MakeItFrom.com
Menu (ESC)

R30155 Cobalt vs. 4145 Aluminum

R30155 cobalt belongs to the iron alloys classification, while 4145 aluminum belongs to the aluminum alloys. There are 28 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.

For each property being compared, the top bar is R30155 cobalt and the bottom bar is 4145 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
73
Elongation at Break, % 34
2.2
Fatigue Strength, MPa 310
48
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 81
28
Shear Strength, MPa 570
69
Tensile Strength: Ultimate (UTS), MPa 850
120
Tensile Strength: Yield (Proof), MPa 390
68

Thermal Properties

Latent Heat of Fusion, J/g 300
540
Maximum Temperature: Mechanical, °C 1100
160
Melting Completion (Liquidus), °C 1470
590
Melting Onset (Solidus), °C 1420
520
Specific Heat Capacity, J/kg-K 450
880
Thermal Conductivity, W/m-K 12
100
Thermal Expansion, µm/m-K 14
21

Otherwise Unclassified Properties

Base Metal Price, % relative 80
10
Density, g/cm3 8.5
2.8
Embodied Carbon, kg CO2/kg material 9.7
7.6
Embodied Energy, MJ/kg 150
140
Embodied Water, L/kg 300
1040

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 230
2.3
Resilience: Unit (Modulus of Resilience), kJ/m3 370
31
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 23
50
Strength to Weight: Axial, points 28
12
Strength to Weight: Bending, points 24
19
Thermal Diffusivity, mm2/s 3.2
42
Thermal Shock Resistance, points 21
5.5

Alloy Composition

Aluminum (Al), % 0
83 to 87.4
Carbon (C), % 0.080 to 0.16
0
Chromium (Cr), % 20 to 22.5
0 to 0.15
Cobalt (Co), % 18.5 to 21
0
Copper (Cu), % 0
3.3 to 4.7
Iron (Fe), % 24.3 to 36.2
0 to 0.8
Magnesium (Mg), % 0
0 to 0.15
Manganese (Mn), % 1.0 to 2.0
0 to 0.15
Molybdenum (Mo), % 2.5 to 3.5
0
Nickel (Ni), % 19 to 21
0
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
9.3 to 10.7
Sulfur (S), % 0 to 0.030
0
Tantalum (Ta), % 0.75 to 1.3
0
Tungsten (W), % 2.0 to 3.0
0
Zinc (Zn), % 0
0 to 0.2
Residuals, % 0
0 to 0.15