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SAE-AISI M44 Steel vs. R30075 Cobalt

SAE-AISI M44 steel belongs to the iron alloys classification, while R30075 cobalt belongs to the cobalt alloys. They have a modest 24% 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 (10, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI M44 steel and the bottom bar is R30075 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
210 to 250
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 78
82 to 98
Tensile Strength: Ultimate (UTS), MPa 870 to 2290
780 to 1280

Thermal Properties

Latent Heat of Fusion, J/g 270
320
Melting Completion (Liquidus), °C 1590
1360
Melting Onset (Solidus), °C 1540
1290
Specific Heat Capacity, J/kg-K 440
450
Thermal Conductivity, W/m-K 14
13
Thermal Expansion, µm/m-K 12
12

Otherwise Unclassified Properties

Density, g/cm3 8.4
8.4
Embodied Carbon, kg CO2/kg material 9.9
8.1
Embodied Energy, MJ/kg 150
110
Embodied Water, L/kg 170
530

Common Calculations

Stiffness to Weight: Axial, points 13
14 to 17
Stiffness to Weight: Bending, points 23
24 to 25
Strength to Weight: Axial, points 28 to 75
26 to 42
Strength to Weight: Bending, points 24 to 46
22 to 31
Thermal Diffusivity, mm2/s 3.7
3.5
Thermal Shock Resistance, points 27 to 70
21 to 29

Alloy Composition

Aluminum (Al), % 0
0 to 0.1
Boron (B), % 0
0 to 0.010
Carbon (C), % 1.1 to 1.2
0 to 0.35
Chromium (Cr), % 4.0 to 4.8
27 to 30
Cobalt (Co), % 11 to 12.3
58.7 to 68
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 65.3 to 70.6
0 to 0.75
Manganese (Mn), % 0.2 to 0.4
0 to 1.0
Molybdenum (Mo), % 6.0 to 7.0
5.0 to 7.0
Nickel (Ni), % 0 to 0.3
0 to 0.5
Nitrogen (N), % 0
0 to 0.25
Phosphorus (P), % 0 to 0.030
0 to 0.020
Silicon (Si), % 0.3 to 0.55
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.010
Titanium (Ti), % 0
0 to 0.1
Tungsten (W), % 5.0 to 5.8
0 to 0.2
Vanadium (V), % 1.9 to 2.2
0

Comparable Variants