Precision Stainless Steel Capillary Tubes – OEM Manufacturing for Medical Components
What Are Precision Grade Stainless Steel Capillary Tubes?
Medical grade stainless steel capillary tubes are ultra-precision hollow tubes manufactured to the strictest dimensional tolerances and surface quality standards. Made from 316LVM, 304, 420J2, and other certified stainless steel grades, these tubes serve as critical components in surgical instruments, diagnostic devices, drug delivery systems, and implantable medical applications.
As a leading precision grade stainless steel capillary tube OEM manufacturer, we provide custom-dimension tubes with full material traceability, EN 10204 3.1 certification, and compliance with ISO 9001 and ASTM F138 standards.
Materials We Work With
| Grade | UNS | Key Properties | Medical Applications |
|---|---|---|---|
| 316LVM | S31603 | Low vacuum melting, biocompatible, fatigue resistant | Implants, surgical needles, orthopedic devices |
| 316L | S31603 | Superior corrosion resistance, low carbon | Diagnostic equipment, drug delivery, catheter components |
| 304 | S30400 | General purpose, cost-effective | Non-implantable instruments, equipment tubing |
| 420J2 | S42040 | High hardness (50-55 HRC), wear resistant | Surgical blades, scissors, biopsy needles |
| 430 | S43000 | Magnetic, formable | Magnetic sensor components, special instruments |
Dimensional Capabilities
| Specification | Range | Tolerance |
|---|---|---|
| Outside Diameter (OD) | 0.1mm – 6.0mm | ±0.005mm to ±0.02mm |
| Wall Thickness | 0.025mm – 0.5mm | ±0.005mm to ±0.025mm |
| Roundness | — | ≤0.01mm |
| Straightness | — | ≤0.5mm per meter |
| Surface Roughness (Ra) | — | ≤0.4μm (bright annealed), ≤0.2μm (electropolished) |
| Length | Up to 30m coil or straight cut | ±0.1mm to ±1.0mm |
OEM Manufacturing Process
- Material Selection & Certification — Certified 316LVM/304/420J2 rod with EN 10204 3.1 documentation
- Piercing — Rotary piercing or cold extrusion to create hollow mother tube
- Cold Drawing (5-15 passes) — Progressive diameter reduction with intermediate bright annealing
- Bright Annealing — Controlled atmosphere (N₂/H₂) at 1040-1120°C for stress relief and surface quality
- Surface Treatment — Electropolishing, passivation, or coating per customer specification
- Precision Cutting — Laser cutting for burr-free, precision-length tubes
- Forming & Fabrication — Bending, flaring, swaging, laser welding for assemblies
- 100% Inspection — Laser micrometer OD measurement, eddy current flaw detection, hydrostatic testing
- Cleanroom Packaging — Ultrasonic cleaning, sealed packaging, labeled for sterile handling
Quality Standards & Certifications
- ISO 9001:2016 — Medical device quality management system
- ISO 9001:2015 — Quality management system
- ASTM F138 — 316LVM stainless steel for surgical implants
- ISO 5832-1 — Metallic materials for surgical implants
- ISO 10993 — Biocompatibility testing (cytotoxicity, sensitization, irritation)
- EN 10204 3.1 — Material certification with specific test results
Why Choose Us as Your OEM Partner?
| Advantage | Details |
|---|---|
| 20+ Years Experience | Specialized in precision grade stainless steel capillary tubes and surgical needle components |
| Full In-House Manufacturing | Piercing → drawing → annealing → electropolishing → cutting → inspection → packaging |
| Tight Tolerances | OD ±0.005mm, wall ±0.005mm for micro-tubes |
| Custom Solutions | Non-standard sizes, special surface treatments, bending, flaring, welding |
| Full Traceability | Heat number, batch tracking, EN 10204 3.1 certification with every order |
| Fast Turnaround | 2-4 weeks standard, 4-8 weeks custom, free samples available |
Request a Quote
Contact us with your specifications — material grade, OD, wall thickness, length, surface finish, quantity — and receive a competitive OEM quote within 24 hours. Free samples available for evaluation.
Healsmed
Leading Stainless Steel Capillary Tube Factory. 1,400+ standard sizes IN STOCK & ready to ship worldwide! High precision, factory-direct price.
