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C28000 Muntz Metal vs. R30035 Cobalt

C28000 Muntz Metal belongs to the copper alloys classification, while R30035 cobalt belongs to the cobalt 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 C28000 Muntz Metal and the bottom bar is R30035 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 100
220 to 230
Elongation at Break, % 10 to 45
9.0 to 46
Poisson's Ratio 0.31
0.29
Shear Modulus, GPa 40
84 to 89
Tensile Strength: Ultimate (UTS), MPa 330 to 610
900 to 1900
Tensile Strength: Yield (Proof), MPa 150 to 370
300 to 1650

Thermal Properties

Latent Heat of Fusion, J/g 170
320
Melting Completion (Liquidus), °C 900
1440
Melting Onset (Solidus), °C 900
1320
Specific Heat Capacity, J/kg-K 390
440
Thermal Conductivity, W/m-K 120
11
Thermal Expansion, µm/m-K 21
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 28
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 31
1.8

Otherwise Unclassified Properties

Base Metal Price, % relative 23
100
Density, g/cm3 8.0
8.7
Embodied Carbon, kg CO2/kg material 2.7
10
Embodied Energy, MJ/kg 46
140
Embodied Water, L/kg 320
410

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 27 to 240
160 to 320
Resilience: Unit (Modulus of Resilience), kJ/m3 110 to 670
210 to 5920
Stiffness to Weight: Axial, points 7.2
14 to 15
Stiffness to Weight: Bending, points 20
23 to 24
Strength to Weight: Axial, points 11 to 21
29 to 61
Strength to Weight: Bending, points 13 to 20
24 to 39
Thermal Diffusivity, mm2/s 40
3.0
Thermal Shock Resistance, points 11 to 20
23 to 46

Alloy Composition

Boron (B), % 0
0 to 0.015
Carbon (C), % 0
0 to 0.025
Chromium (Cr), % 0
19 to 21
Cobalt (Co), % 0
29.1 to 39
Copper (Cu), % 59 to 63
0
Iron (Fe), % 0 to 0.070
0 to 1.0
Lead (Pb), % 0 to 0.3
0
Manganese (Mn), % 0
0 to 0.15
Molybdenum (Mo), % 0
9.0 to 10.5
Nickel (Ni), % 0
33 to 37
Phosphorus (P), % 0
0 to 0.015
Silicon (Si), % 0
0 to 0.15
Sulfur (S), % 0
0 to 0.010
Titanium (Ti), % 0
0 to 1.0
Zinc (Zn), % 36.3 to 41
0
Residuals, % 0 to 0.3
0