Can you educate me on tubing?

[06RangerXLT]

im going to fab a bumper for my truck. only thing is tubing lingo is rather french to me. i know ID and OD, but i have no idea what tubing would work for a bumper.

im thinking id use inch and a quarter or inch and a half OD. what do you guys think?

 

[railman]

DOM = Drawn Over Mandrel....molten metal is pushed through a die so the tube is uniform in strength...expensive...I personally would only use it in a roll-cage, steering linkages, or suspension links...

HREW = Hot Rolled Electrically Welded....starts out as a flat piece and is formed and welded....not as expensive...perfect for bumpers and sliders and such...always place the seam to the inside of the bend if at all possible ( hard to do with compound bends )...

.120 wall is good for most things....prefer .250 wall for sliders, links, and other high stress pieces....

l8r, John

 

[4.0B2]

railman pretty much hit it on the head. DOM is expensive... on a bumper, i wouldn't spend the money for it!

 

[NMB2]

I use crew and hrew for most cage/bumper/slider style stuff.

 

[06RangerXLT]

ok cool! ill post pictures once i figure out what im doing. im working with an idea i got from another members bumper on another fourm. i dont want to replicate it, just refine it for my likings.

thanks guys!

 

[4x4junkie]

DOM = Drawn Over Mandrel....molten metal is pushed through a die so the tube is uniform in strength...expensive...I personally would only use it in a roll-cage, steering linkages, or suspension links...

HREW = Hot Rolled Electrically Welded....starts out as a flat piece and is formed and welded....not as expensive...perfect for bumpers and sliders and such...always place the seam to the inside of the bend if at all possible ( hard to do with compound bends )...

.120 wall is good for most things....prefer .250 wall for sliders, links, and other high stress pieces....

l8r, John

I do believe DOM starts out the same as HREW (flat strip formed into a circle then welded), it's then drawn over the mandrel to work harden it which eliminates the raised weld seam in the process (DOM is NOT the same thing as "seamless" tubing). DOM is typically made from higher-carbon steel than HREW, which also gives it more strength.

Agreed, HREW is fine for bumpers, sliders, etc. where occupant protection or safety isn't relying on it directly (as opposed to roll cages, suspension/steering links, etc.).

 

[Bennybooster]

This is what 140 ft of DOM looks like,

Don't be jealous

 

[06RangerXLT]

dick.

thanks for the info guys!

 

[railman]

This is what 140 ft of DOM looks like,

Don't be jealous

what is there to be jealous of....it's just a pile of steel.....













































































l8r, John

 

[killj0y]

rofl

 

[DPoffroad]

I do believe DOM starts out the same as HREW (flat strip formed into a circle then welded), it's then drawn over the mandrel to work harden it which eliminates the raised weld seam in the process (DOM is NOT the same thing as "seamless" tubing). DOM is typically made from higher-carbon steel than HREW, which also gives it more strength.

Agreed, HREW is fine for bumpers, sliders, etc. where occupant protection or safety isn't relying on it directly (as opposed to roll cages, suspension/steering links, etc.).

TRUE! but DOM is made out of the same steel as every other regular steel tubing! Its stronger because when its "cold worked" it tightens the molecular structure of the steel

 

[nb11]

DOM = Drawn Over Mandrel....molten metal is pushed through a die so the tube is uniform in strength...expensive...I personally would only use it in a roll-cage, steering linkages, or suspension links...

HREW = Hot Rolled Electrically Welded....starts out as a flat piece and is formed and welded....not as expensive...perfect for bumpers and sliders and such...always place the seam to the inside of the bend if at all possible ( hard to do with compound bends )...

.120 wall is good for most things....prefer .250 wall for sliders, links, and other high stress pieces....

l8r, John

Good info! Sticky?