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S17400 Stainless Steel vs. Nickel 625

S17400 stainless steel belongs to the iron alloys classification, while nickel 625 belongs to the nickel alloys. They have a modest 23% 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 (7, in this case) are not shown.

For each property being compared, the top bar is S17400 stainless steel and the bottom bar is nickel 625.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 11 to 21
33 to 34
Fatigue Strength, MPa 380 to 670
240 to 320
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 75
79
Shear Strength, MPa 570 to 830
530 to 600
Tensile Strength: Ultimate (UTS), MPa 910 to 1390
790 to 910
Tensile Strength: Yield (Proof), MPa 580 to 1250
320 to 450

Thermal Properties

Latent Heat of Fusion, J/g 280
330
Maximum Temperature: Mechanical, °C 850
980
Melting Completion (Liquidus), °C 1440
1350
Melting Onset (Solidus), °C 1400
1290
Specific Heat Capacity, J/kg-K 480
440
Thermal Conductivity, W/m-K 17
11
Thermal Expansion, µm/m-K 11
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.3
1.3
Electrical Conductivity: Equal Weight (Specific), % IACS 2.6
1.4

Otherwise Unclassified Properties

Base Metal Price, % relative 14
80
Density, g/cm3 7.8
8.6
Embodied Carbon, kg CO2/kg material 2.7
14
Embodied Energy, MJ/kg 39
190
Embodied Water, L/kg 130
290

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 160
220 to 250
Resilience: Unit (Modulus of Resilience), kJ/m3 880 to 4060
260 to 490
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
23
Strength to Weight: Axial, points 32 to 49
26 to 29
Strength to Weight: Bending, points 27 to 35
22 to 24
Thermal Diffusivity, mm2/s 4.5
2.9
Thermal Shock Resistance, points 30 to 46
22 to 25

Alloy Composition

Aluminum (Al), % 0
0 to 0.4
Carbon (C), % 0 to 0.070
0 to 0.1
Chromium (Cr), % 15 to 17
20 to 23
Cobalt (Co), % 0
0 to 1.0
Copper (Cu), % 3.0 to 5.0
0
Iron (Fe), % 70.4 to 78.9
0 to 5.0
Manganese (Mn), % 0 to 1.0
0 to 0.5
Molybdenum (Mo), % 0
8.0 to 10
Nickel (Ni), % 3.0 to 5.0
58 to 68.9
Niobium (Nb), % 0.15 to 0.45
3.2 to 4.2
Phosphorus (P), % 0 to 0.040
0 to 0.015
Silicon (Si), % 0 to 1.0
0 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.015
Titanium (Ti), % 0
0 to 0.4