What is drawn over Mandrel (DOM) steel tubing?

Drawn Over Mandrel (DOM) steel tubing undergoes a specialized manufacturing process where seamless steel tubes are cold-drawn over a mandrel, resulting in precise dimensions, enhanced mechanical properties, and a smooth surface finish. This process ensures uniform wall thickness and improved strength, making DOM tubing ideal for applications requiring high-performance mechanical components such as hydraulic cylinders, automotive parts, and structural frameworks.

Drawn Over Mandrel Steel Tubing Material Grade:

DOM steel tubing is commonly made from low-carbon or alloy steel. The specific material grade can vary based on the application requirements and manufacturer specifications. Some common material grades used for DOM steel tubing include:

1. 1010 Steel

2. 1018 Steel

3. 1020 Steel

4. 1026 Steel

5. 4130 Steel

6. 4140 Steel

Drawn Over Mandrel Steel Tubing Chemical Composition:

Drawn Over Mandrel Steel Tubing Mechanical Properties:

Drawn Over Mandrel Steel Tubing  Produce Standard

ASTM A513/A513M - Standard Specification for Electric-Resistance-Welded Carbon and Alloy Steel Mechanical Tubing

ASTM A519/A519M - Standard Specification for Seamless Carbon and Alloy Steel Mechanical Tubing

EN 10305-2 - Steel tubes for precision applications - Technical delivery conditions - Part 2: Welded cold-drawn tubes

JIS G3445 - Carbon Steel Tubes for Machine Structural Purposes

DIN 2393-2 - Welded precision steel tubes - Part 2: Technical delivery conditions

SAE J524 - Seamless Low-Carbon Steel Tubing Annealed for Bending and Flaring. This standard specifies seamless cold-drawn and annealed low-carbon steel tubing for use in bending, flaring, and other similar applications. DOM steel tubing often conforms to the requirements of this standard.

Drawn Over Mandrel Steel Tubing Delivery Condition:

DOM steel tubing is typically delivered in the cold-drawn and annealed condition. It is ready for further processing or direct use in applications.

Drawn Over Mandrel Steel Tubing Permissible Variations in Dimensions:

The permissible variations in dimensions for DOM steel tubing depend on the applicable standards and manufacturer specifications. Generally, these variations include tolerances for outside diameter, inside diameter, wall thickness, and length.

Drawn Over Mandrel Steel Tubing Surface Treatment:

DOM steel tubing is typically supplied with a smooth, clean surface. However, additional surface treatments can be applied based on specific requirements, such as galvanizing, painting, or coating.

Drawn Over Mandrel Steel Tubing Advantages:

1. Enhanced Mechanical Properties: DOM steel tubing offers improved mechanical properties compared to standard welded or seamless tubes, including higher tensile and yield strengths.

2. Dimensional Accuracy: The manufacturing process ensures precise dimensions, providing tighter tolerances and consistent tube sizes.

3. Uniformity: DOM tubing exhibits uniform wall thickness and eliminates issues like seam weld defects found in welded tubes.

4. Excellent Surface Finish: DOM tubing has a smooth surface finish, suitable for applications that require superior aesthetics or reduced friction.

5. Improved Machinability: The cold-drawn process enhances the machinability of DOM steel tubing, allowing for easier fabrication and customization.

Drawn Over Mandrel Steel Tubing Applications:

DOM steel tubing finds applications in various industries, including:

- Automotive and transportation: Suspension components, chassis, roll cages.

- Machinery and equipment: Hydraulic cylinders, agricultural machinery, construction equipment.

- Industrial and manufacturing: Conveyor systems, structural supports, material handling equipment.

- Sporting goods: Bicycle frames, exercise equipment, recreational vehicles.

Drawn Over Mandrel Steel Tubing