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AWS BCo-1 vs. SAE-AISI T4 Steel

AWS BCo-1 belongs to the cobalt alloys classification, while SAE-AISI T4 steel belongs to the iron alloys. There are 18 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is AWS BCo-1 and the bottom bar is SAE-AISI T4 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
210
Poisson's Ratio 0.3
0.29
Shear Modulus, GPa 78
80
Tensile Strength: Ultimate (UTS), MPa 700
800 to 2140

Thermal Properties

Latent Heat of Fusion, J/g 420
250
Melting Completion (Liquidus), °C 1150
1810
Melting Onset (Solidus), °C 1120
1750
Specific Heat Capacity, J/kg-K 480
410
Thermal Expansion, µm/m-K 12
12

Otherwise Unclassified Properties

Density, g/cm3 8.1
9.4
Embodied Carbon, kg CO2/kg material 8.0
8.5
Embodied Energy, MJ/kg 110
130
Embodied Water, L/kg 430
120

Common Calculations

Stiffness to Weight: Axial, points 14
12
Stiffness to Weight: Bending, points 24
21
Strength to Weight: Axial, points 24
24 to 64
Strength to Weight: Bending, points 22
20 to 39
Thermal Shock Resistance, points 21
24 to 64

Alloy Composition

Aluminum (Al), % 0 to 0.050
0
Boron (B), % 0.7 to 0.9
0
Carbon (C), % 0.35 to 0.45
0.7 to 0.8
Chromium (Cr), % 18 to 20
3.8 to 4.5
Cobalt (Co), % 46 to 54
4.3 to 5.8
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 0 to 1.0
66.3 to 72.3
Manganese (Mn), % 0
0.1 to 0.4
Molybdenum (Mo), % 0
0.4 to 1.0
Nickel (Ni), % 16 to 18
0 to 0.3
Phosphorus (P), % 0 to 0.020
0 to 0.030
Selenium (Se), % 0 to 0.0050
0
Silicon (Si), % 7.5 to 8.5
0.2 to 0.4
Sulfur (S), % 0 to 0.020
0 to 0.030
Titanium (Ti), % 0 to 0.050
0
Tungsten (W), % 3.5 to 4.5
17.5 to 19
Vanadium (V), % 0
0.8 to 1.2
Zirconium (Zr), % 0 to 0.050
0
Residuals, % 0 to 0.5
0