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Nickel 725 vs. SAE-AISI 1040 Steel

Nickel 725 belongs to the nickel alloys classification, while SAE-AISI 1040 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 1040 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 34
13 to 20
Fatigue Strength, MPa 260
220 to 340
Poisson's Ratio 0.29
0.29
Reduction in Area, % 45
40 to 45
Shear Modulus, GPa 78
73
Shear Strength, MPa 580
350 to 390
Tensile Strength: Ultimate (UTS), MPa 860
570 to 640
Tensile Strength: Yield (Proof), MPa 350
320 to 530

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
7.8
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
79 to 96
Resilience: Unit (Modulus of Resilience), kJ/m3 300
270 to 760
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 28
20 to 23
Strength to Weight: Bending, points 24
19 to 21
Thermal Shock Resistance, points 23
18 to 20

Alloy Composition

Aluminum (Al), % 0 to 0.35
0
Carbon (C), % 0 to 0.030
0.37 to 0.44
Chromium (Cr), % 19 to 22.5
0
Iron (Fe), % 2.3 to 15.3
98.6 to 99.03
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