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SAE-AISI T4 Steel vs. AWS BCo-1

SAE-AISI T4 steel belongs to the iron alloys classification, while AWS BCo-1 belongs to the cobalt 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 SAE-AISI T4 steel and the bottom bar is AWS BCo-1.

Metric UnitsUS Customary Units

Mechanical Properties

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

Thermal Properties

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

Otherwise Unclassified Properties

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

Common Calculations

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

Alloy Composition

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