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ACI-ASTM CA40F Steel vs. S44635 Stainless Steel

Both ACI-ASTM CA40F steel and S44635 stainless steel are iron alloys. They have 79% 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 ACI-ASTM CA40F steel and the bottom bar is S44635 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 230
240
Elastic (Young's, Tensile) Modulus, GPa 190
210
Elongation at Break, % 13
23
Fatigue Strength, MPa 320
390
Poisson's Ratio 0.28
0.27
Shear Modulus, GPa 76
81
Tensile Strength: Ultimate (UTS), MPa 770
710
Tensile Strength: Yield (Proof), MPa 550
580

Thermal Properties

Latent Heat of Fusion, J/g 280
300
Maximum Temperature: Corrosion, °C 390
610
Maximum Temperature: Mechanical, °C 750
1100
Melting Completion (Liquidus), °C 1430
1460
Melting Onset (Solidus), °C 1390
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 27
16
Thermal Expansion, µm/m-K 10
11

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
22
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.0
4.4
Embodied Energy, MJ/kg 28
62
Embodied Water, L/kg 100
170

Common Calculations

PREN (Pitting Resistance) 14
39
Resilience: Ultimate (Unit Rupture Work), MJ/m3 94
150
Resilience: Unit (Modulus of Resilience), kJ/m3 790
810
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 28
25
Strength to Weight: Bending, points 24
23
Thermal Diffusivity, mm2/s 7.2
4.4
Thermal Shock Resistance, points 28
23

Alloy Composition

Carbon (C), % 0.2 to 0.4
0 to 0.025
Chromium (Cr), % 11.5 to 14
24.5 to 26
Iron (Fe), % 81.6 to 88.3
61.5 to 68.5
Manganese (Mn), % 0 to 1.0
0 to 1.0
Molybdenum (Mo), % 0 to 0.5
3.5 to 4.5
Nickel (Ni), % 0 to 1.0
3.5 to 4.5
Niobium (Nb), % 0
0.2 to 0.8
Nitrogen (N), % 0
0 to 0.035
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.5
0 to 0.75
Sulfur (S), % 0.2 to 0.4
0 to 0.030
Titanium (Ti), % 0
0.2 to 0.8