C18700 Copper vs. Grade 705C Zirconium

C18700 copper belongs to the copper alloys classification, while grade 705C zirconium belongs to the otherwise unclassified metals. There are 20 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.

For each property being compared, the top bar is C18700 copper and the bottom bar is grade 705C zirconium.

UNS C18700 (CW113C) Leaded Copper Grade 705C Cast Zirconium

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		110
Elastic (Young's, Tensile) Modulus, GPa		98

Elongation at Break, %		9.0 to 9.6
Elongation at Break, %		13

Poisson's Ratio		0.34
Poisson's Ratio		0.34

Shear Modulus, GPa		43
Shear Modulus, GPa		36

Tensile Strength: Ultimate (UTS), MPa		290 to 330
Tensile Strength: Ultimate (UTS), MPa		540

Tensile Strength: Yield (Proof), MPa		230 to 250
Tensile Strength: Yield (Proof), MPa		390

Thermal Properties

Latent Heat of Fusion, J/g		210
Latent Heat of Fusion, J/g		250

Specific Heat Capacity, J/kg-K		380
Specific Heat Capacity, J/kg-K		270

Thermal Conductivity, W/m-K		380
Thermal Conductivity, W/m-K		18

Thermal Expansion, µm/m-K		17
Thermal Expansion, µm/m-K		5.7

Otherwise Unclassified Properties

Density, g/cm³		9.0
Density, g/cm³		6.7

Embodied Water, L/kg		310
Embodied Water, L/kg		450

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m³		24 to 29
Resilience: Ultimate (Unit Rupture Work), MJ/m³		66

Resilience: Unit (Modulus of Resilience), kJ/m³		240 to 280
Resilience: Unit (Modulus of Resilience), kJ/m³		790

Stiffness to Weight: Axial, points		7.1
Stiffness to Weight: Axial, points		8.1

Stiffness to Weight: Bending, points		18
Stiffness to Weight: Bending, points		23

Strength to Weight: Axial, points		9.0 to 10
Strength to Weight: Axial, points		22

Strength to Weight: Bending, points		11 to 12
Strength to Weight: Bending, points		22

Thermal Diffusivity, mm²/s		110
Thermal Diffusivity, mm²/s		9.9

Thermal Shock Resistance, points		10 to 12
Thermal Shock Resistance, points		69

Alloy Composition

Carbon (C), %		0
Carbon (C), %		0 to 0.1

Copper (Cu), %		98 to 99.2
Copper (Cu), %		0

Hafnium (Hf), %		0
Hafnium (Hf), %		0 to 4.5

Hydrogen (H), %		0
Hydrogen (H), %		0 to 0.0050

Iron (Fe), %		0
Iron (Fe), %		0 to 0.3

Lead (Pb), %		0.8 to 1.5
Lead (Pb), %		0

Niobium (Nb), %		0
Niobium (Nb), %		2.0 to 3.0

Nitrogen (N), %		0
Nitrogen (N), %		0 to 0.030

Oxygen (O), %		0
Oxygen (O), %		0 to 0.3

Phosphorus (P), %		0
Phosphorus (P), %		0 to 0.010

Zirconium (Zr), %		0
Zirconium (Zr), %		91.9 to 98

Residuals, %		0 to 0.5
Residuals, %		0