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SAE-AISI 4140 Steel vs. N08026 Nickel

SAE-AISI 4140 steel belongs to the iron alloys classification, while N08026 nickel belongs to the nickel alloys. They have a modest 33% of their average alloy composition in common, which, by itself, doesn't mean much. There are 30 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI 4140 steel and the bottom bar is N08026 nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 11 to 26
34
Fatigue Strength, MPa 360 to 650
200
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
80
Shear Strength, MPa 410 to 660
410
Tensile Strength: Ultimate (UTS), MPa 690 to 1080
620
Tensile Strength: Yield (Proof), MPa 590 to 990
270

Thermal Properties

Latent Heat of Fusion, J/g 250
310
Maximum Temperature: Mechanical, °C 420
990
Melting Completion (Liquidus), °C 1460
1430
Melting Onset (Solidus), °C 1420
1380
Specific Heat Capacity, J/kg-K 470
460
Thermal Conductivity, W/m-K 43
12
Thermal Expansion, µm/m-K 13
15

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
1.6
Electrical Conductivity: Equal Weight (Specific), % IACS 8.4
1.7

Otherwise Unclassified Properties

Base Metal Price, % relative 2.4
41
Density, g/cm3 7.8
8.2
Embodied Carbon, kg CO2/kg material 1.5
7.2
Embodied Energy, MJ/kg 20
98
Embodied Water, L/kg 51
240

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 74 to 180
170
Resilience: Unit (Modulus of Resilience), kJ/m3 920 to 2590
180
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 25 to 38
21
Strength to Weight: Bending, points 22 to 30
20
Thermal Diffusivity, mm2/s 12
3.2
Thermal Shock Resistance, points 20 to 32
15

Alloy Composition

Carbon (C), % 0.38 to 0.43
0 to 0.030
Chromium (Cr), % 0.8 to 1.1
22 to 26
Copper (Cu), % 0
2.0 to 4.0
Iron (Fe), % 96.8 to 97.8
24.4 to 37.9
Manganese (Mn), % 0.75 to 1.0
0 to 1.0
Molybdenum (Mo), % 0.15 to 0.25
5.0 to 6.7
Nickel (Ni), % 0
33 to 37.2
Nitrogen (N), % 0
0.1 to 0.16
Phosphorus (P), % 0 to 0.035
0 to 0.030
Silicon (Si), % 0.15 to 0.35
0 to 0.5
Sulfur (S), % 0 to 0.040
0 to 0.030