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R30816 Cobalt vs. SAE-AISI 9260 Steel

R30816 cobalt belongs to the cobalt alloys classification, while SAE-AISI 9260 steel belongs to the iron alloys. There are 26 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 R30816 cobalt and the bottom bar is SAE-AISI 9260 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 280
200
Elastic (Young's, Tensile) Modulus, GPa 210
190
Elongation at Break, % 23
21
Fatigue Strength, MPa 250
260
Poisson's Ratio 0.3
0.29
Shear Modulus, GPa 81
72
Tensile Strength: Ultimate (UTS), MPa 1020
660
Tensile Strength: Yield (Proof), MPa 460
380

Thermal Properties

Latent Heat of Fusion, J/g 300
280
Melting Completion (Liquidus), °C 1540
1430
Melting Onset (Solidus), °C 1460
1390
Specific Heat Capacity, J/kg-K 420
480
Thermal Conductivity, W/m-K 13
45
Thermal Expansion, µm/m-K 12
13

Otherwise Unclassified Properties

Density, g/cm3 9.1
7.7
Embodied Carbon, kg CO2/kg material 20
1.5
Embodied Energy, MJ/kg 320
20
Embodied Water, L/kg 440
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 190
120
Resilience: Unit (Modulus of Resilience), kJ/m3 510
380
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 22
25
Strength to Weight: Axial, points 31
24
Strength to Weight: Bending, points 25
22
Thermal Diffusivity, mm2/s 3.3
12
Thermal Shock Resistance, points 28
20

Alloy Composition

Carbon (C), % 0.32 to 0.42
0.56 to 0.64
Chromium (Cr), % 19 to 21
0
Cobalt (Co), % 40 to 49.8
0
Iron (Fe), % 0 to 5.0
96.1 to 96.9
Manganese (Mn), % 1.0 to 2.0
0.75 to 1.0
Molybdenum (Mo), % 3.5 to 4.5
0
Nickel (Ni), % 19 to 21
0
Niobium (Nb), % 3.5 to 4.5
0
Phosphorus (P), % 0 to 0.040
0 to 0.035
Silicon (Si), % 0 to 1.0
1.8 to 2.2
Sulfur (S), % 0 to 0.030
0 to 0.040
Tantalum (Ta), % 3.5 to 4.5
0
Tungsten (W), % 3.5 to 4.5
0