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Nickel 725 vs. S32003 Stainless Steel

Nickel 725 belongs to the nickel alloys classification, while S32003 stainless steel belongs to the iron alloys. They have a modest 35% of their average alloy composition in common, which, by itself, doesn't mean much. There are 28 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 S32003 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 34
28
Fatigue Strength, MPa 260
370
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 78
79
Shear Strength, MPa 580
480
Tensile Strength: Ultimate (UTS), MPa 860
730
Tensile Strength: Yield (Proof), MPa 350
510

Thermal Properties

Latent Heat of Fusion, J/g 320
290
Maximum Temperature: Mechanical, °C 980
1010
Melting Completion (Liquidus), °C 1340
1440
Melting Onset (Solidus), °C 1270
1400
Specific Heat Capacity, J/kg-K 440
480
Thermal Expansion, µm/m-K 13
13

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
14
Density, g/cm3 8.5
7.8
Embodied Carbon, kg CO2/kg material 13
3.0
Embodied Energy, MJ/kg 190
42
Embodied Water, L/kg 270
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 240
180
Resilience: Unit (Modulus of Resilience), kJ/m3 300
660
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 28
26
Strength to Weight: Bending, points 24
23
Thermal Shock Resistance, points 23
21

Alloy Composition

Aluminum (Al), % 0 to 0.35
0
Carbon (C), % 0 to 0.030
0 to 0.030
Chromium (Cr), % 19 to 22.5
19.5 to 22.5
Iron (Fe), % 2.3 to 15.3
68.2 to 75.9
Manganese (Mn), % 0 to 0.35
0 to 2.0
Molybdenum (Mo), % 7.0 to 9.5
1.5 to 2.0
Nickel (Ni), % 55 to 59
3.0 to 4.0
Niobium (Nb), % 2.8 to 4.0
0
Nitrogen (N), % 0
0.14 to 0.2
Phosphorus (P), % 0 to 0.015
0 to 0.030
Silicon (Si), % 0 to 0.2
0 to 1.0
Sulfur (S), % 0 to 0.010
0 to 0.020
Titanium (Ti), % 1.0 to 1.7
0