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Nickel 625 vs. S20161 Stainless Steel

Nickel 625 belongs to the nickel alloys classification, while S20161 stainless steel belongs to the iron alloys. They have a modest 25% 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 (6, in this case) are not shown.

For each property being compared, the top bar is nickel 625 and the bottom bar is S20161 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 33 to 34
46
Fatigue Strength, MPa 240 to 320
360
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 79
76
Shear Strength, MPa 530 to 600
690
Tensile Strength: Ultimate (UTS), MPa 790 to 910
980
Tensile Strength: Yield (Proof), MPa 320 to 450
390

Thermal Properties

Latent Heat of Fusion, J/g 330
330
Maximum Temperature: Mechanical, °C 980
870
Melting Completion (Liquidus), °C 1350
1380
Melting Onset (Solidus), °C 1290
1330
Specific Heat Capacity, J/kg-K 440
490
Thermal Conductivity, W/m-K 11
15
Thermal Expansion, µm/m-K 13
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.3
2.5
Electrical Conductivity: Equal Weight (Specific), % IACS 1.4
2.9

Otherwise Unclassified Properties

Base Metal Price, % relative 80
12
Density, g/cm3 8.6
7.5
Embodied Carbon, kg CO2/kg material 14
2.7
Embodied Energy, MJ/kg 190
39
Embodied Water, L/kg 290
130

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 220 to 250
360
Resilience: Unit (Modulus of Resilience), kJ/m3 260 to 490
390
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 23
26
Strength to Weight: Axial, points 26 to 29
36
Strength to Weight: Bending, points 22 to 24
29
Thermal Diffusivity, mm2/s 2.9
4.0
Thermal Shock Resistance, points 22 to 25
22

Alloy Composition

Aluminum (Al), % 0 to 0.4
0
Carbon (C), % 0 to 0.1
0 to 0.15
Chromium (Cr), % 20 to 23
15 to 18
Cobalt (Co), % 0 to 1.0
0
Iron (Fe), % 0 to 5.0
65.6 to 73.9
Manganese (Mn), % 0 to 0.5
4.0 to 6.0
Molybdenum (Mo), % 8.0 to 10
0
Nickel (Ni), % 58 to 68.9
4.0 to 6.0
Niobium (Nb), % 3.2 to 4.2
0
Nitrogen (N), % 0
0.080 to 0.2
Phosphorus (P), % 0 to 0.015
0 to 0.040
Silicon (Si), % 0 to 0.5
3.0 to 4.0
Sulfur (S), % 0 to 0.015
0 to 0.040
Titanium (Ti), % 0 to 0.4
0