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S21640 Stainless Steel vs. Nickel 617

S21640 stainless steel belongs to the iron alloys classification, while nickel 617 belongs to the nickel alloys. They have a modest 28% 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 (3, in this case) are not shown.

For each property being compared, the top bar is S21640 stainless steel and the bottom bar is nickel 617.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
210
Elongation at Break, % 46
40
Fatigue Strength, MPa 320
220
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 78
80
Shear Strength, MPa 520
510
Tensile Strength: Ultimate (UTS), MPa 740
740
Tensile Strength: Yield (Proof), MPa 350
280

Thermal Properties

Latent Heat of Fusion, J/g 290
330
Maximum Temperature: Mechanical, °C 940
1010
Melting Completion (Liquidus), °C 1430
1380
Melting Onset (Solidus), °C 1380
1330
Specific Heat Capacity, J/kg-K 480
450
Thermal Conductivity, W/m-K 15
13
Thermal Expansion, µm/m-K 17
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
1.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.8
1.5

Otherwise Unclassified Properties

Base Metal Price, % relative 17
75
Density, g/cm3 7.7
8.5
Embodied Carbon, kg CO2/kg material 3.6
10
Embodied Energy, MJ/kg 51
140
Embodied Water, L/kg 150
350

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 280
230
Resilience: Unit (Modulus of Resilience), kJ/m3 300
190
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
23
Strength to Weight: Axial, points 27
24
Strength to Weight: Bending, points 23
21
Thermal Diffusivity, mm2/s 4.0
3.5
Thermal Shock Resistance, points 16
21

Alloy Composition

Aluminum (Al), % 0
0.8 to 1.5
Boron (B), % 0
0 to 0.0060
Carbon (C), % 0 to 0.080
0.050 to 0.15
Chromium (Cr), % 17.5 to 19.5
20 to 24
Cobalt (Co), % 0
10 to 15
Copper (Cu), % 0
0 to 0.5
Iron (Fe), % 63 to 74.3
0 to 3.0
Manganese (Mn), % 3.5 to 6.5
0 to 1.0
Molybdenum (Mo), % 0.5 to 2.0
8.0 to 10
Nickel (Ni), % 4.0 to 6.5
44.5 to 62
Niobium (Nb), % 0.1 to 1.0
0
Nitrogen (N), % 0.080 to 0.3
0
Phosphorus (P), % 0 to 0.060
0
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.015