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R30155 Cobalt vs. Zamak 2

R30155 cobalt belongs to the iron alloys classification, while Zamak 2 belongs to the zinc alloys. There are 29 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is R30155 cobalt and the bottom bar is Zamak 2.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 220
100
Elastic (Young's, Tensile) Modulus, GPa 210
87
Elongation at Break, % 34
6.0
Fatigue Strength, MPa 310
59
Poisson's Ratio 0.29
0.26
Shear Modulus, GPa 81
33
Shear Strength, MPa 570
320
Tensile Strength: Ultimate (UTS), MPa 850
360
Tensile Strength: Yield (Proof), MPa 390
270

Thermal Properties

Latent Heat of Fusion, J/g 300
130
Maximum Temperature: Mechanical, °C 1100
95
Melting Completion (Liquidus), °C 1470
390
Melting Onset (Solidus), °C 1420
380
Specific Heat Capacity, J/kg-K 450
410
Thermal Conductivity, W/m-K 12
110
Thermal Expansion, µm/m-K 14
28

Otherwise Unclassified Properties

Base Metal Price, % relative 80
12
Density, g/cm3 8.5
6.5
Embodied Carbon, kg CO2/kg material 9.7
3.0
Embodied Energy, MJ/kg 150
57
Embodied Water, L/kg 300
380

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 230
20
Resilience: Unit (Modulus of Resilience), kJ/m3 370
420
Stiffness to Weight: Axial, points 14
7.5
Stiffness to Weight: Bending, points 23
23
Strength to Weight: Axial, points 28
15
Strength to Weight: Bending, points 24
17
Thermal Diffusivity, mm2/s 3.2
41
Thermal Shock Resistance, points 21
11

Alloy Composition

Aluminum (Al), % 0
3.5 to 4.3
Cadmium (Cd), % 0
0 to 0.0050
Carbon (C), % 0.080 to 0.16
0
Chromium (Cr), % 20 to 22.5
0
Cobalt (Co), % 18.5 to 21
0
Copper (Cu), % 0
2.5 to 3.3
Iron (Fe), % 24.3 to 36.2
0 to 0.1
Lead (Pb), % 0
0 to 0.0050
Magnesium (Mg), % 0
0.020 to 0.060
Manganese (Mn), % 1.0 to 2.0
0
Molybdenum (Mo), % 2.5 to 3.5
0
Nickel (Ni), % 19 to 21
0 to 0.020
Niobium (Nb), % 0.75 to 1.3
0
Nitrogen (N), % 0 to 0.2
0
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.0
0 to 0.030
Sulfur (S), % 0 to 0.030
0
Tantalum (Ta), % 0.75 to 1.3
0
Tin (Sn), % 0
0 to 0.0030
Tungsten (W), % 2.0 to 3.0
0
Zinc (Zn), % 0
92.2 to 94