GR23 Titanium Medical Wire
Overview
GR23 Titanium Medical Wire is made from Ti-6Al-4V ELI (Extra Low Interstitial) - a high-purity version of the world's most-used titanium alloy, with oxygen, iron, and carbon strictly limited for superior ductility and fatigue performance inside the human body.
Supplied in diameters from 0.10mm to 6.00mm, in annealed or cold-drawn tempers, with bright drawn, micro-polished, or ground surface finish. Straight cut lengths and precision-wound coils both available.
Produced to ASTM F136 / ISO 5832-3 with full chemistry, mechanical, and microstructure certification - plus ISO 10993 biocompatibility documentation on request. From surgical sutures to spinal fixation, our wire holds its shape, strength, and purity.
ASTM F136
Implant Grade
ISO 5832-3
Certified
≤ 0.13%
Oxygen ELI
15+Years
Experience
24h
Quote Response
GR23 (ELI) vs Standard GR5
Both are Ti-6Al-4V. But for implants, the chemistry of GR23 is tighter - and that matters.
GR23 - Ti-6Al-4V ELI
Extra Low Interstitials. Oxygen held ≤ 0.13%, iron ≤ 0.25%, carbon ≤ 0.08% - delivering the ductility and fracture toughness implantables demand.
| Oxygen (O) | ≤ 0.13% |
| Iron (Fe) | ≤ 0.25% |
| Carbon (C) | ≤ 0.08% |
| Elongation (ann.) | ≥ 12% |
| Fracture Toughness | Excellent |
| Biocompatibility | ISO 10993 |
✓ Certified for permanent implantation
GR5 - Ti-6Al-4V
Standard aerospace alloy. Higher oxygen content raises strength slightly, but reduces ductility and fatigue reliability in cyclic-load implant applications.
| Oxygen (O) | ≤ 0.20% |
| Iron (Fe) | ≤ 0.25% |
| Carbon (C) | ≤ 0.08% |
| Elongation (ann.) | ≥ 10% |
| Fracture Toughness | Good |
| Biocompatibility | Not certified |
Suitable for industrial & structural use
Why it matters: Higher oxygen makes titanium stronger but more brittle. Inside the body, where wire bends with every heartbeat or step, ductility and fatigue resistance are safety-critical. GR23's tighter interstitial limits give wire that flexes without cracking - which is why F136/GR23 is the only Ti-6Al-4V grade accepted for permanent implantation under ISO 5832-3.
Mechanical Behavior in the Body
GR23 wire offers a low elastic modulus (~113 GPa) - closer to cortical bone than stainless steel. This reduces stress shielding around bone screws and implants, improving healing outcomes. Combined with 860+ MPa tensile strength, it handles surgical bending and long-term cyclic loading without failure.
How Medical Titanium Wire Is Made
Ti-6Al-4V ELI ingot is double vacuum arc remelted (VAR) for chemical homogeneity and minimal interstitial pickup. The billet is rolled to rod, then progressively drawn through dies under controlled reduction - with intermediate anneals in inert atmosphere to prevent surface oxidation.
Each drawing pass is designed to control the final temper: soft and formable for surgical sutures, or hard and high-strength for K-wires and fixation pins.
Why Engineers Specify GR5 Wedge Spacers
Six properties that make ELI titanium wire the standard for implantable devices.
Implant-Grade Purity
ELI chemistry (O ≤ 0.13%) meets ISO 5832-3 and ASTM F136 for permanent implantation. Every heat double-VAR melted and verified.
Superior Fatigue Life
Lower interstitials mean fewer crack initiation sites under cyclic loading. Ideal for wires that bend with motion - sutures, stents, dynamic fixations.
Micro-Polished Surface
Ra ≤ 0.2μm bright finish. Smooth surfaces reduce tissue irritation, prevent bacterial adhesion, and dramatically extend fatigue performance.
Low Elastic Modulus
~113 GPa - much closer to cortical bone than stainless steel (193 GPa). Reduces stress shielding, improves implant integration and healing.
Precision Dimensional Control
Diameter tolerance to ±0.002mm on micro wire. Consistent OD along the entire coil. CNC inspection data available per lot.
Full Traceability
Compliance Built Into Every Spool
Documentation packages ready for your regulatory submissions.
ISO 5832-3
Surgical implant material standard for wrought Ti-6Al-4V ELI. Our wire is produced and tested to this specification.
Implant Metal
ASTM F136
Wrought Ti-6Al-4V ELI for surgical implant applications. Full mechanical and microstructure compliance.
US Standard
ISO 10993
Biological evaluation of medical devices. Biocompatibility test reports available for cytotoxicity, sensitization, and implantation.
Biocompat.
USP Class VI
United States Pharmacopeia plastic and material classification testing available for device master file support.
USP Testing
EU MDR / FDA
Material documentation formatted for EU MDR technical files and FDA regulatory submissions. Full lot traceability to heat.
Regulatory
Where GR23 Medical Wire Goes to Work
From surgical sutures to spinal fixation - wherever titanium meets the human body.
K-Wires & Fixation Pins
Kirschner wires, Steinmann pins, and bone screws drawn from high-strength GR23 wire. Precise diameters for accurate surgical placement and predictable load-bearing.
Archwires & Implants
Orthodontic archwires requiring low modulus and biocompatibility. Also used for dental implant components and abutment fabrication stock.
Stent Frames & Sutures
Micro-diameter wire for self-expanding stent frames, surgical sutures, and staples. Micro-polished surface ensures fatigue life under millions of cardiac cycles
Spinal Fixation & Mesh
Cerclage wire, spinal rods (from heavy wire), and craniofacial mesh. Titanium's imaging compatibility (MRI-safe) is essential for neurological implants.
23
Specifications
| Material Grade | Standard | Diameter Range | Diameter Tolerance | Inspection & Testing | Surface Finish |
| GR5 (Grade 5 / Ti-6Al-4V, UNS R56400) | ASTM B348 Form: Precision CNC-Machined / Stamped Wedge Spacer Washer | 0.05mm – 6.0mm (Fine wire to heavy straight wire) |
Fine Wire: ±0.003mm to ±0.01mm Straight Rods: h7, h8, h9 |
Tensile Testing, Chemical Analysis, Microstructure Inspection, Eddy Current Testing | Bright Drawn, Centerless Ground, Pickled, Polished |
Your Medical Titanium Partner in China
ELI Certified Purity
Strict oxygen control (≤ 0.13%) with documented gas analysis per heat. Not all "Ti-6Al-4V" is implant-grade - ours is certified.
0.002 mm Precision
Diameter tolerance to ±0.002mm on micro wire. Laser-micrometer 100% inspected. Consistent coil-to-coil performance.
15+ Years Experience
Dedicated titanium wire processor in Baoji, China's Titanium Valley. Established supply for medical device OEMs.
24h Quote Response
Send diameter, temper, length/coil, quantity, and surface finish. Detailed ASTM F136 quotation within 24 hours.
FAQ
Q: Are you a manufacturer or a trading company?
A: We are a professional and experienced titanium products manufacturer in China.
Q: Can you provide customized processing?
A: Yes. Baoji Yibaite supports cutting, bending, stamping, CNC machining, and deep drawing according to customer drawings.
Q: What is the delivery time?
A: Regular size in stock within 3–7 days; customized production about 10–15 working days.
Q: What standards do your GR5 titanium wedge spacer washers comply with?
A: Our GR5 titanium wedge spacer washers are manufactured from titanium material fully compliant with ASTM B348 / ASME SB348 for titanium and titanium alloy bars and forgings. Every order is accompanied by a full EN 10204 3.1 Material Test Certificate (MTC) reporting traceable chemical composition, mechanical properties (tensile strength ≥ 895 MPa, yield strength ≥ 830 MPa), and dimensional inspection results.
Q: What surface finishes are available?
A: Pickled surface, polished, brushed, sandblasted, and mirror finish are all optional.
Our Factory
