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SAE-AISI M6 Steel vs. EN 2.4964 Cobalt

SAE-AISI M6 steel belongs to the iron alloys classification, while EN 2.4964 cobalt belongs to the cobalt alloys. They have a modest 23% of their average alloy composition in common, which, by itself, doesn't mean much. There are 20 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI M6 steel and the bottom bar is EN 2.4964 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
220
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 77
86
Tensile Strength: Ultimate (UTS), MPa 840 to 2210
960

Thermal Properties

Latent Heat of Fusion, J/g 260
290
Melting Completion (Liquidus), °C 1560
1630
Melting Onset (Solidus), °C 1510
1550
Specific Heat Capacity, J/kg-K 440
400
Thermal Conductivity, W/m-K 17
15
Thermal Expansion, µm/m-K 12
12

Otherwise Unclassified Properties

Density, g/cm3 8.4
9.6
Embodied Carbon, kg CO2/kg material 8.0
9.8
Embodied Energy, MJ/kg 120
140
Embodied Water, L/kg 160
450

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 23
21
Strength to Weight: Axial, points 28 to 73
28
Strength to Weight: Bending, points 24 to 45
23
Thermal Diffusivity, mm2/s 4.7
3.9
Thermal Shock Resistance, points 26 to 68
25

Alloy Composition

Carbon (C), % 0.75 to 0.85
0.050 to 0.15
Chromium (Cr), % 3.8 to 4.5
19 to 21
Cobalt (Co), % 11 to 13
46.4 to 58
Iron (Fe), % 68.8 to 74.6
0 to 3.0
Manganese (Mn), % 0.15 to 0.4
0 to 2.0
Molybdenum (Mo), % 4.5 to 5.5
0
Nickel (Ni), % 0
9.0 to 11
Phosphorus (P), % 0 to 0.030
0 to 0.020
Silicon (Si), % 0.2 to 0.45
0 to 0.4
Sulfur (S), % 0 to 0.030
0 to 0.015
Tungsten (W), % 3.8 to 4.8
14 to 16
Vanadium (V), % 1.3 to 1.7
0