Ultra-High Precision Stainless Steel Coil Tube — Semiconductor & Aerospace Grade
Product Overview
Wenzhou Jixing Metal Materials Co., Ltd. offers a premium line of ultra-high precision stainless steel coil tubes engineered to the most demanding dimensional tolerances in the industry. Designed specifically for semiconductor equipment applications (EP tubing) and aerospace hydraulic systems, these coil tubes deliver exceptional geometric accuracy, consistent wall uniformity, and superior surface finish integrity. Every coil is manufactured under strict process controls to ensure repeatability, traceability, and compliance with the rigorous specifications required by global semiconductor and aerospace OEMs.
Material & Properties
- Base Materials: Available in 304, 304L, 316, 316L, 321, 347, and custom alloy grades depending on end-use requirements.
- Corrosion Resistance: Excellent resistance to intergranular corrosion, pitting, and stress corrosion cracking in aggressive chemical environments.
- Mechanical Properties: High tensile strength with controlled elongation, ensuring reliable performance under cyclic hydraulic loads and thermal cycling.
- Purity & Cleanliness: Low carbon and low sulfur content grades (L-series) available for welding-critical and ultra-clean fluid handling applications.
Specifications
| Parameter | Tolerance / Specification | Notes |
|---|---|---|
| Outer Diameter (OD) Tolerance | ±0.05 mm | Ultra-high precision grade — far exceeding standard ASTM A269 tolerances (±0.10 mm) |
| Wall Thickness (WT) Tolerance | ±3% of nominal | Ensures uniform hydraulic flow characteristics and consistent pressure ratings |
| Surface Finish | RA ≤ 0.4 μm (available) | Pipe-grade electropolished or mechanically polished surfaces for semiconductor EP applications |
| Coil Length | Custom per order | Supplied in continuous coil form for automated forming and cutting systems |
| End Condition | Plain end, beveled, or per drawing | Customizable to match customer assembly requirements |
| Applicable Standards | ASTM A269, ASTM A270, AMS 5508, AMS 5520 | Compliant with semiconductor and aerospace industry specifications |
Manufacturing Process
- Hot Rolling & Annealing: Billet material is hot-rolled into seamless tube blanks and subjected to full solution annealing to achieve a uniform austenitic microstructure.
- Precision Cold Drawing: Multi-pass cold drawing through precision-die tooling progressively reduces dimensions while maintaining the ultra-tight OD tolerance of ±0.05 mm. Interpass annealing eliminates work-hardening effects.
- Pilot Pulling & Calibration: Final pass uses hardened carbide pilots and calibration dies to lock in dimensional accuracy and roundness within specified limits.
- Wall Thickness Verification: High-frequency ultrasonic gauging (100% inspection) ensures wall thickness remains within ±3% across the entire coil length.
- Surface Treatment: Optional electropolishing, passivation, or mechanical polishing to achieve required surface roughness and cleanliness levels.
- Coiling & Packaging: Tubes are coiled on precision mandrels with protective packaging to prevent surface damage and dimensional distortion during transit.
Applications
- Semiconductor Equipment: EP (electropolished) tubing for wafer processing tools, ultra-pure gas delivery systems, and chemical vapor deposition (CVD) / plasma etching equipment.
- Aerospace Hydraulic Systems: High-pressure hydraulic lines, fuel system tubing, and pneumatic actuator lines requiring tight dimensional control for leak-free crimping and flaring.
- Medical & Biotech: Sterilizable fluid transfer lines and CIP/SIP process tubing where dimensional consistency ensures reliable fitting assembly.
- Custom Precision Assemblies: OEM applications where coil form factor enables automated tube-levelling, cutting, and forming with minimal material waste.
Quality Certifications & Compliance
- ISO 9001:2015 Certified Quality Management System
- Material traceability via mill heat numbers and full chemical/mechanical test reports
- Third-party dimensional inspection available (coordinate measuring machine, laser profilometry)
- Compliant with SEMI F57 (semiconductor equipment material specifications)
- NADCAP or equivalent aerospace quality audit support upon request
Key Selling Points
- Industry-Leading Tolerances: OD ±0.05 mm and WT ±3% set apart this product from standard-grade coil tubes, meeting the exacting demands of semiconductor and aerospace sectors.
- Coil Form Factor: Enables high-speed automated processing, reducing downstream fabrication time and material waste compared to straight-length supply.
- Custom Engineering: Wenzhou Jixing Metal Materials Co., Ltd. supports full customization of material grade, dimensions, surface finish, and coil configuration to match specific OEM drawings.
- End-to-End Traceability: Every coil is backed by complete material documentation, process records, and inspection data ensuring full supply-chain accountability.