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Nickel 725 vs. S42300 Stainless Steel

Nickel 725 belongs to the nickel alloys classification, while S42300 stainless steel belongs to the iron alloys. They have a modest 24% of their average alloy composition in common, which, by itself, doesn't mean much. There are 29 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is nickel 725 and the bottom bar is S42300 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 34
9.1
Fatigue Strength, MPa 260
440
Poisson's Ratio 0.29
0.28
Reduction in Area, % 45
22
Shear Modulus, GPa 78
77
Shear Strength, MPa 580
650
Tensile Strength: Ultimate (UTS), MPa 860
1100
Tensile Strength: Yield (Proof), MPa 350
850

Thermal Properties

Latent Heat of Fusion, J/g 320
270
Maximum Temperature: Mechanical, °C 980
750
Melting Completion (Liquidus), °C 1340
1470
Melting Onset (Solidus), °C 1270
1420
Specific Heat Capacity, J/kg-K 440
470
Thermal Expansion, µm/m-K 13
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.5
4.5
Electrical Conductivity: Equal Weight (Specific), % IACS 1.6
5.2

Otherwise Unclassified Properties

Base Metal Price, % relative 75
9.5
Density, g/cm3 8.5
7.8
Embodied Carbon, kg CO2/kg material 13
3.2
Embodied Energy, MJ/kg 190
44
Embodied Water, L/kg 270
110

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 240
93
Resilience: Unit (Modulus of Resilience), kJ/m3 300
1840
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 28
39
Strength to Weight: Bending, points 24
30
Thermal Shock Resistance, points 23
40

Alloy Composition

Aluminum (Al), % 0 to 0.35
0
Carbon (C), % 0 to 0.030
0.27 to 0.32
Chromium (Cr), % 19 to 22.5
11 to 12
Iron (Fe), % 2.3 to 15.3
82 to 85.1
Manganese (Mn), % 0 to 0.35
1.0 to 1.4
Molybdenum (Mo), % 7.0 to 9.5
2.5 to 3.0
Nickel (Ni), % 55 to 59
0 to 0.5
Niobium (Nb), % 2.8 to 4.0
0
Phosphorus (P), % 0 to 0.015
0 to 0.025
Silicon (Si), % 0 to 0.2
0 to 0.5
Sulfur (S), % 0 to 0.010
0 to 0.025
Titanium (Ti), % 1.0 to 1.7
0
Vanadium (V), % 0
0.2 to 0.3