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Nickel 725 vs. AISI 304N Stainless Steel

Nickel 725 belongs to the nickel alloys classification, while AISI 304N stainless steel belongs to the iron alloys. They have a modest 37% 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 (6, in this case) are not shown.

For each property being compared, the top bar is nickel 725 and the bottom bar is AISI 304N stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 34
9.1 to 45
Fatigue Strength, MPa 260
220 to 440
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 78
77
Shear Strength, MPa 580
420 to 700
Tensile Strength: Ultimate (UTS), MPa 860
620 to 1180
Tensile Strength: Yield (Proof), MPa 350
270 to 850

Thermal Properties

Latent Heat of Fusion, J/g 320
290
Maximum Temperature: Mechanical, °C 980
960
Melting Completion (Liquidus), °C 1340
1420
Melting Onset (Solidus), °C 1270
1380
Specific Heat Capacity, J/kg-K 440
480
Thermal Expansion, µm/m-K 13
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.5
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 1.6
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 75
15
Density, g/cm3 8.5
7.8
Embodied Carbon, kg CO2/kg material 13
3.0
Embodied Energy, MJ/kg 190
43
Embodied Water, L/kg 270
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 240
98 to 280
Resilience: Unit (Modulus of Resilience), kJ/m3 300
180 to 1830
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 28
22 to 42
Strength to Weight: Bending, points 24
21 to 32
Thermal Shock Resistance, points 23
14 to 26

Alloy Composition

Aluminum (Al), % 0 to 0.35
0
Carbon (C), % 0 to 0.030
0 to 0.080
Chromium (Cr), % 19 to 22.5
18 to 20
Iron (Fe), % 2.3 to 15.3
66.4 to 73.9
Manganese (Mn), % 0 to 0.35
0 to 2.0
Molybdenum (Mo), % 7.0 to 9.5
0
Nickel (Ni), % 55 to 59
8.0 to 10.5
Niobium (Nb), % 2.8 to 4.0
0
Nitrogen (N), % 0
0.1 to 0.16
Phosphorus (P), % 0 to 0.015
0 to 0.045
Silicon (Si), % 0 to 0.2
0 to 0.75
Sulfur (S), % 0 to 0.010
0 to 0.030
Titanium (Ti), % 1.0 to 1.7
0