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Nickel 725 vs. SAE-AISI A6 Steel

Nickel 725 belongs to the nickel alloys classification, while SAE-AISI A6 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 A6 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
73
Tensile Strength: Ultimate (UTS), MPa 860
750 to 1990

Thermal Properties

Latent Heat of Fusion, J/g 320
250
Melting Completion (Liquidus), °C 1340
1460
Melting Onset (Solidus), °C 1270
1410
Specific Heat Capacity, J/kg-K 440
470
Thermal Expansion, µm/m-K 13
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.5
7.5
Electrical Conductivity: Equal Weight (Specific), % IACS 1.6
8.7

Otherwise Unclassified Properties

Base Metal Price, % relative 75
3.7
Density, g/cm3 8.5
7.8
Embodied Carbon, kg CO2/kg material 13
1.8
Embodied Energy, MJ/kg 190
24
Embodied Water, L/kg 270
57

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 28
27 to 71
Strength to Weight: Bending, points 24
23 to 45
Thermal Shock Resistance, points 23
25 to 65

Alloy Composition

Aluminum (Al), % 0 to 0.35
0
Carbon (C), % 0 to 0.030
0.65 to 0.75
Chromium (Cr), % 19 to 22.5
0.9 to 1.2
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 2.3 to 15.3
93 to 95.8
Manganese (Mn), % 0 to 0.35
1.8 to 2.5
Molybdenum (Mo), % 7.0 to 9.5
0.9 to 1.4
Nickel (Ni), % 55 to 59
0 to 0.3
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 to 0.5
Sulfur (S), % 0 to 0.010
0 to 0.030
Titanium (Ti), % 1.0 to 1.7
0