Alleima® Ti6Al4V ELI Bar

Datasheet updated

2022-06-29 15:02
(supersedes all previous editions)

Alleima® Ti6Al4V ELI is an alpha-beta titanium alloy mainly used for medical implant applications. It is an Extra Low Interstitial alloy with a high purity, which confers improved ductility and fracture toughness.

The grade meets the stringent requirements of all applicable standards for implant materials.

Alleima® Ti6Al4V ELI is characterized by:

  • Excellent biocompatibility
  • Good forgeability
  • Advanced corrosion resistance
  • High strength
  • High purity
  • A high quality surface finish

Standards

  • UNS: R56401

Product standards

  • ASTM F136
  • ISO 5832-3

Chemical composition (nominal) %

N C H Fe O Al V Ti
≤0.05 ≤0.08 ≤0.012 ≤0.25 ≤0.13 5.5 - 6.50 3.5 - 4.5 Balance

Applications

Alleima® Bioline Ti6Al4V ELI is a preferred grade for medical/dental applications because of highly favourable combinattion of biocompatibility, excellent corrosion resistance, high strength and low modulus of elasticity.

Typical applications are joint replacement (hip, knee, shoulder), bone fixation devices, surgical clips, cryogenic vessels, surgical tools

Fabrication

Titanium has a high affinity to oxygen, nitrogen and hydrogen which makes the selection and control of process parameters critical to avoid brittleness.

Titanium reacts at high temperatures and burns readily in the presence of oxygen. Elevated temperature processing, therefore, must be carried out under special conditions (inert atmosphere for high temperature processing and melting under vacuum), in order to avoid diffusion of gasses into the titanium metal.

Titanium can be casted, but it must be done in a vacuum furnace because of its reactive nature.

Machining at room temperature needs to be performed under controlled conditions with adapted tooling to avoid galling or seizing of cutting tools.

Electrochemical machining and laser cutting are becoming more common in the machining of Titanium.

Workability

Alleima® Bioline Ti6Al4V ELI can be hot worked by rolling, forging, extrusion or pressing, and can also be cold drawn.

Typically, hot working is carried out in the alpha-beta temperature range (850 to 960 °C (1560- 1760 oF).

Forms of supply

Finishes and dimensions

Alleima® Bioline Ti6Al4V ELI alloy bar is produced in a large number of sizes within a standard size range comprising of 19-55 mm diameter. Smaller and larger sizes can be supplied on request.

Titanium alloy bar is supplied in the annealed condition with a belt grinded or peel turned surface. Other surface finishes are also available on request.

Lengths

Bars are delivered in lengths of 2.0-6.0 m, depending on customer requirements.

Tolerance width
Diameter Standard tolerance width
mm mm
19-30 +0 / -0.130
30-50 +0 / -0.160
50-55 +0 / -0.190

Other tolerances can be produced on request.

Surface conditions
Surface conditions Diameter
mm
Belt grinded <35
Peel turned >35

Mechanical properties

At 20°C (68 oF), typical data
Proof strength Tensile strength Elongation Reduction of area Hardness
Rp0,2 Rm in 4 D % in 5 D % % Rockwell C
MPa MPa ASTM req ISO req
870 940 16 15 39 31
At 20°C (68 oF), values according to ASTM F136
Size
Proof strength
Tensile strength
Elongation Reduction of area
Rp0,2 Rm in 4 D
mm MPa ksi MPa ksi % %
≤ 44.45 ≥795 ≥115 ≥860 ≥125 ≥10 ≥25
> 44.45 ≤ 63.50 ≥760 ≥110 ≥825 ≥120 ≥8 ≥20

Physical properties

Typical data
Property
Density ( 20°C)
4.42 g/cm3 0.16 lb/in3
Modulus of elasticity, (20°C)
114 GPa 17 X 103 ksi
Specific heat capacity (20°C)
0.56 J/(g °C) 0.13 Btu/(lb°F)
Thermal conductivity (20°C)
7.2 W /(m°C) 4.2 Btu/(ft h°F)
Thermal expansion, x10-6 (0-100°C)
8.8 per °C 4.9 per °F

Machining

General turning
Cutting speed recommendations
The recommendations are valid for use with cutting fluid
and a specific cutting force kc 1, 0.4 = 1700 MPa
Carbide tool (insert) - ALLEIMA COROMANT REFERENCES

Carbide tool (insert) ALLEIMA COROMANT REFERENCES H10 H10A H13A H10F GC1025
Titanium alloys Rm
MPa
Feed, mm/rev Cutting speed, vc m/min
α, near α and α+β alloys, annealed 950 0.1 85 80 75 65 65
0.2 70
0.3 55 65 60 55 55
0.5 55 50 45 45
α+βalloys in aged conditions, βalloys, annealed or aged 1050 0.1 80 80 70 65 65
0.2 60
0.3 50 60 55 50 50
0.5 50 45 40 40


Parting and Grooving
Corocut family (CoroCut and T-Max Q-Cut)®
The recommendations are valid for use with cutting fluid.
Note!( For internal grooving , face grooving and undercutting, the speed should be reduced by 30-40%)

Carbide tool (insert) ALLEIMA COROMANT REFERENCES H10 H13A GC4125
Titanium alloys Specific cutting
force kc , 0.4 MPa
Rm
MPa
Feed, mm/rev Cutting speed, vc m/min
α, near αandα+β alloys, annealed 1675 950 0.05 80 70 70
0.3 65 80 38
α+β alloys in aged conditions, β alloys, annealed or aged 1690 1050 0.05 70 85 65
0.3 65 55 33


Threading
Cutting speed recommendations

Carbide tool (insert) - SANDVIK COROMANT REFERENCES GC1020 GC4125 H13A
Titanium alloys Rm
MPa
Cutting speed, vc, m/min
α, near a and α+βalloys, annealed 950 60 65 50
α, near a and α+βalloys in aged conditions, βalloys, annealed or aged alloys, annealed 1050 50 55 40


Drilling - Solid carbide
CoroDrill® Delta-C for drill diameters 3 -20 mm

Titanium alloys Rm
MPa
Grades Cutting speed, vc,
m/min
Drill diameter, mm
3.00 - 6.00 6.01 - 10.00 10.01 - 14.00 14.01 - 20.00
Feed, fn, mm/rev
α, near αand α+β alloys, annealed 850 1220 20 - 60 0.06 - 0.12 0.08 - 0.20 0.14 - 0.28 0.16 - 0.30
α+βalloys in aged conditions, βalloys, annealed or aged alloys, annealed 1050 1220 20 - 60 0.06 - 0.12 0.08 - 0.20 0.14 - 0.28 0.16 - 0.30


Corodrill® Delta-C R840 for drill diameters 0.30 - 2.90 mm

Titanium alloys Rm
MPa
Grade Cutting speed vc, m/min Drill diameter, mm
0.30 - 1.40
Feed, fn, mm/rev
Grade Cutting speed vc
m/min
1.50 - 2.90
Feed, fn, mm/r
α, nearα and α+β alloys, annealed 850 H10F 4 - 17 0.0023 - 0.01 1020 30 - 40 0.02 - 0.04
α+β alloys in aged conditions, βalloys, annealed or aged alloys, annealed 1050 H10F 3 - 13 0.0015 - 0.007 1020 30 - 40 0.02 - 0.04


Milling - Solid carbide
Coromill® plura
Grade : GC1620
Recommendations for roughing condition :
Speed : 55 - 70 m/min
Feed : 0.05 - 0.12
Milling - Carbide tools (insert)
Specific cutting force kc 1 = 1400 MPa
mc = 0.23
Carbide tool (insert) - SANDVIK COROMANT REFERENCES

Carbide tool (insert) - ALLEIMA COROMANT REFERENCES GC1025 GC1030 H13A H10F GC2030 GC2040
Titanium alloys Rm
MPa
Max chip thickness
hex, mm
Cutting speed, vc m/min
α, near α and α+β alloys, annealed 950 0.05 80 75 75
0.1 80 75 65
0.15 75 75 70 65 70 70
0.2 75 75 70 65 70
0.25 70
α+βalloys in aged conditions 1050 0.05 65 60 60
0.1 65 60 55
0.15 60 60 60 55 60 60
0.2 60 60 60 55 55
0.25 55

Disclaimer: Sandvik is not providing any products or services that are intended or may be construed to be recommending or otherwise advising on, in any manner, the design, suitability, appropriateness or effectiveness, from a medical/biological/safety perspective, of any medical material, instrument and/or medical device.