ST52V DOM Low Carbon Steel Tube – Cold Drawn ERW Tube for Hydraulic Cylinders

Material

ST52V DOM tube is a cold drawn, electric resistance welded (ERW) low carbon structural steel tube. Through the DOM (Drawn Over Mandrel) process, the tube achieves refined grain structure, uniform wall thickness, and improved mechanical properties. It is specifically engineered for applications requiring high dimensional accuracy, smooth internal surface, and stable performance, such as hydraulic and pneumatic cylinders.

Specifications

• Manufacturing Process: ERW + DOM (Cold Drawn Over Mandrel)

• Shape: Round

• Surface Condition: Cold drawn, phosphated or oiled (optional)

• Delivery Condition: +SR / +A (according to standard requirements)

• Outer Diameter Range: Typically 20 mm – 350 mm

• Wall Thickness Range: Typically 2 mm – 40 mm

• Length: Random length or fixed length as required

Key Features

• Excellent dimensional precision and concentricity

• Smooth inner surface suitable for honing and skiving

• Stable mechanical properties along the tube length

• Good weld integrity with no visible weld seam after drawing

• Suitable for further machining and surface finishing

Our Advantages

Customers sourcing DOM tubes for hydraulic cylinders usually focus on quality consistency, surface finish, mechanical reliability, delivery stability, and compliance with standards. We address these concerns as follows:

• Consistent Inner Surface Quality
  The DOM process eliminates weld seam irregularities, ensuring a uniform bore that reduces honing time and tool wear.

• Reliable Mechanical Performance
  Controlled cold drawing improves strength and toughness, minimizing deformation risks under high hydraulic pressure.

• Strict Dimensional Tolerance Control
  Tight OD and ID tolerances ensure easy assembly and excellent sealing performance in cylinder systems.

• Stable Supply and Batch Traceability
  Each production batch is traceable, ensuring repeatable quality for long-term projects and serial production.

• Customization Capability
  Heat treatment condition, length, surface protection, and packaging can be tailored to specific hydraulic cylinder requirements.

Chemical Composition

Mechanical Properties

Applicable Standards

• ASTM: ASTM A513 (Type 5 DOM)

• EN: EN 10297-1 E355

• DIN: DIN 2391 St 52

• JIS: JIS G4051 (comparable grades)

• GB: GB/T 3639

Application Areas

General Application Fields:
Hydraulic systems, mechanical engineering, automotive components, heavy equipment, and precision machinery.

Specific Uses in Hydraulic Systems:

• Hydraulic cylinder barrels

• Pneumatic cylinder tubes

• Telescopic cylinders

• Precision mechanical sleeves

• Machined structural components

Q: Are you trading company or manufacturer ?

A: manufacturer,also can do trading.

Q: How long is your delivery time?

A: Generally speaking,it is 10-15 days if the goods are in stock,or it is 30-40 days if the goods are not in stock,

it is according to quantity.

Q: Do you provide samples? is it free or extra ?

A: Yes, we could offer the sample for free charge but need pay the cost of freight.

Q: What is your terms of payment ?

A: Payment<=2000USD, 100% in advance. Payment>=2000USD, 30% T/T in advance ,balance before shippment.

If you have another question, pls feel free to contact with me.