Standard Wall Thickness Stainless Steel Coil Tube (0.5mm – 1.5mm)
Product Overview
The Standard Wall Thickness Stainless Steel Coil Tube, manufactured by Wenzhou Jixing Metal Materials Co., Ltd., represents the industry's most sought-after specification range for precision coil tubing applications. With wall thicknesses spanning from 0.5mm to 1.5mm, this product line occupies the optimal cost-performance zone that balances structural integrity, corrosion resistance, and economic efficiency. As the mainstream specification in the global stainless steel tubing market, this series is engineered to meet the demanding requirements of heat exchangers, fluid conveying systems, and precision manufacturing sectors worldwide.
Material & Properties
These coil tubes are fabricated from high-grade austenitic stainless steel grades, primarily AISI 304, 304L, 316, and 316L, ensuring superior resistance to oxidation, pitting, and general corrosion in a wide range of environments. The austenitic microstructure provides excellent formability, weldability, and ductility, making these tubes ideal for tight-bend-radius forming operations without risk of cracking or deformation.
- Corrosion Resistance: Exceptional resistance to atmospheric corrosion, acidic media, and chloride-containing environments
- Mechanical Properties: Tensile strength ranging from 515–730 MPa with elongation of 40% or greater
- Temperature Tolerance: Operational range from cryogenic temperatures up to 870°C (304/304L) and 925°C (316/316L)
- Surface Finish: Available in bright annealed (BA), pickled and passivated (2B), and polished finishes
Specifications
| Parameter | Specification |
|---|---|
| Wall Thickness | 0.5 mm – 1.5 mm |
| Outer Diameter (OD) | 3.0 mm – 50.0 mm (customizable) |
| Coil Diameter | Standard: 500 mm / 600 mm / 800 mm |
| Coil Weight | Up to 500 kg per coil |
| Tolerance – OD | ±0.05 mm – ±0.10 mm |
| Tolerance – Wall Thickness | ±10% or ±0.03 mm (whichever is greater) |
| Standards | ASTM A213 / A269, EN 10217, ISO 3506, GB/T 12771 |
| Material Grades | 304, 304L, 316, 316L, 321, 310S |
| Surface Treatment | Bright Annealed (BA), 2B, Polished |
| Bend Radius | Minimum 3× OD (cold bending) |
Manufacturing Process
The production of Standard Wall Thickness Stainless Steel Coil Tubes at Wenzhou Jixing follows a rigorous multi-stage manufacturing process:
- Hot Rolling & Annealing: Stainless steel strip is hot-rolled to initial gauge and solution-annealed to ensure uniform microstructure and eliminate residual stresses.
- Cold Reduction: Multi-stand cold reduction mills progressively reduce the strip to the target wall thickness within the 0.5–1.5mm range, achieving tight dimensional tolerances.
- Coiling & Straightening: The reduced strip is precisely coiled and straightened to ensure consistent flatness prior to forming.
- Tube Forming: The strip is fed through precision-rolled dies or welded-and-finished in continuous coil-forming lines, producing uniform tubular geometry along the entire coil length.
- Welding (for welded tube): High-frequency induction welding is employed with precise heat input control to achieve metallurgical soundness of the weld seam.
- Heat Treatment: Solution annealing at 1040–1120°C followed by rapid water quenching to restore full austenitic structure and maximum corrosion resistance.
- Pickling & Passivation: Chemical treatment removes scale and surface contaminants, forming a protective chromium oxide passive layer.
- Final Inspection: 100% dimensional checking, hydrostatic pressure testing, and surface quality verification before packaging.
Applications
The 0.5–1.5mm wall thickness range is the industry's most versatile specification, serving an exceptionally broad array of applications:
- Heat Exchangers: Shell-and-tube, plate-fin, and compact heat exchanger tubes for HVAC, refrigeration, and industrial process cooling
- Fluid Conveyance Systems: Food-grade, pharmaceutical, and chemical process piping where hygiene and corrosion resistance are paramount
- Automotive Industry: Fuel lines, exhaust systems, turbocharger intercoolers, and air conditioning refrigerant lines
- Medical Devices: Endoscopic instrument tubing, dialysis equipment, and surgical tool components
- Oil & Gas: Downhole instrumentation tubing and chemical injection lines
- Electronics & Energy: Solar thermal collectors, battery thermal management, and electrical appliance heating elements
- Aerospace: Fuel and hydraulic system tubing requiring lightweight, high-strength configurations
Quality Certifications
Wenzhou Jixing Metal Materials Co., Ltd. maintains comprehensive quality assurance systems ensuring every coil tube meets or exceeds international standards:
- ISO 9001:2015 – Quality Management System Certification
- ISO 14001 – Environmental Management System
- EN 10204 3.1 – Material Test Certificates provided with every shipment
- CE / PED – Compliance with European Pressure Equipment Directive for applicable applications
- ASME – Compliance with American Society of Mechanical Engineers standards
- Third-Party Inspection: Available upon request (SGS, BV, TUV, etc.)
Key Selling Points
Optimal Cost-Performance Ratio: The 0.5–1.5mm wall thickness range represents the sweet spot between material economy and mechanical performance, delivering maximum value for the majority of industrial applications.
Mainstream Market Availability: As the most widely specified wall thickness series, these products offer immediate supply availability, minimal lead times, and extensive inventory depth.
Superior Formability: Thin-wall construction enables tight bending radii, complex forming operations, and seamless integration into compact system designs without compromising structural integrity.
Full Traceability: Every coil is heat-number traced with complete chemical and mechanical test documentation from mill to delivery.