C18200 Copper vs. R04295 Alloy

C18200 copper belongs to the copper alloys classification, while R04295 alloy belongs to the otherwise unclassified metals. There are 18 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

For each property being compared, the top bar is C18200 copper and the bottom bar is R04295 alloy.

UNS C18200 (CW105C) Chromium 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

Elongation at Break, %		11 to 40
Elongation at Break, %		22

Poisson's Ratio		0.34
Poisson's Ratio		0.38

Shear Modulus, GPa		44
Shear Modulus, GPa		37

Tensile Strength: Ultimate (UTS), MPa		310 to 530
Tensile Strength: Ultimate (UTS), MPa		410

Tensile Strength: Yield (Proof), MPa		97 to 450
Tensile Strength: Yield (Proof), MPa		300

Thermal Properties

Latent Heat of Fusion, J/g		210
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		18
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

Resilience: Ultimate (Unit Rupture Work), MJ/m³		43 to 96
Resilience: Ultimate (Unit Rupture Work), MJ/m³		84

Resilience: Unit (Modulus of Resilience), kJ/m³		40 to 860
Resilience: Unit (Modulus of Resilience), kJ/m³		430

Stiffness to Weight: Axial, points		7.3
Stiffness to Weight: Axial, points		6.3

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

Strength to Weight: Axial, points		9.6 to 16
Strength to Weight: Axial, points		13

Strength to Weight: Bending, points		11 to 16
Strength to Weight: Bending, points		14

Thermal Shock Resistance, points		11 to 18
Thermal Shock Resistance, points		40

Alloy Composition

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

Chromium (Cr), %		0.6 to 1.2
Chromium (Cr), %		0

Copper (Cu), %		98.6 to 99.4
Copper (Cu), %		0

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

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

Iron (Fe), %		0 to 0.1
Iron (Fe), %		0

Lead (Pb), %		0 to 0.050
Lead (Pb), %		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 to 0.1
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

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