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R30003 Cobalt vs. SAE-AISI S4 Steel

R30003 cobalt belongs to the cobalt alloys classification, while SAE-AISI S4 steel belongs to the iron alloys. There are 23 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 R30003 cobalt and the bottom bar is SAE-AISI S4 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
190
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 83
72
Tensile Strength: Ultimate (UTS), MPa 970 to 1720
670 to 2140

Thermal Properties

Latent Heat of Fusion, J/g 310
280
Melting Completion (Liquidus), °C 1400
1430
Melting Onset (Solidus), °C 1440
1390
Specific Heat Capacity, J/kg-K 450
480
Thermal Conductivity, W/m-K 13
44
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
8.7

Otherwise Unclassified Properties

Base Metal Price, % relative 95
2.2
Density, g/cm3 8.4
7.7
Embodied Carbon, kg CO2/kg material 8.0
2.0
Embodied Energy, MJ/kg 110
29
Embodied Water, L/kg 400
48

Common Calculations

Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 32 to 57
24 to 77
Strength to Weight: Bending, points 26 to 38
22 to 48
Thermal Diffusivity, mm2/s 3.3
12
Thermal Shock Resistance, points 26 to 45
20 to 65

Alloy Composition

Boron (B), % 0 to 0.1
0
Carbon (C), % 0 to 0.15
0.5 to 0.65
Chromium (Cr), % 19 to 21
0.1 to 0.5
Cobalt (Co), % 39 to 41
0
Iron (Fe), % 10 to 20.5
95.2 to 96.9
Manganese (Mn), % 1.5 to 2.5
0.6 to 1.0
Molybdenum (Mo), % 6.0 to 8.0
0
Nickel (Ni), % 14 to 16
0
Phosphorus (P), % 0 to 0.015
0 to 0.030
Silicon (Si), % 0 to 1.2
1.8 to 2.3
Sulfur (S), % 0 to 0.015
0 to 0.030
Vanadium (V), % 0
0.15 to 0.35

Comparable Variants