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R30155 Cobalt vs. SAE-AISI 1026 Steel

Both R30155 cobalt and SAE-AISI 1026 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 1026 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 220
140 to 160
Elastic (Young's, Tensile) Modulus, GPa 210
190
Elongation at Break, % 34
17 to 27
Fatigue Strength, MPa 310
200 to 310
Poisson's Ratio 0.29
0.29
Reduction in Area, % 34
45 to 55
Shear Modulus, GPa 81
73
Shear Strength, MPa 570
320 to 340
Tensile Strength: Ultimate (UTS), MPa 850
500 to 550
Tensile Strength: Yield (Proof), MPa 390
270 to 470

Thermal Properties

Latent Heat of Fusion, J/g 300
250
Maximum Temperature: Mechanical, °C 1100
400
Melting Completion (Liquidus), °C 1470
1460
Melting Onset (Solidus), °C 1420
1420
Specific Heat Capacity, J/kg-K 450
470
Thermal Conductivity, W/m-K 12
52
Thermal Expansion, µm/m-K 14
12

Otherwise Unclassified Properties

Base Metal Price, % relative 80
1.8
Density, g/cm3 8.5
7.9
Embodied Carbon, kg CO2/kg material 9.7
1.4
Embodied Energy, MJ/kg 150
18
Embodied Water, L/kg 300
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 230
89 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 370
200 to 580
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 28
18 to 20
Strength to Weight: Bending, points 24
18 to 19
Thermal Diffusivity, mm2/s 3.2
14
Thermal Shock Resistance, points 21
16 to 18

Alloy Composition

Carbon (C), % 0.080 to 0.16
0.22 to 0.28
Chromium (Cr), % 20 to 22.5
0
Cobalt (Co), % 18.5 to 21
0
Iron (Fe), % 24.3 to 36.2
98.7 to 99.18
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