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C68400 Brass vs. R30155 Cobalt

C68400 brass belongs to the copper alloys classification, while R30155 cobalt belongs to the iron alloys. There are 28 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is C68400 brass and the bottom bar is R30155 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150
220
Elastic (Young's, Tensile) Modulus, GPa 110
210
Elongation at Break, % 18
34
Poisson's Ratio 0.31
0.29
Shear Modulus, GPa 41
81
Shear Strength, MPa 330
570
Tensile Strength: Ultimate (UTS), MPa 540
850
Tensile Strength: Yield (Proof), MPa 310
390

Thermal Properties

Latent Heat of Fusion, J/g 210
300
Maximum Temperature: Mechanical, °C 130
1100
Melting Completion (Liquidus), °C 840
1470
Melting Onset (Solidus), °C 820
1420
Specific Heat Capacity, J/kg-K 400
450
Thermal Conductivity, W/m-K 66
12
Thermal Expansion, µm/m-K 20
14

Otherwise Unclassified Properties

Base Metal Price, % relative 23
80
Density, g/cm3 7.9
8.5
Embodied Carbon, kg CO2/kg material 2.7
9.7
Embodied Energy, MJ/kg 47
150
Embodied Water, L/kg 320
300

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 81
230
Resilience: Unit (Modulus of Resilience), kJ/m3 460
370
Stiffness to Weight: Axial, points 7.5
14
Stiffness to Weight: Bending, points 20
23
Strength to Weight: Axial, points 19
28
Strength to Weight: Bending, points 19
24
Thermal Diffusivity, mm2/s 21
3.2
Thermal Shock Resistance, points 18
21

Alloy Composition

Aluminum (Al), % 0 to 0.5
0
Boron (B), % 0.0010 to 0.030
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 to 64
0
Iron (Fe), % 0 to 1.0
24.3 to 36.2
Lead (Pb), % 0 to 0.090
0
Manganese (Mn), % 0.2 to 1.5
1.0 to 2.0
Molybdenum (Mo), % 0
2.5 to 3.5
Nickel (Ni), % 0 to 0.5
19 to 21
Niobium (Nb), % 0
0.75 to 1.3
Nitrogen (N), % 0
0 to 0.2
Phosphorus (P), % 0.030 to 0.3
0 to 0.040
Silicon (Si), % 1.5 to 2.5
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Tantalum (Ta), % 0
0.75 to 1.3
Tin (Sn), % 0 to 0.5
0
Tungsten (W), % 0
2.0 to 3.0
Zinc (Zn), % 28.6 to 39.3
0
Residuals, % 0 to 0.5
0