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CC755S Brass vs. R30155 Cobalt

CC755S 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 (7, in this case) are not shown.

For each property being compared, the top bar is CC755S brass and the bottom bar is R30155 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 110
220
Elastic (Young's, Tensile) Modulus, GPa 100
210
Elongation at Break, % 9.5
34
Poisson's Ratio 0.31
0.29
Shear Modulus, GPa 40
81
Tensile Strength: Ultimate (UTS), MPa 390
850
Tensile Strength: Yield (Proof), MPa 250
390

Thermal Properties

Latent Heat of Fusion, J/g 170
300
Maximum Temperature: Mechanical, °C 120
1100
Melting Completion (Liquidus), °C 820
1470
Melting Onset (Solidus), °C 780
1420
Specific Heat Capacity, J/kg-K 390
450
Thermal Conductivity, W/m-K 120
12
Thermal Expansion, µm/m-K 21
14

Otherwise Unclassified Properties

Base Metal Price, % relative 23
80
Density, g/cm3 8.1
8.5
Embodied Carbon, kg CO2/kg material 2.7
9.7
Embodied Energy, MJ/kg 46
150
Embodied Water, L/kg 330
300

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 33
230
Resilience: Unit (Modulus of Resilience), kJ/m3 290
370
Stiffness to Weight: Axial, points 7.1
14
Stiffness to Weight: Bending, points 19
23
Strength to Weight: Axial, points 14
28
Strength to Weight: Bending, points 15
24
Thermal Diffusivity, mm2/s 38
3.2
Thermal Shock Resistance, points 13
21

Alloy Composition

Aluminum (Al), % 0.4 to 0.7
0
Carbon (C), % 0
0.080 to 0.16
Chromium (Cr), % 0
20 to 22.5
Cobalt (Co), % 0
18.5 to 21
Copper (Cu), % 59.5 to 61
0
Iron (Fe), % 0.050 to 0.2
24.3 to 36.2
Lead (Pb), % 1.2 to 1.7
0
Manganese (Mn), % 0 to 0.050
1.0 to 2.0
Molybdenum (Mo), % 0
2.5 to 3.5
Nickel (Ni), % 0 to 0.2
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), % 0 to 0.050
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Tantalum (Ta), % 0
0.75 to 1.3
Tin (Sn), % 0 to 0.3
0
Tungsten (W), % 0
2.0 to 3.0
Zinc (Zn), % 35.8 to 38.9
0