Nakoda Steel Industry – DOM-ERW Tubing Solutions for Precision Engineering
Nakoda Steel Industry specializes in manufacturing high-quality Drawn Over Mandrel Electric Resistance Welded (DOM-ERW) Tubing, a critical component in industries requiring precision, durability, and reliability. Our tubing is engineered to meet global standards, including ASTM A513 Type 5 and Type 6, and is produced across facilities in Malaysia, India, and China. This strategic manufacturing footprint ensures efficient logistics and competitive pricing for clients worldwide. Below is an in-depth look at our product specifications, capabilities, and applications.
Product Overview
DOM-ERW tubing is manufactured through a cold-drawing process that enhances dimensional accuracy, surface finish, and mechanical properties. The process begins with electric resistance welding (ERW) to form a seamless-like tube, which is then drawn over a mandrel to achieve tight tolerances. This method ensures uniformity in wall thickness and roundness, making it ideal for high-stress applications in automotive, aerospace, hydraulics, and heavy machinery.
Key Features
- Heat Treatment:
- Normalizing: Refines the grain structure, improving ductility for cold-working processes.
- Stress Relieving: Reduces residual stresses post-forming, enhancing dimensional stability.
- Full Annealing: Softens the material for complex machining operations.
- Global Supply Chain: Production hubs in Malaysia, India, and China enable rapid delivery to North America, Europe, and Asia-Pacific markets.
- Standards Compliance: Meets ASTM A513, DIN 2391, and JIS G3445 for international projects.
Stocked Size Range
We maintain ready inventory for immediate shipment in the following dimensions:
- Outer Diameter (O.D.): 0.250” (6.35 mm) to 2.000” (50.8 mm).
- Wall Thickness: 0.028” (0.71 mm) to 0.120” (3.05 mm).
Custom sizes up to 8.000” (203.2 mm) O.D. and 0.500” (12.7 mm) wall thickness are available on request.
Material Grades & Chemical Composition
Our DOM-ERW tubing is available in multiple steel grades to suit diverse industrial needs:
- Carbon Steels: 1008, 1010, 1020, 1026 (ideal for general-purpose applications).
- Alloy Steels: 4130 (high-strength, used in aerospace and defense).
- International Equivalents: ST 37-2 (DIN), STKM 11a (JIS), and ST 52.3 (EN).
Chemical Composition (ASTM A513):
| Grade Carbon (%) | Manganese (%) | Phosphorus (max) | Sulfur (max) |
| 1010 0.05–0.15 | 0.30–0.60 | 0.035% | 0.035% |
| 1020 0.15–0.25 | 0.30–0.60 | 0.035% | 0.035% |
| 1026 0.22–0.28 | 0.60–0.90 | 0.035% | 0.035% |
Mechanical Properties
DOM-ERW tubing undergoes rigorous testing to ensure compliance with mechanical benchmarks:
As-Welded Tubing
Suitable for applications requiring moderate strength and formability:
- Grade 1020: Yield strength of 38 ksi (262 MPa), ultimate strength of 52 ksi (359 MPa), and elongation of 12%.
Normalized Tubing
Heat-treated for enhanced toughness and uniformity:
- Grade 1010: Yield strength of 25 ksi (172 MPa), ultimate strength of 40 ksi (276 MPa), and elongation of 30%.
Mandrel-Drawn Tubing
Cold-worked for high precision and strength:
- Grade 1020: Yield strength of 60 ksi (414 MPa), ultimate strength of 70 ksi (483 MPa), and hardness of 80 RB.
Applications Across Industries
- 1. Automotive:
- Hydraulic Systems: Precision tubing for brake lines and fuel injection systems.
- Chassis Components: High-strength 4130 alloy tubes for lightweight structural parts.
- 2. Aerospace:
- Landing Gear: Mandrel-drawn 1026 tubing for fatigue resistance.
- Engine Mounts: Stress-relieved tubes to withstand vibration and thermal cycling.
- 3. Construction:
- Scaffolding: Durable 1020 tubing with corrosion-resistant coatings.
- Heavy Equipment: Thick-walled DOM tubes for excavator arms and crane booms.
- 4. Oil & Gas:
- Downhole Tools: Seamless-like ERW tubing for drilling operations in corrosive environments.
Quality Assurance & Testing
Nakoda Steel Industry employs a multi-stage quality control process:
- 1. Chemical Analysis: Spectrometry to verify alloy composition.
- 2. Mechanical Testing: Tensile, hardness (Rockwell B), and elongation tests.
- 3. Non-Destructive Testing (NDT): Ultrasonic and eddy current inspections to detect internal flaws.
- 4. Certifications: EN 10204 3.1B mill test certificates, NACE MR-01075 for sour service.
Customization & Logistics
- Tailored Solutions: Custom grades (e.g., 4140), coatings (zinc, phosphate), and lengths.
- Packaging: Oil-coated, waterproof wrapping with wooden crates for sea freight.
- Delivery: Partner warehouses in Houston, Rotterdam, and Singapore ensure JIT delivery.
Why Choose Nakoda?
- Precision Engineering: Tolerance levels up to ±0.001” for critical applications.
- Cost Efficiency: Competitive pricing from integrated manufacturing in Asia.
- Technical Support: Dedicated team for material selection and prototyping.
Contact Us Today
For DOM-ERW tubing that combines precision, strength, and global compliance, partner with Nakoda Steel Industry. Let us tailor solutions to your project’s exact needs.