Drawn Over Mandrel Tubing - DOM Tubing Supplier

Drawn Over Mandrel (DOM) Round Mechanical Tubing is made from 1020/1026 electric resistance welded tubing that is cold drawn, with all the flash removed before the drawing process. This results in more precise outer and inner diameter tolerances compared to other tubing types and ensures maximum weld strength. Solitaire Overseas has been supplying high-quality DOM Mechanical Tubing for over 35 years, known for its reliability and precision.

The manufacturing process of Dom Material (DOM) Tubing starts with slitting coils of steel to the correct width for the desired tube size. The steel is then cold-formed into a tube, and the edges are joined using an electric resistance welder (ERW) under pressure. After welding, the tube is cut to length and cleaned. It is then annealed by heating and cooling it slowly, which improves its toughness by relieving internal stresses. The final step involves drawing the tube over mandrels through precision dies, which thins the walls and reduces the diameter to meet the required specifications.

Benefits of Drawn Over Mandrel (DOM) Tubing

Enhanced Strength	DOM tubing offers higher yield and tensile strengths, providing durability and performance while maintaining precise wall thickness and consistent outer and inner diameters.
Smooth Surface Finish	The manufacturing process results in a smooth, clean surface, free of oxides and scale, with the weld seam completely removed.
Versatility in Sizes	DOM tubing is available in a wide range of sizes and wall thicknesses, making it suitable for various applications.
Easy Machining	DOM tubing requires minimal additional processing, making it easy to machine and saving time and costs in downstream processes.

Drawn over mandrel (DOM) Specifications

Material	DOM tubing is typically made from 1020, 1026, or ST52.3 steel.
ASTM	DOM tubing meets ASTM A513 Type 5.
Size	DOM tubing is available in a range of sizes, from 3/16 in to 14 in OD, and wall thicknesses from .028 in to .625 in.
Length	DOM tubing is usually stocked in random lengths of 17 ft to 24 ft.
Custom sizes	Custom sizes are available upon request.
Weld line	The weld line on DOM tubing is nearly undetectable, giving it a seamless appearance.
Surface quality	The OD and ID surfaces of DOM tubing are smooth and dense, with no trace of the weld.
Machinability	DOM tubing is easy to machine, form, cut, and weld.

Capabilities of Dom Material

Outer Diameter	Wall
0.750 – 12.000"	0.049 – 0.670"

Size capability may vary by specification and facility. Please inquire for more specific information.

Dom Tubing Grades

Type or spec	Grade
Carbon grades	1008 - 1045, ST52.3 or E355
HSLA grades
Alloy grades	4118/4130/8620

Applications of Drawn Over Mandrel (DOM) Tubing

Thanks to its strength and precision, DOM tubing is ideal for demanding applications that involve high internal pressure, rotation, or repeated stress. Some key uses include:

Hydraulic cylinders – for reliable performance under high pressure.

Motorcycle frames and forks – providing strength and stability.

Bearings and bushings – ensuring smooth operation with minimal wear.

Auto and truck components – offering durability and precision.

Race car frames – built for lightweight strength and safety.

Agricultural equipment – used in both light and heavy-duty machinery.

Recreational vehicles – for sturdy, long-lasting frames.

Mining equipment – capable of withstanding tough, harsh environments.

DOM tubing is the go-to choice for applications requiring superior strength and precise dimensions.

FAQ

Drawn Over Mandrel (DOM) Round Mechanical Tubing is a cold-drawn 1020/1026 electric resistance welded tube with the flash removed before cold drawing. It offers precise OD and ID tolerances and superior weld strength compared to other tubing types.

Drawn Over Mandrel (DOM) tubing is a cold-drawn 1020/1026 electric resistance welded tube where the flash is removed before cold drawing. It has tighter OD and ID tolerances than traditional welded tubing.

In manufacturing, DOM stands for Drawn Over Mandrel. It refers to a process where electric resistance welded steel tubing is cold drawn through dies and over mandrels to achieve precise dimensions and improved mechanical properties.