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C70250 Copper vs. Grade 21 Titanium

C70250 copper belongs to the copper alloys classification, while grade 21 titanium belongs to the titanium alloys. There are 22 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is C70250 copper and the bottom bar is grade 21 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 120
140
Poisson's Ratio 0.34
0.32
Shear Modulus, GPa 44
51
Tensile Strength: Ultimate (UTS), MPa 520 to 740
890 to 1340

Thermal Properties

Latent Heat of Fusion, J/g 220
410
Maximum Temperature: Mechanical, °C 210
310
Melting Completion (Liquidus), °C 1100
1740
Melting Onset (Solidus), °C 1080
1690
Specific Heat Capacity, J/kg-K 390
500
Thermal Conductivity, W/m-K 170
7.5
Thermal Expansion, µm/m-K 17
7.1

Otherwise Unclassified Properties

Base Metal Price, % relative 31
60
Density, g/cm3 8.9
5.4
Embodied Carbon, kg CO2/kg material 2.9
32
Embodied Energy, MJ/kg 45
490
Embodied Water, L/kg 310
180

Common Calculations

Stiffness to Weight: Axial, points 7.4
14
Stiffness to Weight: Bending, points 18
32
Strength to Weight: Axial, points 16 to 23
46 to 69
Strength to Weight: Bending, points 16 to 21
38 to 50
Thermal Diffusivity, mm2/s 49
2.8
Thermal Shock Resistance, points 18 to 26
66 to 100

Alloy Composition

Aluminum (Al), % 0
2.5 to 3.5
Carbon (C), % 0
0 to 0.050
Copper (Cu), % 92.7 to 97.5
0
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 0
0 to 0.4
Lead (Pb), % 0 to 0.050
0
Magnesium (Mg), % 0.050 to 0.3
0
Manganese (Mn), % 0 to 0.1
0
Molybdenum (Mo), % 0
14 to 16
Nickel (Ni), % 2.2 to 4.2
0
Niobium (Nb), % 0
2.2 to 3.2
Nitrogen (N), % 0
0 to 0.030
Oxygen (O), % 0
0 to 0.17
Silicon (Si), % 0.25 to 1.2
0.15 to 0.25
Titanium (Ti), % 0
76 to 81.2
Zinc (Zn), % 0 to 1.0
0
Residuals, % 0
0 to 0.4

Comparable Variants