C23400 Brass vs. R31538 Cobalt

C23400 brass belongs to the copper alloys classification, while R31538 cobalt belongs to the cobalt alloys. There are 20 material properties with values for both materials. Properties with values for just one material (13, in this case) are not shown.

For each property being compared, the top bar is C23400 brass and the bottom bar is R31538 cobalt.

UNS C23400 Red Brass High Carbon Co-28Cr-6Mo Alloy (ASTM F1537 Alloy 2, ISO 5832-12 Alloy 2, R31538)

Metric UnitsUS Customary Units

Mechanical Properties

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

Poisson's Ratio		0.32
Poisson's Ratio		0.29

Shear Modulus, GPa		42
Shear Modulus, GPa		86

Tensile Strength: Ultimate (UTS), MPa		370 to 640
Tensile Strength: Ultimate (UTS), MPa		1020 to 1360

Thermal Properties

Latent Heat of Fusion, J/g		190
Latent Heat of Fusion, J/g		320

Melting Completion (Liquidus), °C		970
Melting Completion (Liquidus), °C		1360

Melting Onset (Solidus), °C		930
Melting Onset (Solidus), °C		1290

Specific Heat Capacity, J/kg-K		390
Specific Heat Capacity, J/kg-K		450

Thermal Conductivity, W/m-K		120
Thermal Conductivity, W/m-K		13

Thermal Expansion, µm/m-K		19
Thermal Expansion, µm/m-K		13

Otherwise Unclassified Properties

Density, g/cm³		8.5
Density, g/cm³		8.4

Embodied Carbon, kg CO₂/kg material		2.6
Embodied Carbon, kg CO₂/kg material		8.1

Embodied Energy, MJ/kg		43
Embodied Energy, MJ/kg		110

Embodied Water, L/kg		320
Embodied Water, L/kg		530

Common Calculations

Stiffness to Weight: Axial, points		7.2
Stiffness to Weight: Axial, points		15

Stiffness to Weight: Bending, points		19
Stiffness to Weight: Bending, points		24

Strength to Weight: Axial, points		12 to 21
Strength to Weight: Axial, points		34 to 45

Strength to Weight: Bending, points		13 to 19
Strength to Weight: Bending, points		27 to 32

Thermal Diffusivity, mm²/s		36
Thermal Diffusivity, mm²/s		3.5

Thermal Shock Resistance, points		12 to 22
Thermal Shock Resistance, points		25 to 33

Alloy Composition

Carbon (C), %		0
Carbon (C), %		0.15 to 0.35

Chromium (Cr), %		0
Chromium (Cr), %		26 to 30

Cobalt (Co), %		0
Cobalt (Co), %		58.7 to 68.9

Copper (Cu), %		81 to 84
Copper (Cu), %		0

Iron (Fe), %		0 to 0.050
Iron (Fe), %		0 to 0.75

Lead (Pb), %		0 to 0.050
Lead (Pb), %		0

Manganese (Mn), %		0
Manganese (Mn), %		0 to 1.0

Molybdenum (Mo), %		0
Molybdenum (Mo), %		5.0 to 7.0

Nickel (Ni), %		0
Nickel (Ni), %		0 to 1.0

Nitrogen (N), %		0
Nitrogen (N), %		0 to 0.25

Silicon (Si), %		0
Silicon (Si), %		0 to 1.0

Zinc (Zn), %		15.7 to 19
Zinc (Zn), %		0

Residuals, %		0 to 0.2
Residuals, %		0