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ACI-ASTM CA40 Steel vs. EN 1.3940 Stainless Steel

Both ACI-ASTM CA40 steel and EN 1.3940 stainless steel are iron alloys. They have 82% 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 ACI-ASTM CA40 steel and the bottom bar is EN 1.3940 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 10
34
Fatigue Strength, MPa 460
190
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
77
Tensile Strength: Ultimate (UTS), MPa 910
540
Tensile Strength: Yield (Proof), MPa 860
240

Thermal Properties

Latent Heat of Fusion, J/g 280
290
Maximum Temperature: Corrosion, °C 390
410
Maximum Temperature: Mechanical, °C 750
930
Melting Completion (Liquidus), °C 1440
1420
Melting Onset (Solidus), °C 1500
1380
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 25
15
Thermal Expansion, µm/m-K 10
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.0
2.3
Electrical Conductivity: Equal Weight (Specific), % IACS 3.5
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 7.5
17
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.0
3.3
Embodied Energy, MJ/kg 28
47
Embodied Water, L/kg 100
150

Common Calculations

PREN (Pitting Resistance) 14
20
Resilience: Ultimate (Unit Rupture Work), MJ/m3 89
150
Resilience: Unit (Modulus of Resilience), kJ/m3 1910
150
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 33
19
Strength to Weight: Bending, points 27
19
Thermal Diffusivity, mm2/s 6.7
4.1
Thermal Shock Resistance, points 33
16

Alloy Composition

Carbon (C), % 0.2 to 0.4
0 to 0.030
Chromium (Cr), % 11.5 to 14
16.5 to 18.5
Iron (Fe), % 81.5 to 88.3
64.2 to 71.4
Manganese (Mn), % 0 to 1.0
0 to 2.0
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 0 to 1.0
12 to 14
Nitrogen (N), % 0
0.1 to 0.2
Phosphorus (P), % 0 to 0.040
0 to 0.035
Silicon (Si), % 0 to 1.5
0 to 1.0
Sulfur (S), % 0 to 0.040
0 to 0.020