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S21640 Stainless Steel vs. EN 2.4680 Cast Nickel

S21640 stainless steel belongs to the iron alloys classification, while EN 2.4680 cast nickel belongs to the nickel alloys. They have a modest 26% of their average alloy composition in common, which, by itself, doesn't mean much. There are 27 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is S21640 stainless steel and the bottom bar is EN 2.4680 cast nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
210
Elongation at Break, % 46
9.1
Fatigue Strength, MPa 320
120
Poisson's Ratio 0.28
0.26
Shear Modulus, GPa 78
84
Tensile Strength: Ultimate (UTS), MPa 740
600
Tensile Strength: Yield (Proof), MPa 350
260

Thermal Properties

Latent Heat of Fusion, J/g 290
350
Maximum Temperature: Mechanical, °C 940
1050
Melting Completion (Liquidus), °C 1430
1360
Melting Onset (Solidus), °C 1380
1320
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 15
14
Thermal Expansion, µm/m-K 17
15

Otherwise Unclassified Properties

Base Metal Price, % relative 17
60
Density, g/cm3 7.7
8.0
Embodied Carbon, kg CO2/kg material 3.6
9.1
Embodied Energy, MJ/kg 51
130
Embodied Water, L/kg 150
350

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 280
45
Resilience: Unit (Modulus of Resilience), kJ/m3 300
160
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 27
21
Strength to Weight: Bending, points 23
20
Thermal Diffusivity, mm2/s 4.0
3.7
Thermal Shock Resistance, points 16
14

Alloy Composition

Carbon (C), % 0 to 0.080
0 to 0.1
Chromium (Cr), % 17.5 to 19.5
48 to 52
Iron (Fe), % 63 to 74.3
0 to 1.0
Manganese (Mn), % 3.5 to 6.5
0 to 0.5
Molybdenum (Mo), % 0.5 to 2.0
0 to 0.5
Nickel (Ni), % 4.0 to 6.5
42.9 to 51
Niobium (Nb), % 0.1 to 1.0
1.0 to 1.8
Nitrogen (N), % 0.080 to 0.3
0 to 0.16
Phosphorus (P), % 0 to 0.060
0 to 0.020
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.020