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R30155 Cobalt vs. SAE-AISI 9310 Steel

Both R30155 cobalt and SAE-AISI 9310 steel are iron alloys. They have a modest 36% of their average alloy composition in common, which, by itself, doesn't mean much. There are 29 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is R30155 cobalt and the bottom bar is SAE-AISI 9310 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 220
540 to 610
Elastic (Young's, Tensile) Modulus, GPa 210
190
Elongation at Break, % 34
17 to 19
Fatigue Strength, MPa 310
300 to 390
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 81
73
Shear Strength, MPa 570
510 to 570
Tensile Strength: Ultimate (UTS), MPa 850
820 to 910
Tensile Strength: Yield (Proof), MPa 390
450 to 570

Thermal Properties

Latent Heat of Fusion, J/g 300
250
Maximum Temperature: Mechanical, °C 1100
440
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
48
Thermal Expansion, µm/m-K 14
13

Otherwise Unclassified Properties

Base Metal Price, % relative 80
4.4
Density, g/cm3 8.5
7.9
Embodied Carbon, kg CO2/kg material 9.7
1.8
Embodied Energy, MJ/kg 150
24
Embodied Water, L/kg 300
57

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 230
120 to 150
Resilience: Unit (Modulus of Resilience), kJ/m3 370
540 to 860
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 28
29 to 32
Strength to Weight: Bending, points 24
25 to 27
Thermal Diffusivity, mm2/s 3.2
13
Thermal Shock Resistance, points 21
24 to 27

Alloy Composition

Carbon (C), % 0.080 to 0.16
0.080 to 0.13
Chromium (Cr), % 20 to 22.5
1.0 to 1.4
Cobalt (Co), % 18.5 to 21
0
Iron (Fe), % 24.3 to 36.2
93.8 to 95.2
Manganese (Mn), % 1.0 to 2.0
0.45 to 0.65
Molybdenum (Mo), % 2.5 to 3.5
0.080 to 0.15
Nickel (Ni), % 19 to 21
3.0 to 3.5
Niobium (Nb), % 0.75 to 1.3
0
Nitrogen (N), % 0 to 0.2
0
Phosphorus (P), % 0 to 0.040
0 to 0.015
Silicon (Si), % 0 to 1.0
0.2 to 0.35
Sulfur (S), % 0 to 0.030
0 to 0.012
Tantalum (Ta), % 0.75 to 1.3
0
Tungsten (W), % 2.0 to 3.0
0