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Nickel 725 vs. ACI-ASTM CK3MCuN Steel

Nickel 725 belongs to the nickel alloys classification, while ACI-ASTM CK3MCuN steel belongs to the iron alloys. They have 54% of their average alloy composition in common. There are 27 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is nickel 725 and the bottom bar is ACI-ASTM CK3MCuN steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 34
39
Fatigue Strength, MPa 260
250
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 78
80
Tensile Strength: Ultimate (UTS), MPa 860
620
Tensile Strength: Yield (Proof), MPa 350
290

Thermal Properties

Latent Heat of Fusion, J/g 320
300
Maximum Temperature: Mechanical, °C 980
1090
Melting Completion (Liquidus), °C 1340
1460
Melting Onset (Solidus), °C 1270
1350
Specific Heat Capacity, J/kg-K 440
460
Thermal Expansion, µm/m-K 13
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.5
1.9
Electrical Conductivity: Equal Weight (Specific), % IACS 1.6
2.1

Otherwise Unclassified Properties

Base Metal Price, % relative 75
29
Density, g/cm3 8.5
8.0
Embodied Carbon, kg CO2/kg material 13
5.6
Embodied Energy, MJ/kg 190
76
Embodied Water, L/kg 270
190

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 240
200
Resilience: Unit (Modulus of Resilience), kJ/m3 300
210
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 28
21
Strength to Weight: Bending, points 24
20
Thermal Shock Resistance, points 23
14

Alloy Composition

Aluminum (Al), % 0 to 0.35
0
Carbon (C), % 0 to 0.030
0 to 0.025
Chromium (Cr), % 19 to 22.5
19.5 to 20.5
Copper (Cu), % 0
0.5 to 1.0
Iron (Fe), % 2.3 to 15.3
49.5 to 56.3
Manganese (Mn), % 0 to 0.35
0 to 1.2
Molybdenum (Mo), % 7.0 to 9.5
6.0 to 7.0
Nickel (Ni), % 55 to 59
17.5 to 19.5
Niobium (Nb), % 2.8 to 4.0
0
Nitrogen (N), % 0
0.18 to 0.24
Phosphorus (P), % 0 to 0.015
0 to 0.045
Silicon (Si), % 0 to 0.2
0 to 1.0
Sulfur (S), % 0 to 0.010
0 to 0.010
Titanium (Ti), % 1.0 to 1.7
0