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SAE-AISI 8740 Steel vs. N10665 Nickel

SAE-AISI 8740 steel belongs to the iron alloys classification, while N10665 nickel belongs to the nickel alloys. 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 8740 steel and the bottom bar is N10665 nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
220
Elongation at Break, % 11 to 23
45
Fatigue Strength, MPa 270 to 350
340
Poisson's Ratio 0.29
0.31
Shear Modulus, GPa 73
84
Shear Strength, MPa 370 to 400
600
Tensile Strength: Ultimate (UTS), MPa 580 to 670
860
Tensile Strength: Yield (Proof), MPa 380 to 570
400

Thermal Properties

Latent Heat of Fusion, J/g 250
310
Maximum Temperature: Mechanical, °C 410
900
Melting Completion (Liquidus), °C 1460
1620
Melting Onset (Solidus), °C 1420
1570
Specific Heat Capacity, J/kg-K 470
390
Thermal Conductivity, W/m-K 39
11
Thermal Expansion, µm/m-K 13
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
1.3
Electrical Conductivity: Equal Weight (Specific), % IACS 8.4
1.2

Otherwise Unclassified Properties

Base Metal Price, % relative 2.6
75
Density, g/cm3 7.8
9.3
Embodied Carbon, kg CO2/kg material 1.5
15
Embodied Energy, MJ/kg 20
200
Embodied Water, L/kg 50
270

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 71 to 120
320
Resilience: Unit (Modulus of Resilience), kJ/m3 390 to 850
360
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
22
Strength to Weight: Axial, points 20 to 24
26
Strength to Weight: Bending, points 20 to 22
22
Thermal Diffusivity, mm2/s 10
3.1
Thermal Shock Resistance, points 17 to 20
27

Alloy Composition

Carbon (C), % 0.38 to 0.43
0 to 0.020
Chromium (Cr), % 0.4 to 0.6
0 to 1.0
Cobalt (Co), % 0
0 to 1.0
Iron (Fe), % 96.5 to 97.7
0 to 2.0
Manganese (Mn), % 0.75 to 1.0
0 to 1.0
Molybdenum (Mo), % 0.2 to 0.3
26 to 30
Nickel (Ni), % 0.4 to 0.7
64.8 to 74
Phosphorus (P), % 0 to 0.035
0 to 0.040
Silicon (Si), % 0.15 to 0.35
0 to 0.1
Sulfur (S), % 0 to 0.040
0 to 0.030