C11100 Copper vs. R05255 Alloy

C11100 copper belongs to the copper alloys classification, while R05255 alloy belongs to the otherwise unclassified metals. 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 C11100 copper and the bottom bar is R05255 alloy.

UNS C11100 Electrolytic Tough Pitch Copper UNS R05255 Tantalum-Tungsten Alloy

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		120
Elastic (Young's, Tensile) Modulus, GPa		190

Elongation at Break, %		1.5
Elongation at Break, %		20

Poisson's Ratio		0.34
Poisson's Ratio		0.34

Shear Modulus, GPa		44
Shear Modulus, GPa		70

Tensile Strength: Ultimate (UTS), MPa		460
Tensile Strength: Ultimate (UTS), MPa		540

Tensile Strength: Yield (Proof), MPa		420
Tensile Strength: Yield (Proof), MPa		450

Thermal Properties

Latent Heat of Fusion, J/g		210
Latent Heat of Fusion, J/g		140

Specific Heat Capacity, J/kg-K		390
Specific Heat Capacity, J/kg-K		140

Thermal Conductivity, W/m-K		390
Thermal Conductivity, W/m-K		59

Thermal Expansion, µm/m-K		17
Thermal Expansion, µm/m-K		6.6

Otherwise Unclassified Properties

Density, g/cm³		9.0
Density, g/cm³		17

Embodied Water, L/kg		310
Embodied Water, L/kg		630

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m³		6.6
Resilience: Ultimate (Unit Rupture Work), MJ/m³		100

Resilience: Unit (Modulus of Resilience), kJ/m³		750
Resilience: Unit (Modulus of Resilience), kJ/m³		530

Stiffness to Weight: Axial, points		7.2
Stiffness to Weight: Axial, points		6.3

Stiffness to Weight: Bending, points		18
Stiffness to Weight: Bending, points		11

Strength to Weight: Axial, points		14
Strength to Weight: Axial, points		9.1

Strength to Weight: Bending, points		15
Strength to Weight: Bending, points		8.9

Thermal Diffusivity, mm²/s		110
Thermal Diffusivity, mm²/s		25

Thermal Shock Resistance, points		16
Thermal Shock Resistance, points		31

Alloy Composition

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

Copper (Cu), %		99.9 to 100
Copper (Cu), %		0

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

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

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

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

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

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

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

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

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

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

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

Residuals, %		0 to 0.1
Residuals, %		0