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R30155 Cobalt vs. SAE-AISI T5 Steel

Both R30155 cobalt and SAE-AISI T5 steel are iron alloys. They have 47% of their average alloy composition in common. There are 22 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 R30155 cobalt and the bottom bar is SAE-AISI T5 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
210
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 81
80
Tensile Strength: Ultimate (UTS), MPa 850
860 to 2140

Thermal Properties

Latent Heat of Fusion, J/g 300
250
Melting Completion (Liquidus), °C 1470
1810
Melting Onset (Solidus), °C 1420
1750
Specific Heat Capacity, J/kg-K 450
410
Thermal Conductivity, W/m-K 12
21
Thermal Expansion, µm/m-K 14
11

Otherwise Unclassified Properties

Base Metal Price, % relative 80
60
Density, g/cm3 8.5
9.4
Embodied Carbon, kg CO2/kg material 9.7
11
Embodied Energy, MJ/kg 150
170
Embodied Water, L/kg 300
140

Common Calculations

PREN (Pitting Resistance) 37
37
Stiffness to Weight: Axial, points 14
12
Stiffness to Weight: Bending, points 23
21
Strength to Weight: Axial, points 28
25 to 63
Strength to Weight: Bending, points 24
21 to 39
Thermal Diffusivity, mm2/s 3.2
5.5
Thermal Shock Resistance, points 21
26 to 66

Alloy Composition

Carbon (C), % 0.080 to 0.16
0.75 to 0.85
Chromium (Cr), % 20 to 22.5
3.8 to 5.0
Cobalt (Co), % 18.5 to 21
7.0 to 9.5
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 24.3 to 36.2
60.6 to 68.3
Manganese (Mn), % 1.0 to 2.0
0.2 to 0.4
Molybdenum (Mo), % 2.5 to 3.5
0.5 to 1.3
Nickel (Ni), % 19 to 21
0 to 0.3
Niobium (Nb), % 0.75 to 1.3
0
Nitrogen (N), % 0 to 0.2
0
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 0 to 1.0
0.2 to 0.4
Sulfur (S), % 0 to 0.030
0 to 0.030
Tantalum (Ta), % 0.75 to 1.3
0
Tungsten (W), % 2.0 to 3.0
17.5 to 19
Vanadium (V), % 0
1.8 to 2.4