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C69700 Brass vs. R30155 Cobalt

C69700 brass belongs to the copper alloys classification, while R30155 cobalt belongs to the iron alloys. There are 27 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is C69700 brass and the bottom bar is R30155 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
210
Elongation at Break, % 25
34
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 41
81
Shear Strength, MPa 300
570
Tensile Strength: Ultimate (UTS), MPa 470
850
Tensile Strength: Yield (Proof), MPa 230
390

Thermal Properties

Latent Heat of Fusion, J/g 240
300
Maximum Temperature: Mechanical, °C 160
1100
Melting Completion (Liquidus), °C 930
1470
Melting Onset (Solidus), °C 880
1420
Specific Heat Capacity, J/kg-K 400
450
Thermal Conductivity, W/m-K 43
12
Thermal Expansion, µm/m-K 19
14

Otherwise Unclassified Properties

Base Metal Price, % relative 26
80
Density, g/cm3 8.3
8.5
Embodied Carbon, kg CO2/kg material 2.7
9.7
Embodied Energy, MJ/kg 44
150
Embodied Water, L/kg 310
300

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 99
230
Resilience: Unit (Modulus of Resilience), kJ/m3 250
370
Stiffness to Weight: Axial, points 7.3
14
Stiffness to Weight: Bending, points 19
23
Strength to Weight: Axial, points 16
28
Strength to Weight: Bending, points 16
24
Thermal Diffusivity, mm2/s 13
3.2
Thermal Shock Resistance, points 16
21

Alloy Composition

Carbon (C), % 0
0.080 to 0.16
Chromium (Cr), % 0
20 to 22.5
Cobalt (Co), % 0
18.5 to 21
Copper (Cu), % 75 to 80
0
Iron (Fe), % 0 to 0.2
24.3 to 36.2
Lead (Pb), % 0.5 to 1.5
0
Manganese (Mn), % 0 to 0.4
1.0 to 2.0
Molybdenum (Mo), % 0
2.5 to 3.5
Nickel (Ni), % 0
19 to 21
Niobium (Nb), % 0
0.75 to 1.3
Nitrogen (N), % 0
0 to 0.2
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 2.5 to 3.5
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Tantalum (Ta), % 0
0.75 to 1.3
Tungsten (W), % 0
2.0 to 3.0
Zinc (Zn), % 13.9 to 22
0
Residuals, % 0 to 0.5
0