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Nickel 725 vs. S46500 Stainless Steel

Nickel 725 belongs to the nickel alloys classification, while S46500 stainless steel belongs to the iron alloys. They have a modest 34% of their average alloy composition in common, which, by itself, doesn't mean much. There are 25 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 S46500 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 34
2.3 to 14
Fatigue Strength, MPa 260
550 to 890
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 78
75
Shear Strength, MPa 580
730 to 1120
Tensile Strength: Ultimate (UTS), MPa 860
1260 to 1930
Tensile Strength: Yield (Proof), MPa 350
1120 to 1810

Thermal Properties

Latent Heat of Fusion, J/g 320
280
Maximum Temperature: Mechanical, °C 980
780
Melting Completion (Liquidus), °C 1340
1450
Melting Onset (Solidus), °C 1270
1410
Specific Heat Capacity, J/kg-K 440
470
Thermal Expansion, µm/m-K 13
11

Otherwise Unclassified Properties

Base Metal Price, % relative 75
15
Density, g/cm3 8.5
7.9
Embodied Carbon, kg CO2/kg material 13
3.6
Embodied Energy, MJ/kg 190
51
Embodied Water, L/kg 270
120

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 240
43 to 210
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 28
44 to 68
Strength to Weight: Bending, points 24
33 to 44
Thermal Shock Resistance, points 23
44 to 67

Alloy Composition

Aluminum (Al), % 0 to 0.35
0
Carbon (C), % 0 to 0.030
0 to 0.020
Chromium (Cr), % 19 to 22.5
11 to 12.5
Iron (Fe), % 2.3 to 15.3
72.6 to 76.1
Manganese (Mn), % 0 to 0.35
0 to 0.25
Molybdenum (Mo), % 7.0 to 9.5
0.75 to 1.3
Nickel (Ni), % 55 to 59
10.7 to 11.3
Niobium (Nb), % 2.8 to 4.0
0
Nitrogen (N), % 0
0 to 0.010
Phosphorus (P), % 0 to 0.015
0 to 0.015
Silicon (Si), % 0 to 0.2
0 to 0.25
Sulfur (S), % 0 to 0.010
0 to 0.010
Titanium (Ti), % 1.0 to 1.7
1.5 to 1.8