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ACI-ASTM CA40 Steel vs. Nickel 725

ACI-ASTM CA40 steel belongs to the iron alloys classification, while nickel 725 belongs to the nickel alloys. They have a modest 23% of their average alloy composition in common, which, by itself, doesn't mean much. 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 ACI-ASTM CA40 steel and the bottom bar is nickel 725.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 10
34
Fatigue Strength, MPa 460
260
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
78
Tensile Strength: Ultimate (UTS), MPa 910
860
Tensile Strength: Yield (Proof), MPa 860
350

Thermal Properties

Latent Heat of Fusion, J/g 280
320
Maximum Temperature: Mechanical, °C 750
980
Melting Completion (Liquidus), °C 1440
1340
Melting Onset (Solidus), °C 1500
1270
Specific Heat Capacity, J/kg-K 480
440
Thermal Expansion, µm/m-K 10
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.0
1.5
Electrical Conductivity: Equal Weight (Specific), % IACS 3.5
1.6

Otherwise Unclassified Properties

Base Metal Price, % relative 7.5
75
Density, g/cm3 7.7
8.5
Embodied Carbon, kg CO2/kg material 2.0
13
Embodied Energy, MJ/kg 28
190
Embodied Water, L/kg 100
270

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 89
240
Resilience: Unit (Modulus of Resilience), kJ/m3 1910
300
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
23
Strength to Weight: Axial, points 33
28
Strength to Weight: Bending, points 27
24
Thermal Shock Resistance, points 33
23

Alloy Composition

Aluminum (Al), % 0
0 to 0.35
Carbon (C), % 0.2 to 0.4
0 to 0.030
Chromium (Cr), % 11.5 to 14
19 to 22.5
Iron (Fe), % 81.5 to 88.3
2.3 to 15.3
Manganese (Mn), % 0 to 1.0
0 to 0.35
Molybdenum (Mo), % 0 to 0.5
7.0 to 9.5
Nickel (Ni), % 0 to 1.0
55 to 59
Niobium (Nb), % 0
2.8 to 4.0
Phosphorus (P), % 0 to 0.040
0 to 0.015
Silicon (Si), % 0 to 1.5
0 to 0.2
Sulfur (S), % 0 to 0.040
0 to 0.010
Titanium (Ti), % 0
1.0 to 1.7