DOM Steel vs. Seam-Welded Mild Steel For Cages
Posted by Jmerrell on Nov 7th 2025
? DOM Steel vs. Seam-Welded Mild Steel: Why Strength Matters for UTV Roll Cages
When it comes to building a UTV roll cage, not all steel is created equal. At UTV Wolfpack, we use DOM steel (Drawn Over Mandrel) for every cage component because it delivers superior strength, precision, and safety where it counts most.
? What Is DOM Steel?
DOM tubing starts as welded mild steel, but it’s then cold-drawn through a die and over a mandrel. This process:
-
Removes the internal weld seam
-
Refines the grain structure
-
Increases tensile strength and hardness
-
Produces consistent wall thickness and tighter tolerances
The result? A tube that behaves like seamless steel, with no weak points and higher impact resistance — perfect for high-stress off-road applications.
⚙️ Strength Comparison
| Property | DOM Steel | Seam-Welded Mild Steel |
|---|---|---|
| Seam Integrity | Seamless (no weak points) | Visible weld seam – potential failure point |
| Tensile Strength | ~85,000–90,000 psi | ~45,000–55,000 psi |
| Yield Strength | ~70,000 psi | ~35,000 psi |
| Impact Resistance | Excellent | Fair |
| Fatigue Life | Long-lasting | Prone to cracking at weld seam |
| Dimensional Tolerance | Tight and consistent | Variable |
?️ Why We Use DOM for UTV Roll Cages
-
Safety First: Seamless strength and superior energy absorption during rollovers.
-
Precision Fit: Tighter tolerances mean better weld joints and cleaner fabrication.
-
Performance Tested: Meets or exceeds SCORE, NHRA, and FIA roll cage standards.
-
Off-Road Proven: Built to handle the pounding of dunes, rocks, and desert racing.
At UTV Wolfpack, our DOM steel roll cages are engineered for riders who demand race-ready strength and durability.