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R30155 Cobalt vs. SAE-AISI 1090 Steel

Both R30155 cobalt and SAE-AISI 1090 steel are iron alloys. They have a modest 31% of their average alloy composition in common, which, by itself, doesn't mean much. There are 30 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is R30155 cobalt and the bottom bar is SAE-AISI 1090 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 220
220 to 280
Elastic (Young's, Tensile) Modulus, GPa 210
190
Elongation at Break, % 34
11
Fatigue Strength, MPa 310
320 to 380
Poisson's Ratio 0.29
0.29
Reduction in Area, % 34
28 to 45
Shear Modulus, GPa 81
72
Shear Strength, MPa 570
470 to 570
Tensile Strength: Ultimate (UTS), MPa 850
790 to 950
Tensile Strength: Yield (Proof), MPa 390
520 to 610

Thermal Properties

Latent Heat of Fusion, J/g 300
240
Maximum Temperature: Mechanical, °C 1100
400
Melting Completion (Liquidus), °C 1470
1450
Melting Onset (Solidus), °C 1420
1410
Specific Heat Capacity, J/kg-K 450
470
Thermal Conductivity, W/m-K 12
50
Thermal Expansion, µm/m-K 14
12

Otherwise Unclassified Properties

Base Metal Price, % relative 80
1.8
Density, g/cm3 8.5
7.8
Embodied Carbon, kg CO2/kg material 9.7
1.4
Embodied Energy, MJ/kg 150
19
Embodied Water, L/kg 300
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 230
82 to 91
Resilience: Unit (Modulus of Resilience), kJ/m3 370
730 to 1000
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 28
28 to 34
Strength to Weight: Bending, points 24
24 to 27
Thermal Diffusivity, mm2/s 3.2
13
Thermal Shock Resistance, points 21
25 to 31

Alloy Composition

Carbon (C), % 0.080 to 0.16
0.85 to 1.0
Chromium (Cr), % 20 to 22.5
0
Cobalt (Co), % 18.5 to 21
0
Iron (Fe), % 24.3 to 36.2
98 to 98.6
Manganese (Mn), % 1.0 to 2.0
0.6 to 0.9
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 to 0.040
Silicon (Si), % 0 to 1.0
0
Sulfur (S), % 0 to 0.030
0 to 0.050
Tantalum (Ta), % 0.75 to 1.3
0
Tungsten (W), % 2.0 to 3.0
0