DOM Steel Tube for Roll Cage ASTM DIN GB JIS API Certified
Round DOM Roll Cage Tubing Structural Steel Pipe DOM Tubing For Roll Cage
【Material】
Drawn Over Mandrel (DOM) tubing is produced by electric resistance welding of carbon-steel strip followed by cold drawing over a mandrel to remove weld flash and enhance mechanical properties. This process yields:
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Uniform wall thickness and concentric OD/ID.
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Improved yield and tensile strength compared to standard ERW tubes.
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Smooth OD/ID surfaces, requiring minimal machining.
【Specifications】
| Property | Value |
|---|---|
| OD range | 3/16″ to 5″ (4.76 mm to 127 mm) |
| Wall thickness | 0.028″ to 0.625″ (0.71 mm to 15.88 mm) |
| Length | Random lengths 17′–24′ (5.18 m–7.32 m); cut-to-length available |
| Tolerances | ±0.005″ for OD; ±0.003″ for wall thickness |
| Surface finish | Pickled and oiled; optional honing for hydraulic applications |
【Chemical Composition】
| Grade | C | Mn | P (max) | S (max) |
|---|---|---|---|---|
| SAE 1020 | 0.18–0.23 | 0.30–0.60 | 0.04 | 0.05 |
| SAE 1026 | 0.22–0.28 | 0.60–0.90 | 0.015 | 0.005 |
| SAE 520 | 0.17–0.23 | 0.30–0.60 | 0.04 | 0.05 |
| EN-ST52.3 | ≤ 0.22 | ≤ 1.60 | ≤ 0.025 | ≤ 0.025 |
| AISI 4130 | 0.28–0.33 | 0.40–0.60 | 0.035 | 0.040 |
【Mechanical Performance】
| Grade | Yield Strength (MPa) | Tensile Strength (MPa) | Elongation (%) |
|---|---|---|---|
| SAE 1020 | 512 | 602 | 15 |
| SAE 1026 | 517 | 586–690 | 15 |
| SAE 520 | 512 | 602 | 15 |
| EN-ST52.3 | ≥ 355 | 510–690 | ≥ 20 |
| AISI 4130 | ≥ 482 | ≥ 586 | ≥ 20 |
【Main Features】
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High Strength-to-Weight Ratio: Superior yield and tensile properties for lightweight yet robust roll-cage structures.
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Precision Dimensions: Tight tolerances reduce machining time and ensure consistent fitment.
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Excellent Weldability: Low sulfur and phosphorus content facilitates gas- and arc-welding without pre- or post-heat in most grades.
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Uniform Grain Structure: Cold drawing promotes refined microstructure and improved fatigue resistance.
【Standards & Specifications】
| Region | Standard | Scope |
|---|---|---|
| USA | ASTM A513 Type 5 | Cold-drawn ERW carbon-steel mechanical tubing |
| USA | ASTM A500 | Cold-formed welded or seamless structural tubing |
| EU | EN 10305-3 | Welded, cold-sized precision steel tubes |
| Russia | GOST 8732 | Electric-welded steel tubes |
| Japan | JIS G3445 | Welded steel precision tubes |
| China | GB/T 3094 | Welded, cold-drawn precision steel tubes |
【Application Fields】
Automotive & Motorsports
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Roll Cages: Main chassis members, hoop assemblies, cross-bracing
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Chassis Tubing: Frame rails, suspension links
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Drive Shafts & Axle Tubes
Industrial & Construction
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Hydraulic Cylinders: Honing stock for rods and barrels
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Pneumatic Systems: Cylinder bodies
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Structural Supports: Frames and guard rails
Usage Examples
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Roll Cage A-Pillar Hoop: 1.75″ × 0.120″ DOM 1026 for FIA compliance
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Main Hoop Backbone: 2.00″ × 0.120″ AISI 4130 for maximum strength
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Honing Stock: EN-ST52.3 for hydraulic rams requiring honed ID
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.
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