Class 4 Tungsten vs. C70250 Copper

Class 4 tungsten belongs to the otherwise unclassified metals classification, while C70250 copper belongs to the copper alloys. There are 20 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 class 4 tungsten and the bottom bar is C70250 copper.

Class 4 Tungsten UNS C70250 (CW112C) Nickel-Silicon Copper

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		270
Elastic (Young's, Tensile) Modulus, GPa		120

Poisson's Ratio		0.28
Poisson's Ratio		0.34

Shear Modulus, GPa		110
Shear Modulus, GPa		44

Tensile Strength: Ultimate (UTS), MPa		790
Tensile Strength: Ultimate (UTS), MPa		520 to 740

Thermal Properties

Latent Heat of Fusion, J/g		170
Latent Heat of Fusion, J/g		220

Specific Heat Capacity, J/kg-K		130
Specific Heat Capacity, J/kg-K		390

Thermal Conductivity, W/m-K		30
Thermal Conductivity, W/m-K		170

Thermal Expansion, µm/m-K		4.5
Thermal Expansion, µm/m-K		17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS		17
Electrical Conductivity: Equal Volume, % IACS		36 to 50

Electrical Conductivity: Equal Weight (Specific), % IACS		9.7
Electrical Conductivity: Equal Weight (Specific), % IACS		37 to 51

Otherwise Unclassified Properties

Density, g/cm³		16
Density, g/cm³		8.9

Embodied Carbon, kg CO₂/kg material		24
Embodied Carbon, kg CO₂/kg material		2.9

Embodied Energy, MJ/kg		360
Embodied Energy, MJ/kg		45

Embodied Water, L/kg		150
Embodied Water, L/kg		310

Common Calculations

Stiffness to Weight: Axial, points		9.6
Stiffness to Weight: Axial, points		7.4

Stiffness to Weight: Bending, points		14
Stiffness to Weight: Bending, points		18

Strength to Weight: Axial, points		14
Strength to Weight: Axial, points		16 to 23

Strength to Weight: Bending, points		12
Strength to Weight: Bending, points		16 to 21

Thermal Diffusivity, mm²/s		15
Thermal Diffusivity, mm²/s		49

Thermal Shock Resistance, points		46
Thermal Shock Resistance, points		18 to 26

Alloy Composition

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Copper (Cu), %		0
Copper (Cu), %		92.7 to 97.5

Lead (Pb), %		0
Lead (Pb), %		0 to 0.050

Magnesium (Mg), %		0
Magnesium (Mg), %		0.050 to 0.3

Manganese (Mn), %		0
Manganese (Mn), %		0 to 0.1

Nickel (Ni), %		0
Nickel (Ni), %		2.2 to 4.2

Silicon (Si), %		0
Silicon (Si), %		0.25 to 1.2

Tungsten (W), %		97
Tungsten (W), %		0

Zinc (Zn), %		0
Zinc (Zn), %		0 to 1.0

Residuals, %		3.0
Residuals, %		0 to 0.5