Product Overview
SS316L-SPR Stainless Steel Wire & Coil is a premium medical-grade wire solution engineered for critical applications demanding exceptional corrosion resistance, biocompatibility, and dimensional precision. Manufactured from ultra-low-carbon SS316L stainless steel (UNS S31603), this annealed, bright-finish wire complies fully with ISO 5832-1 — the international standard for metallic materials used in surgical implants. Ideal for high-precision medical device manufacturing, it delivers consistent mechanical properties across diameters ranging from 0.15mm to 3.2mm, making it one of the most trusted stainless steel wire options in regulated healthcare environments.
Each coil undergoes rigorous quality control, including full traceability documentation, surface cleanliness verification (free of oxides, scale, or particulate contamination), and certified tensile testing. The SPR (Spring Temper) designation indicates optimized ductility and formability post-annealing — essential for coiling, weaving, stent winding, and micro-component fabrication. As a key medical wire grade, it supports FDA 510(k)-cleared and CE-marked device production workflows.
Key Features
- ISO 5832-1 compliant — certified for permanent implant applications
- Bright, smooth surface finish ensuring low friction and enhanced biocompatibility
- Fully annealed condition for superior bendability and cold-forming performance
- Diameter range: 0.15mm–3.2mm (±0.002mm tolerance on fine gauges)
- Traceable lot numbers with full material test reports (MTRs)
- Available in spools (1–5 kg) and reels (up to 50 kg) with protective packaging
Technical Specifications
| Parameter |
Value |
| Material Grade |
SS316L (UNS S31603) |
| Standard Compliance |
ISO 5832-1, ASTM F138/F139 |
| Carbon Content |
≤ 0.03% (max) |
| Condition |
Annealed (SPR temper) |
| Surface Finish |
Bright, pickled & polished |
| Diameter Range |
0.15 mm – 3.2 mm |
| Tensile Strength (0.15mm) |
750–900 MPa |
| Elongation (min) |
35% (ASTM E8) |
| Corrosion Resistance |
Excellent in saline, bodily fluids, and sterilization cycles |
| Packaging |
Vacuum-sealed, anti-tarnish film + rigid spool/reel |
| Biocompatibility |
ISO 10993-5/-10/-11 tested (cytotoxicity, sensitization, irritation) |
| Traceability |
Full lot-level MTRs with heat number, chemistry, and mechanical data |
Applications
This SS316L coil is widely deployed in Class II and III medical devices, including cardiovascular stents, orthopedic fixation wires, suture needle components, endoscopic instrument springs, and dental archwires. Its reliability as a 0.15mm wire enables micro-coiling for neurovascular devices, while larger diameters support surgical cable assemblies and robotic surgery tooling. Also used in high-purity pharmaceutical processing equipment and analytical instrumentation where ISO 5832-1 compliance is mandatory.
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