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SAE-AISI T1 Steel vs. G-CoCr28 Cobalt

SAE-AISI T1 steel belongs to the iron alloys classification, while G-CoCr28 cobalt belongs to the cobalt alloys. They have a modest 22% of their average alloy composition in common, which, by itself, doesn't mean much. There are 21 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 T1 steel and the bottom bar is G-CoCr28 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
210
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 80
83
Tensile Strength: Ultimate (UTS), MPa 770 to 2130
560

Thermal Properties

Latent Heat of Fusion, J/g 240
320
Melting Completion (Liquidus), °C 1810
1330
Melting Onset (Solidus), °C 1750
1270
Specific Heat Capacity, J/kg-K 410
470
Thermal Conductivity, W/m-K 20
8.5
Thermal Expansion, µm/m-K 12
14

Otherwise Unclassified Properties

Base Metal Price, % relative 45
100
Density, g/cm3 9.3
8.1
Embodied Carbon, kg CO2/kg material 8.2
6.2
Embodied Energy, MJ/kg 130
84
Embodied Water, L/kg 90
440

Common Calculations

Stiffness to Weight: Axial, points 12
15
Stiffness to Weight: Bending, points 21
24
Strength to Weight: Axial, points 23 to 64
19
Strength to Weight: Bending, points 20 to 40
19
Thermal Diffusivity, mm2/s 5.2
2.2
Thermal Shock Resistance, points 23 to 64
14

Alloy Composition

Carbon (C), % 0.65 to 0.8
0.050 to 0.25
Chromium (Cr), % 3.8 to 4.5
27 to 30
Cobalt (Co), % 0
48 to 52
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 73.2 to 77.2
9.7 to 24.5
Manganese (Mn), % 0.1 to 0.4
0 to 1.5
Molybdenum (Mo), % 0
0 to 0.5
Nickel (Ni), % 0 to 0.3
0 to 4.0
Niobium (Nb), % 0
0 to 0.5
Phosphorus (P), % 0 to 0.030
0 to 0.040
Silicon (Si), % 0.2 to 0.4
0.5 to 1.5
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 17.3 to 18.8
0
Vanadium (V), % 0.9 to 1.3
0