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SAE-AISI 8740 Steel vs. AWS ENi-1

SAE-AISI 8740 steel belongs to the iron alloys classification, while AWS ENi-1 belongs to the nickel alloys. There are 24 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 8740 steel and the bottom bar is AWS ENi-1.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
180
Elongation at Break, % 11 to 23
22
Poisson's Ratio 0.29
0.31
Shear Modulus, GPa 73
69
Tensile Strength: Ultimate (UTS), MPa 580 to 670
470

Thermal Properties

Latent Heat of Fusion, J/g 250
310
Melting Completion (Liquidus), °C 1460
1360
Melting Onset (Solidus), °C 1420
1310
Specific Heat Capacity, J/kg-K 470
450
Thermal Conductivity, W/m-K 39
73
Thermal Expansion, µm/m-K 13
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
19
Electrical Conductivity: Equal Weight (Specific), % IACS 8.4
19

Otherwise Unclassified Properties

Base Metal Price, % relative 2.6
60
Density, g/cm3 7.8
8.7
Embodied Carbon, kg CO2/kg material 1.5
11
Embodied Energy, MJ/kg 20
150
Embodied Water, L/kg 50
230

Common Calculations

Stiffness to Weight: Axial, points 13
12
Stiffness to Weight: Bending, points 24
22
Strength to Weight: Axial, points 20 to 24
15
Strength to Weight: Bending, points 20 to 22
15
Thermal Diffusivity, mm2/s 10
19
Thermal Shock Resistance, points 17 to 20
17

Alloy Composition

Aluminum (Al), % 0
0 to 1.0
Carbon (C), % 0.38 to 0.43
0 to 0.1
Chromium (Cr), % 0.4 to 0.6
0
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 96.5 to 97.7
0 to 0.75
Manganese (Mn), % 0.75 to 1.0
0 to 0.75
Molybdenum (Mo), % 0.2 to 0.3
0
Nickel (Ni), % 0.4 to 0.7
92 to 99
Phosphorus (P), % 0 to 0.035
0 to 0.030
Silicon (Si), % 0.15 to 0.35
0 to 1.3
Sulfur (S), % 0 to 0.040
0 to 0.020
Titanium (Ti), % 0
1.0 to 4.0
Residuals, % 0
0 to 0.5