Drawn-Over Mandrel
Drawn-Over Mandrel (DOM) mechanical steel tubing is manufactured from Electrical Resistance Welded (ERW) hollow tubing, additional processing by cold drawing through dies and over a mandrel, resulting in smooth and clean surface finish, mechanical properties and OD & ID dimensional accuracy.
Benefits
Benefits of using using Cold Drawn Welded tubing:
- Uniform grain structure and controlled hardness
- Uniform wall thickness with close OD and ID tolerances
- OD / Wall combinations that are not possible with traditional ERW tubes. i.e. low D/t (Outer diameter to wall thickness ratio)
- Greater size range availability compared to ERW tubes
- High tensile and yield strength
- Excellent machining characteristics
- Smooth and clean OD and ID surfaces
Applications & Sectors
Cold drawn welded and Cold drawn seamless tubing are commonly used in the following sectors / applications:
- Hydraulic cylinders & Telescopics
- Accumulators
- Axles
- Printing, textile and paper mills
- Spacers & Bushings
- Machined tubular parts
- Down Hole – PCP Pumps (Progressing Cavity Pumps)
- Steering Columns
- Shock Absorbers
- Drive Shafts
GRADES & SIZES
All of these products are available in long lengths & cut to size services:
- EN 10305-2 Steel Grade E355 + C | Size Range: 45 OD/35 ID to 115 OD /100 ID | Smooth Bore (Can also be known as ready to use / SSID tubing)
- EN 10305-2 Steel Grade E355 +SR | Size Range: 50 OD/40 ID to 190 OD /160 ID | Suitable for skiving tubing (Cold drawn welded)
- EN 10305-2 Steel Grade E355 + SR | Size Range: 50 OD/40 ID to 190 OD /160 ID | Skived & roller burnished to H8 tubing (Cold drawn welded)
- EN10305-1 & EN10305-2 E355 + SR | Size Range: 73 OD/63 ID to 245 OD /200 ID | Honed bore tubing to H8 (Cold drawn welded & Cold drawn seamless)
- Chrome plated rods | Coming soon!
Get in touch with us
We would be happy to help if you have any questions or queries, please get in touch.