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S21904 Stainless Steel vs. Grade CX2M Nickel

S21904 stainless steel belongs to the iron alloys classification, while grade CX2M nickel 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 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 S21904 stainless steel and the bottom bar is grade CX2M nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
220
Elongation at Break, % 17 to 51
45
Fatigue Strength, MPa 380 to 550
260
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 78
84
Tensile Strength: Ultimate (UTS), MPa 700 to 1000
550
Tensile Strength: Yield (Proof), MPa 390 to 910
310

Thermal Properties

Latent Heat of Fusion, J/g 290
330
Maximum Temperature: Mechanical, °C 980
990
Melting Completion (Liquidus), °C 1400
1500
Melting Onset (Solidus), °C 1350
1450
Specific Heat Capacity, J/kg-K 480
430
Thermal Conductivity, W/m-K 14
10
Thermal Expansion, µm/m-K 17
12

Otherwise Unclassified Properties

Base Metal Price, % relative 15
65
Density, g/cm3 7.7
8.7
Embodied Carbon, kg CO2/kg material 3.0
12
Embodied Energy, MJ/kg 43
160
Embodied Water, L/kg 160
310

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 160 to 310
210
Resilience: Unit (Modulus of Resilience), kJ/m3 380 to 2070
220
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
23
Strength to Weight: Axial, points 25 to 36
18
Strength to Weight: Bending, points 23 to 29
17
Thermal Diffusivity, mm2/s 3.8
2.7
Thermal Shock Resistance, points 15 to 21
15

Alloy Composition

Carbon (C), % 0 to 0.040
0 to 0.020
Chromium (Cr), % 19 to 21.5
22 to 24
Iron (Fe), % 59.5 to 67.4
0 to 1.5
Manganese (Mn), % 8.0 to 10
0 to 1.0
Molybdenum (Mo), % 0
15 to 16.5
Nickel (Ni), % 5.5 to 7.5
56.4 to 63
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 0.020