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SAE-AISI 8740 Steel vs. Nickel 80A

SAE-AISI 8740 steel belongs to the iron alloys classification, while nickel 80A belongs to the nickel alloys. There are 30 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI 8740 steel and the bottom bar is nickel 80A.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 11 to 23
22
Fatigue Strength, MPa 270 to 350
430
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
74
Shear Strength, MPa 370 to 400
660
Tensile Strength: Ultimate (UTS), MPa 580 to 670
1040
Tensile Strength: Yield (Proof), MPa 380 to 570
710

Thermal Properties

Latent Heat of Fusion, J/g 250
320
Maximum Temperature: Mechanical, °C 410
980
Melting Completion (Liquidus), °C 1460
1360
Melting Onset (Solidus), °C 1420
1310
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 39
11
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
1.5
Electrical Conductivity: Equal Weight (Specific), % IACS 8.4
1.6

Otherwise Unclassified Properties

Base Metal Price, % relative 2.6
55
Density, g/cm3 7.8
8.3
Embodied Carbon, kg CO2/kg material 1.5
9.8
Embodied Energy, MJ/kg 20
140
Embodied Water, L/kg 50
280

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 71 to 120
210
Resilience: Unit (Modulus of Resilience), kJ/m3 390 to 850
1300
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
23
Strength to Weight: Axial, points 20 to 24
35
Strength to Weight: Bending, points 20 to 22
27
Thermal Diffusivity, mm2/s 10
2.9
Thermal Shock Resistance, points 17 to 20
31

Alloy Composition

Aluminum (Al), % 0
0.5 to 1.8
Carbon (C), % 0.38 to 0.43
0 to 0.1
Chromium (Cr), % 0.4 to 0.6
18 to 21
Iron (Fe), % 96.5 to 97.7
0 to 3.0
Manganese (Mn), % 0.75 to 1.0
0 to 1.0
Molybdenum (Mo), % 0.2 to 0.3
0
Nickel (Ni), % 0.4 to 0.7
69.4 to 79.7
Phosphorus (P), % 0 to 0.035
0
Silicon (Si), % 0.15 to 0.35
0 to 1.0
Sulfur (S), % 0 to 0.040
0 to 0.015
Titanium (Ti), % 0
1.8 to 2.7