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Nickel 725 vs. SAE-AISI 1144 Steel

Nickel 725 belongs to the nickel alloys classification, while SAE-AISI 1144 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 1144 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 34
11 to 17
Fatigue Strength, MPa 260
280 to 430
Poisson's Ratio 0.29
0.29
Reduction in Area, % 45
34 to 40
Shear Modulus, GPa 78
72
Shear Strength, MPa 580
460 to 510
Tensile Strength: Ultimate (UTS), MPa 860
750 to 840
Tensile Strength: Yield (Proof), MPa 350
420 to 690

Thermal Properties

Latent Heat of Fusion, J/g 320
250
Maximum Temperature: Mechanical, °C 980
400
Melting Completion (Liquidus), °C 1340
1450
Melting Onset (Solidus), °C 1270
1410
Specific Heat Capacity, J/kg-K 440
470
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.5
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 1.6
8.2

Otherwise Unclassified Properties

Base Metal Price, % relative 75
1.9
Density, g/cm3 8.5
7.8
Embodied Carbon, kg CO2/kg material 13
1.4
Embodied Energy, MJ/kg 190
19
Embodied Water, L/kg 270
47

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 240
91 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 300
480 to 1290
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 28
27 to 30
Strength to Weight: Bending, points 24
23 to 25
Thermal Shock Resistance, points 23
22 to 24

Alloy Composition

Aluminum (Al), % 0 to 0.35
0
Carbon (C), % 0 to 0.030
0.4 to 0.48
Chromium (Cr), % 19 to 22.5
0
Iron (Fe), % 2.3 to 15.3
97.5 to 98
Manganese (Mn), % 0 to 0.35
1.4 to 1.7
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
0.24 to 0.33
Titanium (Ti), % 1.0 to 1.7
0