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Nickel 617 vs. S21900 Stainless Steel

Nickel 617 belongs to the nickel alloys classification, while S21900 stainless steel belongs to the iron alloys. They have a modest 29% 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 (4, in this case) are not shown.

For each property being compared, the top bar is nickel 617 and the bottom bar is S21900 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
200
Elongation at Break, % 40
50
Fatigue Strength, MPa 220
380
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 80
78
Shear Strength, MPa 510
510
Tensile Strength: Ultimate (UTS), MPa 740
710
Tensile Strength: Yield (Proof), MPa 280
390

Thermal Properties

Latent Heat of Fusion, J/g 330
290
Maximum Temperature: Mechanical, °C 1010
980
Melting Completion (Liquidus), °C 1380
1400
Melting Onset (Solidus), °C 1330
1350
Specific Heat Capacity, J/kg-K 450
480
Thermal Conductivity, W/m-K 13
14
Thermal Expansion, µm/m-K 12
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.4
2.5
Electrical Conductivity: Equal Weight (Specific), % IACS 1.5
2.9

Otherwise Unclassified Properties

Base Metal Price, % relative 75
15
Density, g/cm3 8.5
7.7
Embodied Carbon, kg CO2/kg material 10
3.0
Embodied Energy, MJ/kg 140
43
Embodied Water, L/kg 350
160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 230
300
Resilience: Unit (Modulus of Resilience), kJ/m3 190
380
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 24
26
Strength to Weight: Bending, points 21
23
Thermal Diffusivity, mm2/s 3.5
3.8
Thermal Shock Resistance, points 21
15

Alloy Composition

Aluminum (Al), % 0.8 to 1.5
0
Boron (B), % 0 to 0.0060
0
Carbon (C), % 0.050 to 0.15
0 to 0.080
Chromium (Cr), % 20 to 24
19 to 21.5
Cobalt (Co), % 10 to 15
0
Copper (Cu), % 0 to 0.5
0
Iron (Fe), % 0 to 3.0
59.4 to 67.4
Manganese (Mn), % 0 to 1.0
8.0 to 10
Molybdenum (Mo), % 8.0 to 10
0
Nickel (Ni), % 44.5 to 62
5.5 to 7.5
Nitrogen (N), % 0
0.15 to 0.4
Phosphorus (P), % 0
0 to 0.045
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.030