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SAE-AISI 1040 Steel vs. ACI-ASTM CA40 Steel

Both SAE-AISI 1040 steel and ACI-ASTM CA40 steel are iron alloys. They have 86% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI 1040 steel and the bottom bar is ACI-ASTM CA40 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160 to 180
310
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 13 to 20
10
Fatigue Strength, MPa 220 to 340
460
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
76
Tensile Strength: Ultimate (UTS), MPa 570 to 640
910
Tensile Strength: Yield (Proof), MPa 320 to 530
860

Thermal Properties

Latent Heat of Fusion, J/g 250
280
Maximum Temperature: Mechanical, °C 400
750
Melting Completion (Liquidus), °C 1460
1440
Melting Onset (Solidus), °C 1420
1500
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 51
25
Thermal Expansion, µm/m-K 12
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.0
3.0
Electrical Conductivity: Equal Weight (Specific), % IACS 8.0
3.5

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
7.5
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 1.4
2.0
Embodied Energy, MJ/kg 18
28
Embodied Water, L/kg 46
100

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 79 to 96
89
Resilience: Unit (Modulus of Resilience), kJ/m3 270 to 760
1910
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 20 to 23
33
Strength to Weight: Bending, points 19 to 21
27
Thermal Diffusivity, mm2/s 14
6.7
Thermal Shock Resistance, points 18 to 20
33

Alloy Composition

Carbon (C), % 0.37 to 0.44
0.2 to 0.4
Chromium (Cr), % 0
11.5 to 14
Iron (Fe), % 98.6 to 99.03
81.5 to 88.3
Manganese (Mn), % 0.6 to 0.9
0 to 1.0
Molybdenum (Mo), % 0
0 to 0.5
Nickel (Ni), % 0
0 to 1.0
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0
0 to 1.5
Sulfur (S), % 0 to 0.050
0 to 0.040