R05255 Alloy vs. C71500 Copper-nickel

R05255 alloy belongs to the otherwise unclassified metals classification, while C71500 copper-nickel belongs to the copper alloys. There are 16 material properties with values for both materials. Properties with values for just one material (14, in this case) are not shown.

For each property being compared, the top bar is R05255 alloy and the bottom bar is C71500 copper-nickel.

UNS R05255 Tantalum-Tungsten Alloy UNS C71500 (CW354H) Copper-Nickel

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		190
Elastic (Young's, Tensile) Modulus, GPa		140

Poisson's Ratio		0.34
Poisson's Ratio		0.33

Shear Modulus, GPa		70
Shear Modulus, GPa		52

Tensile Strength: Ultimate (UTS), MPa		540
Tensile Strength: Ultimate (UTS), MPa		380 to 620

Thermal Properties

Latent Heat of Fusion, J/g		140
Latent Heat of Fusion, J/g		230

Specific Heat Capacity, J/kg-K		140
Specific Heat Capacity, J/kg-K		400

Thermal Conductivity, W/m-K		59
Thermal Conductivity, W/m-K		28

Thermal Expansion, µm/m-K		6.6
Thermal Expansion, µm/m-K		16

Otherwise Unclassified Properties

Density, g/cm³		17
Density, g/cm³		8.9

Embodied Water, L/kg		630
Embodied Water, L/kg		280

Common Calculations

Stiffness to Weight: Axial, points		6.3
Stiffness to Weight: Axial, points		8.6

Stiffness to Weight: Bending, points		11
Stiffness to Weight: Bending, points		19

Strength to Weight: Axial, points		9.1
Strength to Weight: Axial, points		12 to 19

Strength to Weight: Bending, points		8.9
Strength to Weight: Bending, points		13 to 18

Thermal Diffusivity, mm²/s		25
Thermal Diffusivity, mm²/s		7.7

Thermal Shock Resistance, points		31
Thermal Shock Resistance, points		12 to 20

Alloy Composition

Carbon (C), %		0 to 0.010
Carbon (C), %		0

Copper (Cu), %		0
Copper (Cu), %		63.5 to 70.6

Hydrogen (H), %		0 to 0.0015
Hydrogen (H), %		0

Iron (Fe), %		0 to 0.010
Iron (Fe), %		0.4 to 1.0

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

Manganese (Mn), %		0
Manganese (Mn), %		0 to 1.0

Molybdenum (Mo), %		0 to 0.020
Molybdenum (Mo), %		0

Nickel (Ni), %		0 to 0.010
Nickel (Ni), %		29 to 33

Niobium (Nb), %		0 to 0.5
Niobium (Nb), %		0

Nitrogen (N), %		0 to 0.010
Nitrogen (N), %		0

Oxygen (O), %		0 to 0.015
Oxygen (O), %		0

Silicon (Si), %		0 to 0.0050
Silicon (Si), %		0

Tantalum (Ta), %		95.9 to 98
Tantalum (Ta), %		0

Titanium (Ti), %		0 to 0.010
Titanium (Ti), %		0

Tungsten (W), %		2.0 to 3.5
Tungsten (W), %		0

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

Residuals, %		0
Residuals, %		0 to 0.5