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Nickel 725 vs. SAE-AISI 1018 Steel

Nickel 725 belongs to the nickel alloys classification, while SAE-AISI 1018 steel belongs to the iron alloys. There are 29 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is nickel 725 and the bottom bar is SAE-AISI 1018 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 34
17 to 27
Fatigue Strength, MPa 260
180 to 270
Poisson's Ratio 0.29
0.29
Reduction in Area, % 45
45 to 57
Shear Modulus, GPa 78
73
Shear Strength, MPa 580
280 to 300
Tensile Strength: Ultimate (UTS), MPa 860
430 to 480
Tensile Strength: Yield (Proof), MPa 350
240 to 400

Thermal Properties

Latent Heat of Fusion, J/g 320
250
Maximum Temperature: Mechanical, °C 980
400
Melting Completion (Liquidus), °C 1340
1460
Melting Onset (Solidus), °C 1270
1420
Specific Heat Capacity, J/kg-K 440
470
Thermal Expansion, µm/m-K 13
12

Electrical Properties

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

Otherwise Unclassified Properties

Base Metal Price, % relative 75
1.8
Density, g/cm3 8.5
7.9
Embodied Carbon, kg CO2/kg material 13
1.4
Embodied Energy, MJ/kg 190
18
Embodied Water, L/kg 270
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 240
75 to 100
Resilience: Unit (Modulus of Resilience), kJ/m3 300
150 to 430
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 28
15 to 17
Strength to Weight: Bending, points 24
16 to 17
Thermal Shock Resistance, points 23
14 to 15

Alloy Composition

Aluminum (Al), % 0 to 0.35
0
Carbon (C), % 0 to 0.030
0.15 to 0.2
Chromium (Cr), % 19 to 22.5
0
Iron (Fe), % 2.3 to 15.3
98.8 to 99.25
Manganese (Mn), % 0 to 0.35
0.6 to 0.9
Molybdenum (Mo), % 7.0 to 9.5
0
Nickel (Ni), % 55 to 59
0
Niobium (Nb), % 2.8 to 4.0
0
Phosphorus (P), % 0 to 0.015
0 to 0.040
Silicon (Si), % 0 to 0.2
0
Sulfur (S), % 0 to 0.010
0 to 0.050
Titanium (Ti), % 1.0 to 1.7
0