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SAE-AISI T2 Steel vs. R30001 Cobalt

SAE-AISI T2 steel belongs to the iron alloys classification, while R30001 cobalt belongs to the cobalt alloys. There are 20 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 T2 steel and the bottom bar is R30001 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
220
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 79
86
Tensile Strength: Ultimate (UTS), MPa 780 to 2150
620

Thermal Properties

Latent Heat of Fusion, J/g 250
310
Melting Completion (Liquidus), °C 1820
1530
Melting Onset (Solidus), °C 1760
1260
Specific Heat Capacity, J/kg-K 410
430
Thermal Conductivity, W/m-K 19
15
Thermal Expansion, µm/m-K 12
11

Otherwise Unclassified Properties

Density, g/cm3 9.3
9.0
Embodied Carbon, kg CO2/kg material 11
8.9
Embodied Energy, MJ/kg 170
130
Embodied Water, L/kg 98
460

Common Calculations

Stiffness to Weight: Axial, points 12
14
Stiffness to Weight: Bending, points 21
22
Strength to Weight: Axial, points 23 to 64
19
Strength to Weight: Bending, points 20 to 40
18
Thermal Diffusivity, mm2/s 4.9
3.7
Thermal Shock Resistance, points 23 to 65
19

Alloy Composition

Carbon (C), % 0.8 to 0.9
2.0 to 3.0
Chromium (Cr), % 3.8 to 4.5
28 to 32
Cobalt (Co), % 0
43 to 59
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 70.8 to 75.8
0 to 3.0
Manganese (Mn), % 0.2 to 0.4
0
Molybdenum (Mo), % 0 to 1.0
0 to 1.0
Nickel (Ni), % 0 to 0.3
0 to 3.0
Phosphorus (P), % 0 to 0.030
0
Silicon (Si), % 0.2 to 0.4
0 to 2.0
Sulfur (S), % 0 to 0.030
0
Tungsten (W), % 17.5 to 19
11 to 13
Vanadium (V), % 1.8 to 2.4
0