Wow... Shocked at difference between DOM and HREW...

[Zeus33rd]

Shocked at how much harder it is to bend the DOM!

A buddy of mine has been helping me build the exo for my truggy. Well, more like he's building it and I do all the bitch work... One of these days I'll get my own bender and learn myself. Anyways, a few months ago we bent up the front part of the truck with HREW. Just what you see in this picture-

I just bought 200' of 1.75x.120 wall DOM to finish the rest of it. Past few days have been spent bending and fabbing it up. I'd say the DOM is twice as hard or more, to bend than the hrew...I'm now a believer of the the DOM being so much stronger than the hrew... I always had a hard time believing that the differences were so big. My arms, legs, back, chest and pretty much every other muscle in my body are screaming from the abuse I've put them through while bending this stuff. Even with an 8' cheater on the bender handle it's hard work. Or maybe I'm just a puss....

 

[3rdshiftdesign]

should we call the wambulance?

 

[gotmud77]

What did you pay for the dom? per foot

 

[darkshadow]

lots lots and lots!!!

and suckit up you would hurt more if you get crush in you truck with no cage

wambulance

 

[FRIZZLEFRY]

What did you pay for the dom? per foot

I think he paid $3 somethin a foot for it.

 

[Zeus33rd]

should we call the wambulance?

Should you eat a dick?

The point to this post was to point out the difference between the two types of tube. Not to complain about anything. I'm not gonna try to explain it any further, because I don't think you'd get it.


I paid $3.07/ft for it. Bought it from Team Tube in West Sacremento. Pictures in a week or so.

 

[darkshadow]

A WEEK!?!?!?!

come ON how bout a sneek peek?

 

[dave_90_blazer]

what daimeter are you using?

 

[jarheadk5]

Look a little closer:

...200' of 1.75x.120 wall DOM

 

[tRustyK5]

It depends more on the grade of DOM you got than anything. Sounds like you got 1018 or better...

Get the mill certs with the tube?

Rene

 

[tomseviltwin]

should we call the wambulance?

Is that you Timmay?

 

[k5-newbie]

Is that you Timmay?

LOL

 

[Ryan B.]

sweet dude. i wanna see pics of the progres..

btw, thats a cherry first gen in the background of your picture.

 

[Zeus33rd]

A WEEK!?!?!?!

come ON how bout a sneek peek?

Well, I'll try to remember to grab some pictures in the next day or two. I don't get to work on it as much as I would like... My bud has joint custody of his kid so when can only work on it when he doesn't have her and after he gets off work. Thats why it's takin so long.

It depends more on the grade of DOM you got than anything. Sounds like you got 1018 or better...

No mill certs. It was loaded on my trailer just like you see here-

It would be interesting to find out the type. I'll give them a call Monday and ask.

btw, thats a cherry first gen in the background of your picture

A rode hard and put away wet cherry.

 

[Zeus33rd]

Found out that it's 1025 DOM. Just read the markings on the steel itself.

I guess that would explain how hard it is to bend.

 

[JK5]

Hey...if you think the 1.75 is hard to bend..
try 2"x.125 DOM....I have a 6' bar attached to my bender.

 

[rcurrier44]

I guess that would explain how hard it is to bend.

ASTM A 53-A (Black Pipe) 30,000 Yield 48,000 Tensile
1020 HREW 38,000 Yield 52,000 Tensile
1020 DOM 60,000 Yield 70,000 Tensile


Don't have info on the 1025 DOM around but it might just be that twice as strong as the HREW you had.... Thats why HREW and Pipe cages have to be larger material than DOM....

But the strenght of a structure is much more complicated when you start looking at the real hard materials...when they get real hard you have to start worrying about cracking and brittle fracture....

 

[ntsqd]

Wouldn't worry about it developing brittle HAZ's like 4130 does.

Some info on the alloy in cold drawn form: Matweb

Matweb's numbers disagree with the UTS of 1020 being 70 ksi. Could be that the additional cold working in making DOM is the difference. Always best to err on the low side though.