DOM Steel Tube 30-325mm OD for Mechanical Applications
Product Details
DOM steel tube cold drawn
,DOM steel tube mechanical applications
,DOM steel tube 30-325mm OD
T5 DOM Steel Tube Drawn Over Mandrel Low Carbon Steel Welded Pipe For Mechanical
This product is a Drawn-Over-Mandrel (DOM) steel tube manufactured from low-carbon welded pipe, designed for demanding mechanical applications requiring high precision, uniform mechanical properties, and excellent surface finish. It is cold-drawn over a mandrel to achieve tight tolerances on outside diameter (OD), inside diameter (ID), and wall thickness, resulting in smooth, oxide-free surfaces and superior concentricity. Typical sizes range from very small ODs for precision hydraulic components up to large ODs suitable for structural shafts, with wall thicknesses optimized for strength-to-weight performance. Below is a detailed breakdown of its material characteristics, specifications, chemical and mechanical properties, main features, applicable standards, and application areas.
Material
T5 DOM steel tubing is produced from low-carbon electric-resistance-welded (ERW) “mother tubes” that are cold-drawn over a mandrel to improve dimensional accuracy and surface quality. The base material is typically ASTM A513 Grade 1020 or 1026, selected for its balance of weldability, machinability, and strength.
Specifications
-
Size range (stocked): 3/16″ to 14″ OD; wall thickness from 0.028″ to 0.625″
-
Length: Supplied in random lengths of 17′–24′, with cut-to-length service available
-
Manufacturing process: Electric-resistance-welded → cold-drawn over mandrel (DOM)
-
Grades: Primarily 1020 (OD ≤2″ / wall ≤0.156″) and 1026 (larger or heavier wall)
Chemical Composition
The chemical composition limits for five representative low-carbon DOM grades under ASTM A519 are shown below:
| Grade | C (wt %) | Mn (wt %) | P (max wt %) | S (max wt %) |
|---|---|---|---|---|
| 1018 | 0.15–0.20 | 0.60–0.90 | 0.040 | 0.050 |
| 1020 | 0.18–0.23 | 0.30–0.60 | 0.040 | 0.050 |
| 1022 | 0.18–0.23 | 0.70–1.00 | 0.040 | 0.050 |
| 1026 | 0.22–0.28 | 0.60–0.90 | 0.040 | 0.050 |
| 1030 | 0.28–0.34 | 0.60–0.90 | 0.040 | 0.050 |
Mechanical Performance
Typical mechanical properties for these five grades in the drawn-over-mandrel condition are:
| Grade | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) |
|---|---|---|---|
| 1018 | 440 | 370 | 15 |
| 1020 | 420 | 350 | 15 |
| 1022 | 380 | 205 | 25 |
| 1026 | 490 | 415 | 15 |
| 1030 | 525 | 440 | 12 |
Main Features
-
Tight tolerances: Close OD/ID and wall thickness control for precision components
-
Superior surface finish: Smooth, scale-free surfaces ideal for hydraulic and rotating parts
-
Uniform mechanical properties: Cold drawing refines grain structure and increases strength
-
Excellent machinability: Minimal stock allowance required for secondary machining
-
High fatigue resistance: Suitable for cyclic loading in automotive and industrial machinery
Standards
-
ASTM A513 Type 5 (DOM mechanical tubing)
-
ASTM A519 (cold-finished seamless mechanical tubing)
-
EN 10305-3 (cold-drawn precision steel tubes)
-
GOST 8734 (cold-drawn welded steel tubes)
-
JIS G3446 (cold-drawn steel tubes)
-
GB/T 3639 (cold-drawn carbon steel precision tubes)
Application Fields
General Sectors
-
Automotive: Shafts, axles, suspension components
-
Hydraulics: Cylinder barrels, pistons, bushings
-
Industrial Machinery: Gears, bearings, spindles
-
Construction: Structural shafts, linkages
Specific Uses
-
Hydraulic cylinders: Smooth bore for sealing and rod guidance
-
Automotive steering: High concentricity reduces vibration
-
Machine spindles: Enhanced fatigue life under cyclic loads
-
Precision shafts: Tight tolerances ensure accurate alignment
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.
-
Auto Parts ASTM A513 Cold Rolling Welded Steel Tubes with DOM Production
Auto Parts ASTM A513 Welded Steel Tubes with DOM production ASTM A513 Electric-Resistance-Welded Carbon and Alloy Steel Mechanical Tubing Applications: for Machinery, Mechanical Engineering 1. Standard: ASTM A513 cold rolling welded precision steel tubes 2. Steel Grade: SAE1010, SAE1020, other materials upon agreement with customers. 3. Production method: Cold rolling on the weled steel tubes, to reach high accuracy on the OD and WT tolerance 4. Size range: O.D.:6-350mm W.T. -
25mm Diameter Bright Annealing Seamless Steel Tube for Hydraulic Systems
EN10305-1 E235 E355 NBK Bright Annealing Precision Steel Pipes for Hydraulic Systems EN10305-1 NBK Bright Annealed Precision steel pipes for Hydraulic system OD:4-80 (mm) WT0.5-10 (mm) Length 1000-12000mm Product name: Seamless Precision Steel Pipe Application: for hydraulic systems precision steel pipes for Hydraulic system OD (mm) WT (mm) Length (mm) 4 0.5 5800-6000 4.0 1.0 5800-6000 5.0 1.0 5800-6000 6.0 1.0 5800-6000 6.0 1.5 5800-6000 8.0 1.0 5800-6000 9.5 0.89 5800-6000 -
Precision Seamless Black Phosphating Steel Tube for Hydraulic Systems
Steel Pipes with high precision for Hydraulic Systems with Black Phosphating surface Black Phosphated Hydraulic Tubes with High Precision and tight tolerance, the tubes are produced by precision cold drawn and cold rolling, then bright annealed in a protected atmosphere, afterwards it is blackphosphated on the surface Production process: DIN series tubes, cold drawn and bright annealed precision seamless steel tube is used as the tube to be phosphated. The phosphorization is -
Precision Seamless Galvanized Steel Tubes DIN2391 EN103052 ST35.0 ST37
Precision Seamless Galvanized Steel Tubes DIN2391 EN103052 ST35.0 ST37 Production Process: Cold rolling by Cold pilger machine and Cold rolling machine,galvanized and zinc plated could be applied. Cold Rolled and Galvanized Steel Tube Production process: DIN highly accurate, cold rolled and bright seamless steel tube is used as the tube to be galvanized. The outer wall of tube is electroplated. The caps are covered at two ends of tube to prevent from the dust. Main Features:
