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AISI 409 Stainless Steel vs. ACI-ASTM CK3MCuN Steel

Both AISI 409 stainless steel and ACI-ASTM CK3MCuN steel are iron alloys. They have 65% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is AISI 409 stainless steel and the bottom bar is ACI-ASTM CK3MCuN steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 24
39
Fatigue Strength, MPa 140
250
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 75
80
Tensile Strength: Ultimate (UTS), MPa 420
620
Tensile Strength: Yield (Proof), MPa 200
290

Thermal Properties

Latent Heat of Fusion, J/g 270
300
Maximum Temperature: Corrosion, °C 450
420
Maximum Temperature: Mechanical, °C 710
1090
Melting Completion (Liquidus), °C 1450
1460
Melting Onset (Solidus), °C 1400
1350
Specific Heat Capacity, J/kg-K 480
460
Thermal Conductivity, W/m-K 25
12
Thermal Expansion, µm/m-K 11
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
1.9
Electrical Conductivity: Equal Weight (Specific), % IACS 3.3
2.1

Otherwise Unclassified Properties

Base Metal Price, % relative 6.5
29
Density, g/cm3 7.7
8.0
Embodied Carbon, kg CO2/kg material 2.0
5.6
Embodied Energy, MJ/kg 28
76
Embodied Water, L/kg 94
190

Common Calculations

PREN (Pitting Resistance) 11
45
Resilience: Ultimate (Unit Rupture Work), MJ/m3 83
200
Resilience: Unit (Modulus of Resilience), kJ/m3 100
210
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 15
21
Strength to Weight: Bending, points 16
20
Thermal Diffusivity, mm2/s 6.7
3.2
Thermal Shock Resistance, points 15
14

Alloy Composition

Carbon (C), % 0 to 0.080
0 to 0.025
Chromium (Cr), % 10.5 to 11.7
19.5 to 20.5
Copper (Cu), % 0
0.5 to 1.0
Iron (Fe), % 84.9 to 89.5
49.5 to 56.3
Manganese (Mn), % 0 to 1.0
0 to 1.2
Molybdenum (Mo), % 0
6.0 to 7.0
Nickel (Ni), % 0 to 0.5
17.5 to 19.5
Nitrogen (N), % 0
0.18 to 0.24
Phosphorus (P), % 0 to 0.045
0 to 0.045
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.010
Titanium (Ti), % 0 to 0.75
0