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SAE-AISI 1018 Steel vs. N06985 Nickel

SAE-AISI 1018 steel belongs to the iron alloys classification, while N06985 nickel belongs to the nickel alloys. They have a modest 20% 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 1018 steel and the bottom bar is N06985 nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
210
Elongation at Break, % 17 to 27
45
Fatigue Strength, MPa 180 to 270
220
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
80
Shear Strength, MPa 280 to 300
480
Tensile Strength: Ultimate (UTS), MPa 430 to 480
690
Tensile Strength: Yield (Proof), MPa 240 to 400
260

Thermal Properties

Latent Heat of Fusion, J/g 250
320
Maximum Temperature: Mechanical, °C 400
990
Melting Completion (Liquidus), °C 1460
1350
Melting Onset (Solidus), °C 1420
1260
Specific Heat Capacity, J/kg-K 470
450
Thermal Conductivity, W/m-K 52
10
Thermal Expansion, µm/m-K 12
15

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.0
1.5
Electrical Conductivity: Equal Weight (Specific), % IACS 8.0
1.6

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
55
Density, g/cm3 7.9
8.4
Embodied Carbon, kg CO2/kg material 1.4
8.8
Embodied Energy, MJ/kg 18
120
Embodied Water, L/kg 46
270

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 75 to 100
250
Resilience: Unit (Modulus of Resilience), kJ/m3 150 to 430
160
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
23
Strength to Weight: Axial, points 15 to 17
23
Strength to Weight: Bending, points 16 to 17
21
Thermal Diffusivity, mm2/s 14
2.6
Thermal Shock Resistance, points 14 to 15
16

Alloy Composition

Carbon (C), % 0.15 to 0.2
0 to 0.015
Chromium (Cr), % 0
21 to 23.5
Cobalt (Co), % 0
0 to 5.0
Copper (Cu), % 0
1.5 to 2.5
Iron (Fe), % 98.8 to 99.25
18 to 21
Manganese (Mn), % 0.6 to 0.9
0 to 1.0
Molybdenum (Mo), % 0
6.0 to 8.0
Nickel (Ni), % 0
35.9 to 53.5
Niobium (Nb), % 0
0 to 0.5
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0
0 to 1.0
Sulfur (S), % 0 to 0.050
0 to 0.030
Tungsten (W), % 0
0 to 1.5