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Grade C-6 Titanium vs. Grade C-3 Titanium

Both grade C-6 titanium and grade C-3 titanium are titanium alloys. Both are furnished in the as-fabricated (no temper or treatment) condition. They have a moderately high 92% of their average alloy composition in common.

For each property being compared, the top bar is grade C-6 titanium and the bottom bar is grade C-3 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 290
200
Elastic (Young's, Tensile) Modulus, GPa 100
110
Elongation at Break, % 9.0
13
Fatigue Strength, MPa 460
260
Poisson's Ratio 0.32
0.32
Rockwell C Hardness 32
21
Shear Modulus, GPa 39
40
Tensile Strength: Ultimate (UTS), MPa 890
500
Tensile Strength: Yield (Proof), MPa 830
430

Thermal Properties

Latent Heat of Fusion, J/g 410
420
Maximum Temperature: Mechanical, °C 310
320
Melting Completion (Liquidus), °C 1580
1660
Melting Onset (Solidus), °C 1530
1610
Specific Heat Capacity, J/kg-K 550
540
Thermal Conductivity, W/m-K 7.8
21
Thermal Expansion, µm/m-K 9.8
8.7

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.2
3.5
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
6.9

Otherwise Unclassified Properties

Base Metal Price, % relative 36
37
Density, g/cm3 4.5
4.5
Embodied Carbon, kg CO2/kg material 30
31
Embodied Energy, MJ/kg 480
510
Embodied Water, L/kg 190
110

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 78
65
Resilience: Unit (Modulus of Resilience), kJ/m3 3300
880
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 35
35
Strength to Weight: Axial, points 55
31
Strength to Weight: Bending, points 46
31
Thermal Diffusivity, mm2/s 3.2
8.5
Thermal Shock Resistance, points 63
39

Alloy Composition

Aluminum (Al), % 4.0 to 6.0
0
Carbon (C), % 0 to 0.1
0 to 0.1
Hydrogen (H), % 0 to 0.015
0 to 0.015
Iron (Fe), % 0 to 0.5
0 to 0.25
Nickel (Ni), % 0 to 0.050
0 to 0.050
Oxygen (O), % 0 to 0.2
0 to 0.4
Tin (Sn), % 2.0 to 3.0
0
Titanium (Ti), % 89.7 to 94
98.8 to 100
Residuals, % 0
0 to 0.4