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ACI-ASTM CF20 Steel vs. SAE-AISI 1141 Steel

Both ACI-ASTM CF20 steel and SAE-AISI 1141 steel are iron alloys. They have 70% 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 ACI-ASTM CF20 steel and the bottom bar is SAE-AISI 1141 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160
210 to 220
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 50
11 to 17
Fatigue Strength, MPa 240
270 to 430
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
72
Tensile Strength: Ultimate (UTS), MPa 530
740 to 810
Tensile Strength: Yield (Proof), MPa 250
400 to 700

Thermal Properties

Latent Heat of Fusion, J/g 300
250
Maximum Temperature: Mechanical, °C 970
400
Melting Completion (Liquidus), °C 1420
1460
Melting Onset (Solidus), °C 1410
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 16
51
Thermal Expansion, µm/m-K 17
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
10
Electrical Conductivity: Equal Weight (Specific), % IACS 2.3
12

Otherwise Unclassified Properties

Base Metal Price, % relative 16
1.9
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 3.1
1.4
Embodied Energy, MJ/kg 44
19
Embodied Water, L/kg 150
47

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 220
86 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 160
430 to 1290
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 19
26 to 29
Strength to Weight: Bending, points 19
23 to 25
Thermal Diffusivity, mm2/s 4.3
14
Thermal Shock Resistance, points 11
24 to 26

Alloy Composition

Carbon (C), % 0 to 0.2
0.37 to 0.45
Chromium (Cr), % 18 to 21
0
Iron (Fe), % 64.2 to 74
97.7 to 98.2
Manganese (Mn), % 0 to 1.5
1.4 to 1.7
Nickel (Ni), % 8.0 to 11
0
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 2.0
0
Sulfur (S), % 0 to 0.040
0.080 to 0.13