expensive.

This simplifies it too much, there are alloy choices, etc in all types that can change the strength/cost. Pick your poison for the strength/cost ratio for the needs of your project.

 

[Mace]

this place has some .120 wall 1 5/8th wall stainless mandrel bends on a 1d radius...would be nice for some of what yer doing

Columbia River Mandrel Bending - Columbia River Mandrel Bending

stainless??

You are recommending that he makes a cage out of stainless??

 

[Tools R Us]

stainless??

You are recommending that he makes a cage out of stainless??

My guess would be SPAMMER. Just joined to pimp this link in a couple of threads.