C69700 Brass vs. R30001 Cobalt

C69700 brass belongs to the copper alloys classification, while R30001 cobalt belongs to the cobalt alloys. There are 21 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 C69700 brass and the bottom bar is R30001 cobalt.

UNS C69700 Leaded Silicon Brass UNS R30001 Co-Cr-W Alloy

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		110
Elastic (Young's, Tensile) Modulus, GPa		220

Elongation at Break, %		25
Elongation at Break, %		1.0

Poisson's Ratio		0.32
Poisson's Ratio		0.28

Shear Modulus, GPa		41
Shear Modulus, GPa		86

Tensile Strength: Ultimate (UTS), MPa		470
Tensile Strength: Ultimate (UTS), MPa		620

Thermal Properties

Latent Heat of Fusion, J/g		240
Latent Heat of Fusion, J/g		310

Melting Completion (Liquidus), °C		930
Melting Completion (Liquidus), °C		1530

Melting Onset (Solidus), °C		880
Melting Onset (Solidus), °C		1260

Specific Heat Capacity, J/kg-K		400
Specific Heat Capacity, J/kg-K		430

Thermal Conductivity, W/m-K		43
Thermal Conductivity, W/m-K		15

Thermal Expansion, µm/m-K		19
Thermal Expansion, µm/m-K		11

Otherwise Unclassified Properties

Density, g/cm³		8.3
Density, g/cm³		9.0

Embodied Carbon, kg CO₂/kg material		2.7
Embodied Carbon, kg CO₂/kg material		8.9

Embodied Energy, MJ/kg		44
Embodied Energy, MJ/kg		130

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

Common Calculations

Stiffness to Weight: Axial, points		7.3
Stiffness to Weight: Axial, points		14

Stiffness to Weight: Bending, points		19
Stiffness to Weight: Bending, points		22

Strength to Weight: Axial, points		16
Strength to Weight: Axial, points		19

Strength to Weight: Bending, points		16
Strength to Weight: Bending, points		18

Thermal Diffusivity, mm²/s		13
Thermal Diffusivity, mm²/s		3.7

Thermal Shock Resistance, points		16
Thermal Shock Resistance, points		19

Alloy Composition

Carbon (C), %		0
Carbon (C), %		2.0 to 3.0

Chromium (Cr), %		0
Chromium (Cr), %		28 to 32

Cobalt (Co), %		0
Cobalt (Co), %		43 to 59

Copper (Cu), %		75 to 80
Copper (Cu), %		0

Iron (Fe), %		0 to 0.2
Iron (Fe), %		0 to 3.0

Lead (Pb), %		0.5 to 1.5
Lead (Pb), %		0

Manganese (Mn), %		0 to 0.4
Manganese (Mn), %		0

Molybdenum (Mo), %		0
Molybdenum (Mo), %		0 to 1.0

Nickel (Ni), %		0
Nickel (Ni), %		0 to 3.0

Silicon (Si), %		2.5 to 3.5
Silicon (Si), %		0 to 2.0

Tungsten (W), %		0
Tungsten (W), %		11 to 13

Zinc (Zn), %		13.9 to 22
Zinc (Zn), %		0

Residuals, %		0 to 0.5
Residuals, %		0