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ACI-ASTM CA40 Steel vs. S82031 Stainless Steel

Both ACI-ASTM CA40 steel and S82031 stainless steel are iron alloys. They have 88% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is ACI-ASTM CA40 steel and the bottom bar is S82031 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 10
39
Fatigue Strength, MPa 460
490
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
78
Tensile Strength: Ultimate (UTS), MPa 910
780
Tensile Strength: Yield (Proof), MPa 860
570

Thermal Properties

Latent Heat of Fusion, J/g 280
290
Maximum Temperature: Corrosion, °C 390
430
Maximum Temperature: Mechanical, °C 750
980
Melting Completion (Liquidus), °C 1440
1430
Melting Onset (Solidus), °C 1500
1390
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 25
15
Thermal Expansion, µm/m-K 10
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.0
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 3.5
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 7.5
13
Density, g/cm3 7.7
7.7
Embodied Carbon, kg CO2/kg material 2.0
2.8
Embodied Energy, MJ/kg 28
39
Embodied Water, L/kg 100
150

Common Calculations

PREN (Pitting Resistance) 14
27
Resilience: Ultimate (Unit Rupture Work), MJ/m3 89
280
Resilience: Unit (Modulus of Resilience), kJ/m3 1910
820
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 33
28
Strength to Weight: Bending, points 27
24
Thermal Diffusivity, mm2/s 6.7
3.9
Thermal Shock Resistance, points 33
22

Alloy Composition

Carbon (C), % 0.2 to 0.4
0 to 0.050
Chromium (Cr), % 11.5 to 14
19 to 22
Copper (Cu), % 0
0 to 1.0
Iron (Fe), % 81.5 to 88.3
68 to 78.3
Manganese (Mn), % 0 to 1.0
0 to 2.5
Molybdenum (Mo), % 0 to 0.5
0.6 to 1.4
Nickel (Ni), % 0 to 1.0
2.0 to 4.0
Nitrogen (N), % 0
0.14 to 0.24
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.5
0 to 0.8
Sulfur (S), % 0 to 0.040
0 to 0.0050