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S21640 Stainless Steel vs. N06650 Nickel

S21640 stainless steel belongs to the iron alloys classification, while N06650 nickel belongs to the nickel alloys. They have a modest 40% of their average alloy composition in common, which, by itself, doesn't mean much. There are 26 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 S21640 stainless steel and the bottom bar is N06650 nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
210
Elongation at Break, % 46
50
Fatigue Strength, MPa 320
420
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 78
82
Shear Strength, MPa 520
640
Tensile Strength: Ultimate (UTS), MPa 740
900
Tensile Strength: Yield (Proof), MPa 350
460

Thermal Properties

Latent Heat of Fusion, J/g 290
320
Maximum Temperature: Mechanical, °C 940
980
Melting Completion (Liquidus), °C 1430
1500
Melting Onset (Solidus), °C 1380
1450
Specific Heat Capacity, J/kg-K 480
440
Thermal Expansion, µm/m-K 17
12

Otherwise Unclassified Properties

Base Metal Price, % relative 17
60
Density, g/cm3 7.7
8.6
Embodied Carbon, kg CO2/kg material 3.6
10
Embodied Energy, MJ/kg 51
140
Embodied Water, L/kg 150
270

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 280
380
Resilience: Unit (Modulus of Resilience), kJ/m3 300
490
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
23
Strength to Weight: Axial, points 27
29
Strength to Weight: Bending, points 23
24
Thermal Shock Resistance, points 16
24

Alloy Composition

Aluminum (Al), % 0
0.050 to 0.5
Carbon (C), % 0 to 0.080
0 to 0.030
Chromium (Cr), % 17.5 to 19.5
19 to 21
Cobalt (Co), % 0
0 to 1.0
Copper (Cu), % 0
0 to 0.3
Iron (Fe), % 63 to 74.3
12 to 16
Manganese (Mn), % 3.5 to 6.5
0 to 0.5
Molybdenum (Mo), % 0.5 to 2.0
9.5 to 12.5
Nickel (Ni), % 4.0 to 6.5
44.4 to 58.9
Niobium (Nb), % 0.1 to 1.0
0.050 to 0.5
Nitrogen (N), % 0.080 to 0.3
0.050 to 0.2
Phosphorus (P), % 0 to 0.060
0 to 0.020
Silicon (Si), % 0 to 1.0
0 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.010
Tungsten (W), % 0
0.5 to 2.5