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C28000 Muntz Metal vs. R30605 Cobalt

C28000 Muntz Metal belongs to the copper alloys classification, while R30605 cobalt belongs to the cobalt alloys. There are 24 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 C28000 Muntz Metal and the bottom bar is R30605 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 100
210
Elongation at Break, % 10 to 45
34
Poisson's Ratio 0.31
0.29
Shear Modulus, GPa 40
81
Tensile Strength: Ultimate (UTS), MPa 330 to 610
1130 to 1900
Tensile Strength: Yield (Proof), MPa 150 to 370
470 to 1600

Thermal Properties

Latent Heat of Fusion, J/g 170
290
Melting Completion (Liquidus), °C 900
1410
Melting Onset (Solidus), °C 900
1330
Specific Heat Capacity, J/kg-K 390
410
Thermal Conductivity, W/m-K 120
9.6
Thermal Expansion, µm/m-K 21
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 28
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 31
1.8

Otherwise Unclassified Properties

Density, g/cm3 8.0
9.6
Embodied Carbon, kg CO2/kg material 2.7
9.8
Embodied Energy, MJ/kg 46
140
Embodied Water, L/kg 320
450

Common Calculations

Stiffness to Weight: Axial, points 7.2
12
Stiffness to Weight: Bending, points 20
21
Strength to Weight: Axial, points 11 to 21
33 to 55
Strength to Weight: Bending, points 13 to 20
25 to 36
Thermal Diffusivity, mm2/s 40
2.5
Thermal Shock Resistance, points 11 to 20
31 to 52

Alloy Composition

Carbon (C), % 0
0.050 to 0.15
Chromium (Cr), % 0
19 to 21
Cobalt (Co), % 0
46.4 to 57
Copper (Cu), % 59 to 63
0
Iron (Fe), % 0 to 0.070
0 to 3.0
Lead (Pb), % 0 to 0.3
0
Manganese (Mn), % 0
1.0 to 2.0
Nickel (Ni), % 0
9.0 to 11
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0
0 to 0.4
Sulfur (S), % 0
0 to 0.030
Tungsten (W), % 0
14 to 16
Zinc (Zn), % 36.3 to 41
0
Residuals, % 0 to 0.3
0