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SAE-AISI T8 Steel vs. AWS BNi-5

SAE-AISI T8 steel belongs to the iron alloys classification, while AWS BNi-5 belongs to the nickel alloys. There are 19 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI T8 steel and the bottom bar is AWS BNi-5.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 78
72
Tensile Strength: Ultimate (UTS), MPa 780 to 2140
470

Thermal Properties

Latent Heat of Fusion, J/g 250
470
Melting Completion (Liquidus), °C 1730
1140
Melting Onset (Solidus), °C 1670
1080
Specific Heat Capacity, J/kg-K 420
510
Thermal Expansion, µm/m-K 12
12

Otherwise Unclassified Properties

Base Metal Price, % relative 45
55
Density, g/cm3 9.0
7.7
Embodied Carbon, kg CO2/kg material 10
8.9
Embodied Energy, MJ/kg 160
130
Embodied Water, L/kg 120
260

Common Calculations

Stiffness to Weight: Axial, points 12
13
Stiffness to Weight: Bending, points 22
25
Strength to Weight: Axial, points 24 to 66
17
Strength to Weight: Bending, points 21 to 41
17
Thermal Shock Resistance, points 24 to 66
15

Alloy Composition


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Aluminum (Al), % 0
0 to 0.050
Boron (B), % 0
0 to 0.030
Carbon (C), % 0.75 to 0.85
0 to 0.060
Chromium (Cr), % 3.8 to 4.5
18.5 to 19.5
Cobalt (Co), % 4.3 to 5.8
0 to 0.1
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 69.3 to 75.4
0
Manganese (Mn), % 0.2 to 0.4
0
Molybdenum (Mo), % 0.4 to 1.0
0
Nickel (Ni), % 0 to 0.3
69.1 to 71.8
Phosphorus (P), % 0 to 0.030
0 to 0.020
Selenium (Se), % 0
0 to 0.0050
Silicon (Si), % 0.2 to 0.4
9.8 to 10.5
Sulfur (S), % 0 to 0.030
0 to 0.020
Titanium (Ti), % 0
0 to 0.050
Tungsten (W), % 13.3 to 14.8
0
Vanadium (V), % 1.8 to 2.4
0
Zirconium (Zr), % 0
0 to 0.050
Residuals, % 0
0 to 0.5