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Grade 31 Titanium vs. C71640 Copper-nickel

Grade 31 titanium belongs to the titanium alloys classification, while C71640 copper-nickel belongs to the copper alloys. There are 25 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is grade 31 titanium and the bottom bar is C71640 copper-nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
140
Poisson's Ratio 0.32
0.33
Shear Modulus, GPa 41
52
Tensile Strength: Ultimate (UTS), MPa 510
490 to 630
Tensile Strength: Yield (Proof), MPa 450
190 to 460

Thermal Properties

Latent Heat of Fusion, J/g 420
240
Maximum Temperature: Mechanical, °C 320
260
Melting Completion (Liquidus), °C 1660
1180
Melting Onset (Solidus), °C 1610
1120
Specific Heat Capacity, J/kg-K 540
410
Thermal Conductivity, W/m-K 21
29
Thermal Expansion, µm/m-K 8.7
15

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.4
7.0
Electrical Conductivity: Equal Weight (Specific), % IACS 6.9
7.1

Otherwise Unclassified Properties

Density, g/cm3 4.5
8.9
Embodied Carbon, kg CO2/kg material 36
5.0
Embodied Energy, MJ/kg 600
73
Embodied Water, L/kg 230
280

Common Calculations

Resilience: Unit (Modulus of Resilience), kJ/m3 940
130 to 750
Stiffness to Weight: Axial, points 13
8.7
Stiffness to Weight: Bending, points 35
20
Strength to Weight: Axial, points 32
15 to 20
Strength to Weight: Bending, points 32
16 to 18
Thermal Diffusivity, mm2/s 8.5
8.2
Thermal Shock Resistance, points 39
16 to 21

Alloy Composition

Carbon (C), % 0 to 0.080
0
Cobalt (Co), % 0.2 to 0.8
0
Copper (Cu), % 0
61.7 to 67.8
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.3
1.7 to 2.3
Lead (Pb), % 0
0 to 0.050
Manganese (Mn), % 0
1.5 to 2.5
Nickel (Ni), % 0
29 to 32
Nitrogen (N), % 0 to 0.050
0
Oxygen (O), % 0 to 0.35
0
Palladium (Pd), % 0.040 to 0.080
0
Titanium (Ti), % 97.9 to 99.76
0
Zinc (Zn), % 0
0 to 1.0
Residuals, % 0
0 to 0.5