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Nickel 725 vs. S45000 Stainless Steel

Nickel 725 belongs to the nickel alloys classification, while S45000 stainless steel belongs to the iron alloys. They have a modest 31% 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 S45000 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 34
6.8 to 14
Fatigue Strength, MPa 260
330 to 650
Poisson's Ratio 0.29
0.28
Reduction in Area, % 45
22 to 50
Shear Modulus, GPa 78
76
Shear Strength, MPa 580
590 to 830
Tensile Strength: Ultimate (UTS), MPa 860
980 to 1410
Tensile Strength: Yield (Proof), MPa 350
580 to 1310

Thermal Properties

Latent Heat of Fusion, J/g 320
280
Maximum Temperature: Mechanical, °C 980
840
Melting Completion (Liquidus), °C 1340
1440
Melting Onset (Solidus), °C 1270
1390
Specific Heat Capacity, J/kg-K 440
480
Thermal Expansion, µm/m-K 13
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.5
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 1.6
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 75
13
Density, g/cm3 8.5
7.8
Embodied Carbon, kg CO2/kg material 13
2.8
Embodied Energy, MJ/kg 190
39
Embodied Water, L/kg 270
130

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 240
94 to 160
Resilience: Unit (Modulus of Resilience), kJ/m3 300
850 to 4400
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 28
35 to 50
Strength to Weight: Bending, points 24
28 to 36
Thermal Shock Resistance, points 23
33 to 47

Alloy Composition

Aluminum (Al), % 0 to 0.35
0
Carbon (C), % 0 to 0.030
0 to 0.050
Chromium (Cr), % 19 to 22.5
14 to 16
Copper (Cu), % 0
1.3 to 1.8
Iron (Fe), % 2.3 to 15.3
72.1 to 79.3
Manganese (Mn), % 0 to 0.35
0 to 1.0
Molybdenum (Mo), % 7.0 to 9.5
0.5 to 1.0
Nickel (Ni), % 55 to 59
5.0 to 7.0
Niobium (Nb), % 2.8 to 4.0
0
Phosphorus (P), % 0 to 0.015
0 to 0.040
Silicon (Si), % 0 to 0.2
0 to 1.0
Sulfur (S), % 0 to 0.010
0 to 0.030
Titanium (Ti), % 1.0 to 1.7
0