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AISI 409Cb Stainless Steel vs. ACI-ASTM CA40 Steel

Both AISI 409Cb stainless steel and ACI-ASTM CA40 steel are iron alloys. They have a very high 97% 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 409Cb stainless steel and the bottom bar is ACI-ASTM CA40 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 24
10
Fatigue Strength, MPa 140
460
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 75
76
Tensile Strength: Ultimate (UTS), MPa 420
910
Tensile Strength: Yield (Proof), MPa 200
860

Thermal Properties

Latent Heat of Fusion, J/g 270
280
Maximum Temperature: Corrosion, °C 440
390
Maximum Temperature: Mechanical, °C 710
750
Melting Completion (Liquidus), °C 1450
1440
Melting Onset (Solidus), °C 1410
1500
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 25
25
Thermal Expansion, µm/m-K 10
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
3.0
Electrical Conductivity: Equal Weight (Specific), % IACS 3.3
3.5

Otherwise Unclassified Properties

Base Metal Price, % relative 8.5
7.5
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 2.2
2.0
Embodied Energy, MJ/kg 31
28
Embodied Water, L/kg 94
100

Common Calculations

PREN (Pitting Resistance) 11
14
Resilience: Ultimate (Unit Rupture Work), MJ/m3 83
89
Resilience: Unit (Modulus of Resilience), kJ/m3 100
1910
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 15
33
Strength to Weight: Bending, points 16
27
Thermal Diffusivity, mm2/s 6.7
6.7
Thermal Shock Resistance, points 15
33

Alloy Composition

Carbon (C), % 0 to 0.060
0.2 to 0.4
Chromium (Cr), % 10.5 to 11.7
11.5 to 14
Iron (Fe), % 84.9 to 89.5
81.5 to 88.3
Manganese (Mn), % 0 to 1.0
0 to 1.0
Molybdenum (Mo), % 0
0 to 0.5
Nickel (Ni), % 0 to 0.5
0 to 1.0
Niobium (Nb), % 0 to 0.75
0
Phosphorus (P), % 0 to 0.045
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.5
Sulfur (S), % 0 to 0.040
0 to 0.040