C70250 Copper vs. R04295 Alloy

C70250 copper belongs to the copper alloys classification, while R04295 alloy belongs to the otherwise unclassified metals. There are 14 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 C70250 copper and the bottom bar is R04295 alloy.

UNS C70250 (CW112C) Nickel-Silicon Copper UNS R04295 Niobium-Hafnium Alloy

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		120
Elastic (Young's, Tensile) Modulus, GPa		100

Poisson's Ratio		0.34
Poisson's Ratio		0.38

Shear Modulus, GPa		44
Shear Modulus, GPa		37

Tensile Strength: Ultimate (UTS), MPa		520 to 740
Tensile Strength: Ultimate (UTS), MPa		410

Thermal Properties

Latent Heat of Fusion, J/g		220
Latent Heat of Fusion, J/g		300

Specific Heat Capacity, J/kg-K		390
Specific Heat Capacity, J/kg-K		260

Thermal Expansion, µm/m-K		17
Thermal Expansion, µm/m-K		7.2

Otherwise Unclassified Properties

Density, g/cm³		8.9
Density, g/cm³		9.0

Embodied Water, L/kg		310
Embodied Water, L/kg		950

Common Calculations

Stiffness to Weight: Axial, points		7.4
Stiffness to Weight: Axial, points		6.3

Stiffness to Weight: Bending, points		18
Stiffness to Weight: Bending, points		17

Strength to Weight: Axial, points		16 to 23
Strength to Weight: Axial, points		13

Strength to Weight: Bending, points		16 to 21
Strength to Weight: Bending, points		14

Thermal Shock Resistance, points		18 to 26
Thermal Shock Resistance, points		40

Alloy Composition

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Carbon (C), %		0
Carbon (C), %		0 to 0.015

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

Hafnium (Hf), %		0
Hafnium (Hf), %		9.0 to 11

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

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

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

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

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

Niobium (Nb), %		0
Niobium (Nb), %		85.9 to 90.3

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

Oxygen (O), %		0
Oxygen (O), %		0 to 0.025

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

Tantalum (Ta), %		0
Tantalum (Ta), %		0 to 0.5

Titanium (Ti), %		0
Titanium (Ti), %		0.7 to 1.3

Tungsten (W), %		0
Tungsten (W), %		0 to 0.5

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

Zirconium (Zr), %		0
Zirconium (Zr), %		0 to 0.7

Residuals, %		0 to 0.5
Residuals, %		0