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SAE-AISI 1140 Steel vs. ACI-ASTM CA15 Steel

Both SAE-AISI 1140 steel and ACI-ASTM CA15 steel are iron alloys. They have 86% of their average alloy composition in common. There are 31 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 SAE-AISI 1140 steel and the bottom bar is ACI-ASTM CA15 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170 to 180
220
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 14 to 18
21
Fatigue Strength, MPa 230 to 370
370
Poisson's Ratio 0.29
0.28
Reduction in Area, % 39 to 46
34
Shear Modulus, GPa 72
76
Tensile Strength: Ultimate (UTS), MPa 600 to 700
700
Tensile Strength: Yield (Proof), MPa 340 to 570
570

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 13
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 89 to 93
140
Resilience: Unit (Modulus of Resilience), kJ/m3 310 to 870
820
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 21 to 25
25
Strength to Weight: Bending, points 20 to 22
23
Thermal Diffusivity, mm2/s 14
6.7
Thermal Shock Resistance, points 18 to 21
26

Alloy Composition

Carbon (C), % 0.37 to 0.44
0 to 0.15
Chromium (Cr), % 0
11.5 to 14
Iron (Fe), % 98.4 to 98.9
81.8 to 88.5
Manganese (Mn), % 0.7 to 1.0
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), % 0.080 to 0.13
0 to 0.040