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Nickel 725 vs. EN 1.4434 Stainless Steel

Nickel 725 belongs to the nickel alloys classification, while EN 1.4434 stainless steel belongs to the iron alloys. They have 43% of their average alloy composition in common. 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 EN 1.4434 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 34
41
Fatigue Strength, MPa 260
270
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 78
79
Shear Strength, MPa 580
450
Tensile Strength: Ultimate (UTS), MPa 860
660
Tensile Strength: Yield (Proof), MPa 350
310

Thermal Properties

Latent Heat of Fusion, J/g 320
290
Maximum Temperature: Mechanical, °C 980
980
Melting Completion (Liquidus), °C 1340
1450
Melting Onset (Solidus), °C 1270
1400
Specific Heat Capacity, J/kg-K 440
470
Thermal Expansion, µm/m-K 13
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.5
2.3
Electrical Conductivity: Equal Weight (Specific), % IACS 1.6
2.6

Otherwise Unclassified Properties

Base Metal Price, % relative 75
21
Density, g/cm3 8.5
7.9
Embodied Carbon, kg CO2/kg material 13
4.2
Embodied Energy, MJ/kg 190
57
Embodied Water, L/kg 270
160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 240
220
Resilience: Unit (Modulus of Resilience), kJ/m3 300
240
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 28
23
Strength to Weight: Bending, points 24
21
Thermal Shock Resistance, points 23
15

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
16.5 to 19.5
Iron (Fe), % 2.3 to 15.3
59.2 to 69.9
Manganese (Mn), % 0 to 0.35
0 to 2.0
Molybdenum (Mo), % 7.0 to 9.5
3.0 to 4.0
Nickel (Ni), % 55 to 59
10.5 to 14
Niobium (Nb), % 2.8 to 4.0
0
Nitrogen (N), % 0
0.1 to 0.2
Phosphorus (P), % 0 to 0.015
0 to 0.045
Silicon (Si), % 0 to 0.2
0 to 1.0
Sulfur (S), % 0 to 0.010
0 to 0.015
Titanium (Ti), % 1.0 to 1.7
0