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Nickel 625 vs. S44537 Stainless Steel

Nickel 625 belongs to the nickel alloys classification, while S44537 stainless steel belongs to the iron alloys. They have a modest 26% of their average alloy composition in common, which, by itself, doesn't mean much. There are 30 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is nickel 625 and the bottom bar is S44537 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 33 to 34
21
Fatigue Strength, MPa 240 to 320
230
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 79
79
Shear Strength, MPa 530 to 600
320
Tensile Strength: Ultimate (UTS), MPa 790 to 910
510
Tensile Strength: Yield (Proof), MPa 320 to 450
360

Thermal Properties

Latent Heat of Fusion, J/g 330
290
Maximum Temperature: Mechanical, °C 980
1000
Melting Completion (Liquidus), °C 1350
1480
Melting Onset (Solidus), °C 1290
1430
Specific Heat Capacity, J/kg-K 440
470
Thermal Conductivity, W/m-K 11
21
Thermal Expansion, µm/m-K 13
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.3
2.6
Electrical Conductivity: Equal Weight (Specific), % IACS 1.4
3.0

Otherwise Unclassified Properties

Base Metal Price, % relative 80
19
Density, g/cm3 8.6
7.9
Embodied Carbon, kg CO2/kg material 14
3.4
Embodied Energy, MJ/kg 190
50
Embodied Water, L/kg 290
140

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 220 to 250
95
Resilience: Unit (Modulus of Resilience), kJ/m3 260 to 490
320
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 26 to 29
18
Strength to Weight: Bending, points 22 to 24
18
Thermal Diffusivity, mm2/s 2.9
5.6
Thermal Shock Resistance, points 22 to 25
17

Alloy Composition

Aluminum (Al), % 0 to 0.4
0 to 0.1
Carbon (C), % 0 to 0.1
0 to 0.030
Chromium (Cr), % 20 to 23
20 to 24
Cobalt (Co), % 0 to 1.0
0
Copper (Cu), % 0
0 to 0.5
Iron (Fe), % 0 to 5.0
69 to 78.6
Lanthanum (La), % 0
0.040 to 0.2
Manganese (Mn), % 0 to 0.5
0 to 0.8
Molybdenum (Mo), % 8.0 to 10
0
Nickel (Ni), % 58 to 68.9
0 to 0.5
Niobium (Nb), % 3.2 to 4.2
0.2 to 1.0
Nitrogen (N), % 0
0 to 0.040
Phosphorus (P), % 0 to 0.015
0 to 0.050
Silicon (Si), % 0 to 0.5
0.1 to 0.6
Sulfur (S), % 0 to 0.015
0 to 0.0060
Titanium (Ti), % 0 to 0.4
0.020 to 0.2
Tungsten (W), % 0
1.0 to 3.0