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SAE-AISI 1049 Steel vs. ACI-ASTM CA40 Steel

Both SAE-AISI 1049 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 1049 steel and the bottom bar is ACI-ASTM CA40 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200 to 220
310
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 11 to 17
10
Fatigue Strength, MPa 250 to 400
460
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 72
76
Tensile Strength: Ultimate (UTS), MPa 680 to 750
910
Tensile Strength: Yield (Proof), MPa 370 to 640
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 8.1
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 75 to 99
89
Resilience: Unit (Modulus of Resilience), kJ/m3 370 to 1090
1910
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 24 to 27
33
Strength to Weight: Bending, points 22 to 23
27
Thermal Diffusivity, mm2/s 14
6.7
Thermal Shock Resistance, points 22 to 24
33

Alloy Composition

Carbon (C), % 0.46 to 0.53
0.2 to 0.4
Chromium (Cr), % 0
11.5 to 14
Iron (Fe), % 98.5 to 98.9
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