ASTM F136/Uns R56401/Ti 6al-4V Eli Dental Implants Alloy Medical Materials Titanium Alloy Pipe/Tube

Product Description

Product Description
Introduction Ti 6Al-4V ELI Titanium Alloy is the extra-low interstitial version of Ti 6Al-4V Titanium Alloy and its content is arrived at by the careful selection of ingot raw materials with lower specified limits on iron and the interstitial elements C and O. It has been the material of choice for many medical and dental applications due to its excellent biocompatibility, good fatigue strength, and low modulus. The ELI grade has superior damage tolerance (fracture toughness, fatigue crack growth rate) and better mechanical properties at cryogenic temperatures compared to standard grade Ti 6Al-4V Titanium Alloy. The high-purity alloy is also known as ASTM B348 Grade 23.
Composition The chemical composition of grade 23 Ti 6Al 4V ELI Titanium alloy is outlined in the following table.

Element	Content
Titanium, Ti	88.09 - 91
Aluminum, Al	5.5 - 6.5
Vanadium, V	3.5 - 4.5
Iron, Fe	≤ 0.25
Carbon, C	≤ 0.080
Nitrogen, N	≤ 0.030
Hydrogen, H	≤ 0.0125
Other, each	≤ 0.10
Other, total	≤ 0.40

Grade Specification

Grade	UNS	DIN	EN	AMS	ASTM		JIS
Ti 6Al 4V ELI	UNS R56401	-		AMS 4907 AMS 4931 AMS 4930 AMS 4956	ASTM F136 ASTM F467 ASTM F468		-

Physical Properties The physical properties of grade 23 Ti 6Al 4V ELI Titanium alloy are tabulated below.

Properties	Metric	Imperial
Density	4.43 g/cm3	0.160 lb/in3
Melting point	1604 - 1660°C	2919 - 3020°F

Mechanical Properties The following table shows mechanical properties of grade 23 Ti 6Al 4V ELI Titanium alloy.

Properties	Metric	Imperial
Tensile strength	860 MPa	125000 psi
Yield strength	790 MPa	115000 psi
Poisson's ratio	0.342	0.342
Elastic modulus	113.8 GPa	16510 ksi
Shear modulus	44.0 GPa	6380 ksi
Elongation at break	15%	15%
Hardness, Brinell	326	326
Hardness, Knoop	354	354
Hardness, Rockwell C	35	35
Hardness, Vickers	341	341

Thermal Properties The thermal properties of grade 23 Ti 6Al 4V ELI Titanium alloy are tabulated below.

Properties	Metric	Imperial
Thermal expansion co-efficient (@20-100°C/68-212°F)	8.60 µm/m°C	4.78 µin/in°F
Thermal conductivity	6.70 W/mK	46.5 BTU in/hr.ft².°F

Fabrication and Heat Treatment
Machinability
Grade 23 Ti 6Al 4V ELI Titanium alloy can be machined using slow speeds, right quantity of coolant flow and high feed rates. High-speed tools should be used for tooling this alloy and the recommended tool types are tungsten carbide designations C1-C4 or cobalt based. Forming
Grade 23 Ti 6Al 4V ELI Titanium alloy can be hot or cold formed. Forming techniques include hydropress, stretch or drop-hammer. Welding
Weldability of grade 23 Ti 6Al 4V ELI Titanium alloy is rated as fair. Heat Treatment
The material can be solution treated at 904-954 °C (1660-1750°F) for 2 h, and then water quenched. Annealing
For annealing grade 23 Ti 6Al 4V ELI Titanium alloy, the material has to be held at 732°C (1350°F) for about 1/4 and 4h. It should then be furnace cooled to 566°C (1050°F) then air cooled. Forging
Rough forging can be performed at 982°C (1800°F), and completed at 968°C (1750°F). Hot Working
Hot working enhances the overall ductility of the material. Cold Working
Cold working features of this material is same as that of austenitic stainless steel. Post-work annealing is recommended to re-attain favorable performance properties. Aging
Aging of grade 23 Ti 6Al 4V ELI Titanium alloy can be performed at 538°C (1000°F) for 4 h and air cooled.
Applications6Al-4V ELI (Ti-6Al-4V ELI) Titanium Alloy has a wide range of applications in the medical field, especially in medical devices and implants.
6Al-4V ELI titanium alloy has good biocompatibility and can coexist harmoniously with human tissues, reducing the occurrence of rejection reactions. Therefore, it is often used to manufacture some precision medical devices, such as artificial joints and bone plates.
In addition, the application of 6Al-4V ELI titanium alloy in the medical field also includes surgical implants, such as TC4ELI medical titanium alloy. This alloy has a wide range of applications in the medical field because it has good plasticity, toughness, welding performance and low-temperature performance. Surface Treatment
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