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EN 2.4964 Cobalt vs. SAE-AISI M4 Steel

EN 2.4964 cobalt belongs to the cobalt alloys classification, while SAE-AISI M4 steel belongs to the iron alloys. 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 EN 2.4964 cobalt and the bottom bar is SAE-AISI M4 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
200
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 86
76
Tensile Strength: Ultimate (UTS), MPa 960
770 to 2150

Thermal Properties

Latent Heat of Fusion, J/g 290
260
Melting Completion (Liquidus), °C 1630
1610
Melting Onset (Solidus), °C 1550
1560
Specific Heat Capacity, J/kg-K 400
440
Thermal Conductivity, W/m-K 15
25
Thermal Expansion, µm/m-K 12
12

Otherwise Unclassified Properties

Density, g/cm3 9.6
8.3
Embodied Carbon, kg CO2/kg material 9.8
14
Embodied Energy, MJ/kg 140
210
Embodied Water, L/kg 450
110

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 21
23
Strength to Weight: Axial, points 28
26 to 72
Strength to Weight: Bending, points 23
23 to 45
Thermal Diffusivity, mm2/s 3.9
6.9
Thermal Shock Resistance, points 25
24 to 68

Alloy Composition

Carbon (C), % 0.050 to 0.15
1.3 to 1.4
Chromium (Cr), % 19 to 21
3.8 to 4.8
Cobalt (Co), % 46.4 to 58
0
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 0 to 3.0
75.9 to 81.4
Manganese (Mn), % 0 to 2.0
0.15 to 0.4
Molybdenum (Mo), % 0
4.3 to 5.5
Nickel (Ni), % 9.0 to 11
0 to 0.3
Phosphorus (P), % 0 to 0.020
0 to 0.030
Silicon (Si), % 0 to 0.4
0.2 to 0.45
Sulfur (S), % 0 to 0.015
0 to 0.030
Tungsten (W), % 14 to 16
5.3 to 6.5
Vanadium (V), % 0
3.8 to 4.5