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ACI-ASTM CA40 Steel vs. S41041 Stainless Steel

Both ACI-ASTM CA40 steel and S41041 stainless steel are iron alloys. Both are furnished in the heat treated (HT) condition. 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 (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 S41041 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 310
240
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 10
17
Fatigue Strength, MPa 460
350
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
76
Tensile Strength: Ultimate (UTS), MPa 910
910
Tensile Strength: Yield (Proof), MPa 860
580

Thermal Properties

Latent Heat of Fusion, J/g 280
270
Maximum Temperature: Corrosion, °C 390
430
Maximum Temperature: Mechanical, °C 750
740
Melting Completion (Liquidus), °C 1440
1450
Melting Onset (Solidus), °C 1500
1410
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 25
29
Thermal Expansion, µm/m-K 10
10

Electrical Properties

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

Otherwise Unclassified Properties

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

Common Calculations

PREN (Pitting Resistance) 14
13
Resilience: Ultimate (Unit Rupture Work), MJ/m3 89
140
Resilience: Unit (Modulus of Resilience), kJ/m3 1910
860
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 33
32
Strength to Weight: Bending, points 27
27
Thermal Diffusivity, mm2/s 6.7
7.8
Thermal Shock Resistance, points 33
33

Alloy Composition

Aluminum (Al), % 0
0 to 0.050
Carbon (C), % 0.2 to 0.4
0.13 to 0.18
Chromium (Cr), % 11.5 to 14
11.5 to 13
Iron (Fe), % 81.5 to 88.3
84.5 to 87.8
Manganese (Mn), % 0 to 1.0
0.4 to 0.6
Molybdenum (Mo), % 0 to 0.5
0 to 0.2
Nickel (Ni), % 0 to 1.0
0 to 0.5
Niobium (Nb), % 0
0.15 to 0.45
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 0 to 1.5
0 to 0.5
Sulfur (S), % 0 to 0.040
0 to 0.030