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Nickel 725 vs. SAE-AISI M44 Steel

Nickel 725 belongs to the nickel alloys classification, while SAE-AISI M44 steel belongs to the iron alloys. They have a modest 20% of their average alloy composition in common, which, by itself, doesn't mean much. There are 19 material properties with values for both materials. Properties with values for just one material (13, in this case) are not shown.

For each property being compared, the top bar is nickel 725 and the bottom bar is SAE-AISI M44 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 78
78
Tensile Strength: Ultimate (UTS), MPa 860
870 to 2290

Thermal Properties

Latent Heat of Fusion, J/g 320
270
Melting Completion (Liquidus), °C 1340
1590
Melting Onset (Solidus), °C 1270
1540
Specific Heat Capacity, J/kg-K 440
440
Thermal Expansion, µm/m-K 13
12

Otherwise Unclassified Properties

Base Metal Price, % relative 75
43
Density, g/cm3 8.5
8.4
Embodied Carbon, kg CO2/kg material 13
9.9
Embodied Energy, MJ/kg 190
150
Embodied Water, L/kg 270
170

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 23
23
Strength to Weight: Axial, points 28
28 to 75
Strength to Weight: Bending, points 24
24 to 46
Thermal Shock Resistance, points 23
27 to 70

Alloy Composition

Aluminum (Al), % 0 to 0.35
0
Carbon (C), % 0 to 0.030
1.1 to 1.2
Chromium (Cr), % 19 to 22.5
4.0 to 4.8
Cobalt (Co), % 0
11 to 12.3
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 2.3 to 15.3
65.3 to 70.6
Manganese (Mn), % 0 to 0.35
0.2 to 0.4
Molybdenum (Mo), % 7.0 to 9.5
6.0 to 7.0
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
0.3 to 0.55
Sulfur (S), % 0 to 0.010
0 to 0.030
Titanium (Ti), % 1.0 to 1.7
0
Tungsten (W), % 0
5.0 to 5.8
Vanadium (V), % 0
1.9 to 2.2