Gr23 Medical Titanium Wire
Gr23 Medical Titanium Wire
Gr23 Medical Titanium Wire
Gr23 Medical Titanium Wire

Gr23 Medical Titanium Wire

There are many titanium alloys that are used for various industries, but the ones that are compatible for medical use are Titanium 6AL4V and 6AL4V ELI. These are titanium materials that are alloyed with aluminum (6%) and vanadium (4%). They are also known as Grade 5 and Grade 23, and have high compatibility with the human body. There are several distributors all over the world who specialize in selling medical grade titanium materials. In the dental field, Ti-6Al-4V and Ti-6Al-4V ELI are often used for implants. A screw made of titanium is inserted into the jaw, which acts as the root of the tooth. The implant is given a certain amount of time for the titanium implant to blend into the bones. Once the implant has set in, an artificial tooth is inserted into the implant.

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Product Introduction

What is Gr23 Medical Titanium Wire?

Ti 6AL-4V ELI or Grade 23 is a higher purity Ti 6Al-4V product. It can be made into coils, rods, wire or flat wire. It is the preferred choice in any situation where high strength, light weight, good corrosion resistance and high toughness are required. It is more resistant to damage than other alloys.

ASTM F67 Titanium Wire Ti6Al-7Nb was developed for use in the medical and surgical device applications although its properties are nearly identical to Ti6Al4V however Niobium has been substituted for Vanadium as the beta stabilizing agent giving improved biocompatability. Ti6Al7Nb is widely used in the medical device industry.

Chemical Composition (%)

Element	ASTM F136 Requirement	ISO 5832-3 Requirement	AMS 4935 Requirement	Typical Value
Titanium (Ti)	Balance	Balance	Balance	Balance
Aluminum (Al)	5.50 – 6.50	5.50 – 6.50	5.60 – 6.30	5.80 – 6.20
Vanadium (V)	3.50 – 4.50	3.50 – 4.50	3.50 – 4.50	3.80 – 4.20
Iron (Fe)	≤ 0.25	≤ 0.30	≤ 0.25	≤ 0.20
Oxygen (O)	≤ 0.13	≤ 0.20	≤ 0.13	≤ 0.11
Carbon (C)	≤ 0.08	≤ 0.08	≤ 0.08	≤ 0.05
Nitrogen (N)	≤ 0.05	≤ 0.05	≤ 0.05	≤ 0.03
Hydrogen (H)	≤ 0.012	≤ 0.015	≤ 0.012	≤ 0.008
Yttrium (Y)	≤ 0.005	≤ 0.005	≤ 0.005	< 0.001
Others (Each)	≤ 0.10	≤ 0.10	≤ 0.10	< 0.10
Others (Total)	≤ 0.40	≤ 0.40	≤ 0.40	< 0.30

The ASME SB863 Titanium Gr 1 Wires

Physical Properties

Property	Value
Density	4.43 g/cm³ (0.160 lb/in³)
Melting Point	1600-1660°C (2912-3020°F)
Beta Transus Temperature	970-1000°C (1778-1832°F)
Thermal Conductivity	6.7 W/m·K at 20°C
Electrical Resistivity	1.78 μΩ·m at 20°C
Modulus of Elasticity	114 GPa (16.5 × 10⁶ psi)
Poisson's Ratio	0.31
Coefficient of Thermal Expansion	8.6 µm/m·°C (20-100°C)
Magnetic Properties	Non-magnetic
MRI Compatibility	Fully compatible – minimal artifact

Mechanical Properties

Property	ASTM F136 Requirement	ISO 5832-3 Requirement	Typical Annealed Value	Typical Cold Worked
Tensile Strength (MPa)	≥ 860	≥ 860	900 – 1000	1000 – 1200
Yield Strength (MPa) (0.2% offset)	≥ 790	≥ 780	820 – 920	920 – 1100
Elongation (%)	≥ 10	≥ 10	12 – 16	6 – 10
Reduction of Area (%)	≥ 25	≥ 25	30 – 45	20 – 30
Fatigue Strength (10⁷ cycles, R=0.1)	-	-	500 – 620 MPa	550 – 700 MPa
Hardness (HRC)	-	-	28 – 34	32 – 38
Hardness (HV)	-	-	290 – 330	330 – 380
Modulus of Elasticity (GPa)	-	-	114	114
Fracture Toughness (MPa√m)	-	-	65 – 90	50 – 70

Medical Packaging Options

Package Type	Description	Cleanroom Class	Typical Use
Precision Spools (Medical Grade)	Traverse-wound on static-dissipative plastic spools	ISO Class 7 (Class 10,000)	Automated manufacturing, stent winding
Small Spools	100g, 250g, 500g on medical-grade spools	ISO Class 7	R&D, prototype, small production
Standard Spools	1kg, 2kg, 5kg on plastic/steel spools	ISO Class 7	Production quantities
Layer-Wound Coils	Coiled on medical-grade carriers	ISO Class 7	Manual operations
Straight Lengths	Cut lengths in protective tubes	ISO Class 7	Surgical kits, custom lengths
Custom Spools	Customer-specified dimensions	ISO Class 7	Special requirements

FAQ

Q1: What is the difference between Grade 5 and Grade 23 Ti6Al4V for medical applications?

Grade 23 (ELI) has tighter controls on oxygen (≤0.13% vs ≤0.20%), iron (≤0.25% vs ≤0.40%), and hydrogen (≤0.012% vs ≤0.015%). This results in improved ductility (elongation 12-16% vs 8-12%) and fracture toughness, making Grade 23 the preferred choice for implantable devices where fatigue performance is critical.

Q2: Is Gr23 wire suitable for additively manufactured implants?

Yes, Gr23 wire is available for Directed Energy Deposition (DED) and Wire Arc Additive Manufacturing (WAAM) processes. For powder-based AM, please specify your requirements.

Q3: What surface finish is recommended for fatigue-critical implants?

Electropolished surfaces offer the best fatigue performance by removing surface irregularities and creating a uniform, passive oxide layer. Typical fatigue strength improvement is 15-25% over pickled surfaces.

Q4: Do you provide material for sterile implants?

We provide cleanroom-packaged, non-sterile wire suitable for terminal sterilization by the device manufacturer (gamma, EtO, e-beam). For pre-sterilized wire, please contact us to discuss validation requirements.

Q5: What is the shelf life of medical Gr23 wire?

When stored in original sealed packaging under controlled conditions (15-25°C, <50% RH), the wire has an indefinite shelf life. For implantable devices, we recommend re-validation after 5 years per FDA guidance.

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