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S21900 Stainless Steel vs. EN 2.4669 Nickel

S21900 stainless steel belongs to the iron alloys classification, while EN 2.4669 nickel belongs to the nickel alloys. They have a modest 30% of their average alloy composition in common, which, by itself, doesn't mean much. There are 31 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 S21900 stainless steel and the bottom bar is EN 2.4669 nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 50
16
Fatigue Strength, MPa 380
390
Poisson's Ratio 0.28
0.29
Reduction in Area, % 57
31
Shear Modulus, GPa 78
73
Shear Strength, MPa 510
680
Tensile Strength: Ultimate (UTS), MPa 710
1110
Tensile Strength: Yield (Proof), MPa 390
720

Thermal Properties

Latent Heat of Fusion, J/g 290
310
Maximum Temperature: Mechanical, °C 980
960
Melting Completion (Liquidus), °C 1400
1380
Melting Onset (Solidus), °C 1350
1330
Specific Heat Capacity, J/kg-K 480
460
Thermal Conductivity, W/m-K 14
12
Thermal Expansion, µm/m-K 17
13

Electrical Properties

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

Otherwise Unclassified Properties

Base Metal Price, % relative 15
60
Density, g/cm3 7.7
8.4
Embodied Carbon, kg CO2/kg material 3.0
10
Embodied Energy, MJ/kg 43
150
Embodied Water, L/kg 160
260

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 300
160
Resilience: Unit (Modulus of Resilience), kJ/m3 380
1380
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
23
Strength to Weight: Axial, points 26
37
Strength to Weight: Bending, points 23
28
Thermal Diffusivity, mm2/s 3.8
3.1
Thermal Shock Resistance, points 15
33

Alloy Composition

Aluminum (Al), % 0
0.4 to 1.0
Carbon (C), % 0 to 0.080
0 to 0.080
Chromium (Cr), % 19 to 21.5
14 to 17
Cobalt (Co), % 0
0 to 1.0
Copper (Cu), % 0
0 to 0.5
Iron (Fe), % 59.4 to 67.4
5.0 to 9.0
Manganese (Mn), % 8.0 to 10
0 to 1.0
Nickel (Ni), % 5.5 to 7.5
65.9 to 77.7
Niobium (Nb), % 0
0.7 to 1.2
Nitrogen (N), % 0.15 to 0.4
0
Phosphorus (P), % 0 to 0.045
0 to 0.020
Silicon (Si), % 0 to 1.0
0 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.015
Titanium (Ti), % 0
2.3 to 2.8