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Nickel 625 vs. S31100 Stainless Steel

Nickel 625 belongs to the nickel alloys classification, while S31100 stainless steel belongs to the iron alloys. They have a modest 31% 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 S31100 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 33 to 34
4.5
Fatigue Strength, MPa 240 to 320
330
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 79
79
Shear Strength, MPa 530 to 600
580
Tensile Strength: Ultimate (UTS), MPa 790 to 910
1000
Tensile Strength: Yield (Proof), MPa 320 to 450
710

Thermal Properties

Latent Heat of Fusion, J/g 330
300
Maximum Temperature: Mechanical, °C 980
1100
Melting Completion (Liquidus), °C 1350
1420
Melting Onset (Solidus), °C 1290
1380
Specific Heat Capacity, J/kg-K 440
480
Thermal Conductivity, W/m-K 11
16
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.3
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 1.4
2.4

Otherwise Unclassified Properties

Base Metal Price, % relative 80
16
Density, g/cm3 8.6
7.7
Embodied Carbon, kg CO2/kg material 14
3.1
Embodied Energy, MJ/kg 190
44
Embodied Water, L/kg 290
170

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 220 to 250
40
Resilience: Unit (Modulus of Resilience), kJ/m3 260 to 490
1240
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 26 to 29
36
Strength to Weight: Bending, points 22 to 24
29
Thermal Diffusivity, mm2/s 2.9
4.2
Thermal Shock Resistance, points 22 to 25
28

Alloy Composition

Aluminum (Al), % 0 to 0.4
0
Carbon (C), % 0 to 0.1
0 to 0.060
Chromium (Cr), % 20 to 23
25 to 27
Cobalt (Co), % 0 to 1.0
0
Iron (Fe), % 0 to 5.0
63.6 to 69
Manganese (Mn), % 0 to 0.5
0 to 1.0
Molybdenum (Mo), % 8.0 to 10
0
Nickel (Ni), % 58 to 68.9
6.0 to 7.0
Niobium (Nb), % 3.2 to 4.2
0
Phosphorus (P), % 0 to 0.015
0 to 0.045
Silicon (Si), % 0 to 0.5
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.030
Titanium (Ti), % 0 to 0.4
0 to 0.25