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Nickel 725 vs. SAE-AISI S7 Steel

Nickel 725 belongs to the nickel alloys classification, while SAE-AISI S7 steel belongs to the iron alloys. There are 21 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.

For each property being compared, the top bar is nickel 725 and the bottom bar is SAE-AISI S7 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 78
74
Tensile Strength: Ultimate (UTS), MPa 860
670 to 2030

Thermal Properties

Latent Heat of Fusion, J/g 320
260
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
7.8
Electrical Conductivity: Equal Weight (Specific), % IACS 1.6
9.0

Otherwise Unclassified Properties

Base Metal Price, % relative 75
5.0
Density, g/cm3 8.5
7.8
Embodied Carbon, kg CO2/kg material 13
2.3
Embodied Energy, MJ/kg 190
31
Embodied Water, L/kg 270
65

Common Calculations

Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 28
24 to 72
Strength to Weight: Bending, points 24
22 to 46
Thermal Shock Resistance, points 23
22 to 66

Alloy Composition

Aluminum (Al), % 0 to 0.35
0
Carbon (C), % 0 to 0.030
0.45 to 0.55
Chromium (Cr), % 19 to 22.5
3.0 to 3.5
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 2.3 to 15.3
91.6 to 94.9
Manganese (Mn), % 0 to 0.35
0.2 to 0.9
Molybdenum (Mo), % 7.0 to 9.5
1.3 to 1.8
Nickel (Ni), % 55 to 59
0
Niobium (Nb), % 2.8 to 4.0
0
Phosphorus (P), % 0 to 0.015
0 to 0.030
Silicon (Si), % 0 to 0.2
0.2 to 1.0
Sulfur (S), % 0 to 0.010
0 to 0.030
Titanium (Ti), % 1.0 to 1.7
0
Vanadium (V), % 0
0 to 0.3