C52100 Bronze vs. R05255 Alloy

C52100 bronze belongs to the copper alloys classification, while R05255 alloy belongs to the otherwise unclassified metals. There are 16 material properties with values for both materials. Properties with values for just one material (14, in this case) are not shown.

For each property being compared, the top bar is C52100 bronze and the bottom bar is R05255 alloy.

UNS C52100 (CW453K) Phosphor Bronze UNS R05255 Tantalum-Tungsten Alloy

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		110
Elastic (Young's, Tensile) Modulus, GPa		190

Poisson's Ratio		0.34
Poisson's Ratio		0.34

Shear Modulus, GPa		41
Shear Modulus, GPa		70

Tensile Strength: Ultimate (UTS), MPa		380 to 800
Tensile Strength: Ultimate (UTS), MPa		540

Thermal Properties

Latent Heat of Fusion, J/g		200
Latent Heat of Fusion, J/g		140

Specific Heat Capacity, J/kg-K		370
Specific Heat Capacity, J/kg-K		140

Thermal Conductivity, W/m-K		62
Thermal Conductivity, W/m-K		59

Thermal Expansion, µm/m-K		18
Thermal Expansion, µm/m-K		6.6

Otherwise Unclassified Properties

Density, g/cm³		8.8
Density, g/cm³		17

Embodied Water, L/kg		370
Embodied Water, L/kg		630

Common Calculations

Stiffness to Weight: Axial, points		7.0
Stiffness to Weight: Axial, points		6.3

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

Strength to Weight: Axial, points		12 to 25
Strength to Weight: Axial, points		9.1

Strength to Weight: Bending, points		13 to 22
Strength to Weight: Bending, points		8.9

Thermal Diffusivity, mm²/s		19
Thermal Diffusivity, mm²/s		25

Thermal Shock Resistance, points		14 to 28
Thermal Shock Resistance, points		31

Alloy Composition

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

Copper (Cu), %		89.8 to 93
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), %		0 to 0.5

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

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

Phosphorus (P), %		0.030 to 0.35
Phosphorus (P), %		0

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

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

Tin (Sn), %		7.0 to 9.0
Tin (Sn), %		0

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

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

Zinc (Zn), %		0 to 0.2
Zinc (Zn), %		0

Residuals, %		0 to 0.5
Residuals, %		0