C38500 Bronze vs. R60705 Alloy

C38500 bronze belongs to the copper alloys classification, while R60705 alloy belongs to the otherwise unclassified metals. There are 20 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.

For each property being compared, the top bar is C38500 bronze and the bottom bar is R60705 alloy.

UNS C38500 (CW608N) Architectural Bronze UNS R60705 Zirconium-Niobium Alloy

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		100
Elastic (Young's, Tensile) Modulus, GPa		98

Elongation at Break, %		17
Elongation at Break, %		18

Poisson's Ratio		0.31
Poisson's Ratio		0.34

Shear Modulus, GPa		37
Shear Modulus, GPa		37

Tensile Strength: Ultimate (UTS), MPa		370
Tensile Strength: Ultimate (UTS), MPa		540

Tensile Strength: Yield (Proof), MPa		130
Tensile Strength: Yield (Proof), MPa		430

Thermal Properties

Latent Heat of Fusion, J/g		160
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		120
Thermal Conductivity, W/m-K		17

Thermal Expansion, µm/m-K		21
Thermal Expansion, µm/m-K		6.3

Otherwise Unclassified Properties

Density, g/cm³		8.1
Density, g/cm³		6.7

Embodied Water, L/kg		320
Embodied Water, L/kg		450

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m³		48
Resilience: Ultimate (Unit Rupture Work), MJ/m³		90

Resilience: Unit (Modulus of Resilience), kJ/m³		78
Resilience: Unit (Modulus of Resilience), kJ/m³		950

Stiffness to Weight: Axial, points		7.0
Stiffness to Weight: Axial, points		8.1

Stiffness to Weight: Bending, points		19
Stiffness to Weight: Bending, points		23

Strength to Weight: Axial, points		13
Strength to Weight: Axial, points		22

Strength to Weight: Bending, points		14
Strength to Weight: Bending, points		22

Thermal Diffusivity, mm²/s		40
Thermal Diffusivity, mm²/s		9.5

Thermal Shock Resistance, points		12
Thermal Shock Resistance, points		63

Alloy Composition

Carbon (C), %		0
Carbon (C), %		0 to 0.050

Chromium (Cr), %		0
Chromium (Cr), %		0 to 0.2

Copper (Cu), %		55 to 59
Copper (Cu), %		0

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

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

Iron (Fe), %		0 to 0.35
Iron (Fe), %		0 to 0.2

Lead (Pb), %		2.5 to 3.5
Lead (Pb), %		0

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

Nitrogen (N), %		0
Nitrogen (N), %		0 to 0.025

Oxygen (O), %		0
Oxygen (O), %		0 to 0.18

Zinc (Zn), %		36.7 to 42.5
Zinc (Zn), %		0

Zirconium (Zr), %		0
Zirconium (Zr), %		91 to 98

Residuals, %		0 to 0.5
Residuals, %		0