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SAE-AISI 1090 Steel vs. ACI-ASTM CA40F Steel

Both SAE-AISI 1090 steel and ACI-ASTM CA40F 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 1090 steel and the bottom bar is ACI-ASTM CA40F steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 220 to 280
230
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 11
13
Fatigue Strength, MPa 320 to 380
320
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 72
76
Tensile Strength: Ultimate (UTS), MPa 790 to 950
770
Tensile Strength: Yield (Proof), MPa 520 to 610
550

Thermal Properties

Latent Heat of Fusion, J/g 240
280
Maximum Temperature: Mechanical, °C 400
750
Melting Completion (Liquidus), °C 1450
1430
Melting Onset (Solidus), °C 1410
1390
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 50
27
Thermal Expansion, µm/m-K 12
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.1
3.0
Electrical Conductivity: Equal Weight (Specific), % IACS 8.2
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 19
28
Embodied Water, L/kg 46
100

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 82 to 91
94
Resilience: Unit (Modulus of Resilience), kJ/m3 730 to 1000
790
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 28 to 34
28
Strength to Weight: Bending, points 24 to 27
24
Thermal Diffusivity, mm2/s 13
7.2
Thermal Shock Resistance, points 25 to 31
28

Alloy Composition

Carbon (C), % 0.85 to 1.0
0.2 to 0.4
Chromium (Cr), % 0
11.5 to 14
Iron (Fe), % 98 to 98.6
81.6 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
0.2 to 0.4