Travis Schultz wrote:
Hopefully you have already noticed OnlineMetals.com offers a wide selection of sizes A513 Type 5 DOM tubing (http://www.onlinemetals.com/merchant.cfm?id=283&step=2&top_cat=197).
So what the heck is it, and why can’t we just call it steel tube without all the fancy jargon? Let me explain…
D.O.M – Document Object Model, Dominican Republic, Dead Organic Matter? All of these would be good educated guesses but not what the term applies to in the steel industry.
DOM, or “drawn over mandrel”, is a cold-worked process that is applied to the tube after it is constructed giving the tube a smoother finish, more exact dimensions and higher strength and hardness. These qualities make this tubing a favorite amongst automotive/motorcycle fabrication and off-road enthusiasts; as I understand it makes a mean roll cage.
The Type 5 in the title is really just a verification that yes the tube has been drawn over mandrel and the A513 is the ASTM spec it meets.
That’s the scoop on the A513 Type 5DOM tube we offer, check out all our sizes from .25” OD X .035” wall up to 4” OD X .083” wall, ready to be cut to size and shipped out, and please let us know about any special requests on different sizes you may have.
Written by Travis Schultz











