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SAE-AISI S6 Steel vs. R30035 Cobalt

SAE-AISI S6 steel belongs to the iron alloys classification, while R30035 cobalt belongs to the cobalt alloys. There are 23 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 SAE-AISI S6 steel and the bottom bar is R30035 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
220 to 230
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 72
84 to 89
Tensile Strength: Ultimate (UTS), MPa 670 to 1920
900 to 1900

Thermal Properties

Latent Heat of Fusion, J/g 290
320
Melting Completion (Liquidus), °C 1430
1440
Melting Onset (Solidus), °C 1390
1320
Specific Heat Capacity, J/kg-K 480
440
Thermal Conductivity, W/m-K 41
11
Thermal Expansion, µm/m-K 12
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.6
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 8.9
1.8

Otherwise Unclassified Properties

Base Metal Price, % relative 3.2
100
Density, g/cm3 7.7
8.7
Embodied Carbon, kg CO2/kg material 2.3
10
Embodied Energy, MJ/kg 33
140
Embodied Water, L/kg 56
410

Common Calculations

Stiffness to Weight: Axial, points 13
14 to 15
Stiffness to Weight: Bending, points 25
23 to 24
Strength to Weight: Axial, points 24 to 70
29 to 61
Strength to Weight: Bending, points 22 to 45
24 to 39
Thermal Diffusivity, mm2/s 11
3.0
Thermal Shock Resistance, points 22 to 64
23 to 46

Alloy Composition

Boron (B), % 0
0 to 0.015
Carbon (C), % 0.4 to 0.5
0 to 0.025
Chromium (Cr), % 1.2 to 1.5
19 to 21
Cobalt (Co), % 0
29.1 to 39
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 92.8 to 94.7
0 to 1.0
Manganese (Mn), % 1.2 to 1.5
0 to 0.15
Molybdenum (Mo), % 0.3 to 0.5
9.0 to 10.5
Nickel (Ni), % 0
33 to 37
Phosphorus (P), % 0 to 0.030
0 to 0.015
Silicon (Si), % 2.0 to 2.5
0 to 0.15
Sulfur (S), % 0 to 0.030
0 to 0.010
Titanium (Ti), % 0
0 to 1.0
Vanadium (V), % 0.2 to 0.4
0

Comparable Variants