C18200 Copper vs. R05240 Alloy

C18200 copper belongs to the copper alloys classification, while R05240 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 R05240 alloy.

UNS C18200 (CW105C) Chromium Copper UNS R05240 Tantalum-Niobium Alloy

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		120
Elastic (Young's, Tensile) Modulus, GPa		150

Elongation at Break, %		11 to 40
Elongation at Break, %		25

Poisson's Ratio		0.34
Poisson's Ratio		0.36

Shear Modulus, GPa		44
Shear Modulus, GPa		57

Tensile Strength: Ultimate (UTS), MPa		310 to 530
Tensile Strength: Ultimate (UTS), MPa		270

Tensile Strength: Yield (Proof), MPa		97 to 450
Tensile Strength: Yield (Proof), MPa		170

Thermal Properties

Latent Heat of Fusion, J/g		210
Latent Heat of Fusion, J/g		210

Specific Heat Capacity, J/kg-K		390
Specific Heat Capacity, J/kg-K		190

Thermal Expansion, µm/m-K		18
Thermal Expansion, µm/m-K		6.8

Otherwise Unclassified Properties

Density, g/cm³		8.9
Density, g/cm³		14

Embodied Water, L/kg		310
Embodied Water, L/kg		460

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m³		43 to 96
Resilience: Ultimate (Unit Rupture Work), MJ/m³		59

Resilience: Unit (Modulus of Resilience), kJ/m³		40 to 860
Resilience: Unit (Modulus of Resilience), kJ/m³		90

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		13

Strength to Weight: Axial, points		9.6 to 16
Strength to Weight: Axial, points		5.4

Strength to Weight: Bending, points		11 to 16
Strength to Weight: Bending, points		6.8

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

Alloy Composition

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

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

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

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

Iron (Fe), %		0 to 0.1
Iron (Fe), %		0 to 0.010

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

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

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

Niobium (Nb), %		0
Niobium (Nb), %		35 to 42

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

Oxygen (O), %		0
Oxygen (O), %		0 to 0.020

Silicon (Si), %		0 to 0.1
Silicon (Si), %		0 to 0.0050

Tantalum (Ta), %		0
Tantalum (Ta), %		57.9 to 65

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

Tungsten (W), %		0
Tungsten (W), %		0 to 0.050