MakeItFrom.com
Menu (ESC)

R30021 Cobalt vs. SAE-AISI 9310 Steel

R30021 cobalt belongs to the cobalt alloys classification, while SAE-AISI 9310 steel belongs to the iron alloys. There are 27 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is R30021 cobalt and the bottom bar is SAE-AISI 9310 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
190
Elongation at Break, % 9.0
17 to 19
Fatigue Strength, MPa 250
300 to 390
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 86
73
Tensile Strength: Ultimate (UTS), MPa 700
820 to 910
Tensile Strength: Yield (Proof), MPa 500
450 to 570

Thermal Properties

Latent Heat of Fusion, J/g 330
250
Melting Completion (Liquidus), °C 1350
1460
Melting Onset (Solidus), °C 1190
1420
Specific Heat Capacity, J/kg-K 450
470
Thermal Conductivity, W/m-K 15
48
Thermal Expansion, µm/m-K 11
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.9
7.7
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
8.9

Otherwise Unclassified Properties

Density, g/cm3 8.4
7.9
Embodied Carbon, kg CO2/kg material 8.0
1.8
Embodied Energy, MJ/kg 110
24
Embodied Water, L/kg 520
57

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 57
120 to 150
Resilience: Unit (Modulus of Resilience), kJ/m3 570
540 to 860
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 23
29 to 32
Strength to Weight: Bending, points 21
25 to 27
Thermal Diffusivity, mm2/s 3.8
13
Thermal Shock Resistance, points 21
24 to 27

Alloy Composition

Carbon (C), % 0.2 to 0.35
0.080 to 0.13
Chromium (Cr), % 26 to 29
1.0 to 1.4
Cobalt (Co), % 61.7 to 67.3
0
Iron (Fe), % 0 to 3.0
93.8 to 95.2
Manganese (Mn), % 0
0.45 to 0.65
Molybdenum (Mo), % 4.5 to 6.0
0.080 to 0.15
Nickel (Ni), % 2.0 to 3.0
3.0 to 3.5
Phosphorus (P), % 0
0 to 0.015
Silicon (Si), % 0 to 1.5
0.2 to 0.35
Sulfur (S), % 0
0 to 0.012