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S41050 Stainless Steel vs. ACI-ASTM CA40 Steel

Both S41050 stainless steel and ACI-ASTM CA40 steel are iron alloys. They have a very high 98% of their average alloy composition in common. There are 32 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 S41050 stainless steel and the bottom bar is ACI-ASTM CA40 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160
310
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 25
10
Fatigue Strength, MPa 160
460
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
76
Tensile Strength: Ultimate (UTS), MPa 470
910
Tensile Strength: Yield (Proof), MPa 230
860

Thermal Properties

Latent Heat of Fusion, J/g 270
280
Maximum Temperature: Corrosion, °C 390
390
Maximum Temperature: Mechanical, °C 720
750
Melting Completion (Liquidus), °C 1440
1440
Melting Onset (Solidus), °C 1400
1500
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 27
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 7.0
7.5
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 1.9
2.0
Embodied Energy, MJ/kg 27
28
Embodied Water, L/kg 97
100

Common Calculations

PREN (Pitting Resistance) 12
14
Resilience: Ultimate (Unit Rupture Work), MJ/m3 98
89
Resilience: Unit (Modulus of Resilience), kJ/m3 140
1910
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 17
33
Strength to Weight: Bending, points 17
27
Thermal Diffusivity, mm2/s 7.2
6.7
Thermal Shock Resistance, points 17
33

Alloy Composition

Carbon (C), % 0 to 0.040
0.2 to 0.4
Chromium (Cr), % 10.5 to 12.5
11.5 to 14
Iron (Fe), % 84.2 to 88.9
81.5 to 88.3
Manganese (Mn), % 0 to 1.0
0 to 1.0
Molybdenum (Mo), % 0
0 to 0.5
Nickel (Ni), % 0.6 to 1.1
0 to 1.0
Nitrogen (N), % 0 to 0.1
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 0.030
0 to 0.040