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AISI 309 Stainless Steel vs. Grade CY40 Nickel

AISI 309 stainless steel belongs to the iron alloys classification, while grade CY40 nickel belongs to the nickel alloys. They have a modest 36% of their average alloy composition in common, which, by itself, doesn't mean much. There are 29 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is AISI 309 stainless steel and the bottom bar is grade CY40 nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 34 to 47
34
Fatigue Strength, MPa 250 to 280
160
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 78
74
Tensile Strength: Ultimate (UTS), MPa 600 to 710
540
Tensile Strength: Yield (Proof), MPa 260 to 350
220

Thermal Properties

Latent Heat of Fusion, J/g 290
330
Maximum Temperature: Mechanical, °C 980
960
Melting Completion (Liquidus), °C 1450
1350
Melting Onset (Solidus), °C 1400
1300
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 16
14
Thermal Expansion, µm/m-K 15
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
1.8

Otherwise Unclassified Properties

Base Metal Price, % relative 19
55
Density, g/cm3 7.8
8.4
Embodied Carbon, kg CO2/kg material 3.6
9.1
Embodied Energy, MJ/kg 51
130
Embodied Water, L/kg 170
260

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 200 to 230
150
Resilience: Unit (Modulus of Resilience), kJ/m3 170 to 310
130
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
23
Strength to Weight: Axial, points 21 to 25
18
Strength to Weight: Bending, points 20 to 23
18
Thermal Diffusivity, mm2/s 4.3
3.7
Thermal Shock Resistance, points 14 to 16
16

Alloy Composition

Carbon (C), % 0 to 0.2
0 to 0.4
Chromium (Cr), % 22 to 24
14 to 17
Iron (Fe), % 58 to 66
0 to 11
Manganese (Mn), % 0 to 2.0
0 to 1.5
Nickel (Ni), % 12 to 15
67 to 86
Phosphorus (P), % 0 to 0.045
0 to 0.030
Silicon (Si), % 0 to 0.75
0 to 3.0
Sulfur (S), % 0 to 0.030
0 to 0.030