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Grade CX2M Nickel vs. S81921 Stainless Steel

Grade CX2M nickel belongs to the nickel alloys classification, while S81921 stainless steel belongs to the iron alloys. They have a modest 27% 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 (7, in this case) are not shown.

For each property being compared, the top bar is grade CX2M nickel and the bottom bar is S81921 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
200
Elongation at Break, % 45
29
Fatigue Strength, MPa 260
370
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 84
79
Tensile Strength: Ultimate (UTS), MPa 550
710
Tensile Strength: Yield (Proof), MPa 310
500

Thermal Properties

Latent Heat of Fusion, J/g 330
290
Maximum Temperature: Mechanical, °C 990
990
Melting Completion (Liquidus), °C 1500
1430
Melting Onset (Solidus), °C 1450
1390
Specific Heat Capacity, J/kg-K 430
480
Thermal Conductivity, W/m-K 10
15
Thermal Expansion, µm/m-K 12
13

Otherwise Unclassified Properties

Base Metal Price, % relative 65
14
Density, g/cm3 8.7
7.7
Embodied Carbon, kg CO2/kg material 12
2.9
Embodied Energy, MJ/kg 160
41
Embodied Water, L/kg 310
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 210
180
Resilience: Unit (Modulus of Resilience), kJ/m3 220
630
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 18
25
Strength to Weight: Bending, points 17
23
Thermal Diffusivity, mm2/s 2.7
4.0
Thermal Shock Resistance, points 15
20

Alloy Composition

Carbon (C), % 0 to 0.020
0 to 0.030
Chromium (Cr), % 22 to 24
19 to 22
Iron (Fe), % 0 to 1.5
66.7 to 75.9
Manganese (Mn), % 0 to 1.0
2.0 to 4.0
Molybdenum (Mo), % 15 to 16.5
1.0 to 2.0
Nickel (Ni), % 56.4 to 63
2.0 to 4.0
Nitrogen (N), % 0
0.14 to 0.2
Phosphorus (P), % 0 to 0.020
0 to 0.040
Silicon (Si), % 0 to 0.5
0 to 1.0
Sulfur (S), % 0 to 0.020
0 to 0.030