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ACI-ASTM CF20 Steel vs. AWS E385

Both ACI-ASTM CF20 steel and AWS E385 are iron alloys. They have 76% of their average alloy composition in common. There are 25 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is ACI-ASTM CF20 steel and the bottom bar is AWS E385.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 50
34
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
79
Tensile Strength: Ultimate (UTS), MPa 530
580

Thermal Properties

Latent Heat of Fusion, J/g 300
300
Melting Completion (Liquidus), °C 1420
1440
Melting Onset (Solidus), °C 1410
1390
Specific Heat Capacity, J/kg-K 480
460
Thermal Conductivity, W/m-K 16
14
Thermal Expansion, µm/m-K 17
14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 2.3
1.9

Otherwise Unclassified Properties

Base Metal Price, % relative 16
31
Density, g/cm3 7.8
8.1
Embodied Carbon, kg CO2/kg material 3.1
5.8
Embodied Energy, MJ/kg 44
79
Embodied Water, L/kg 150
200

Common Calculations

PREN (Pitting Resistance) 20
36
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 19
20
Strength to Weight: Bending, points 19
19
Thermal Diffusivity, mm2/s 4.3
3.6
Thermal Shock Resistance, points 11
15

Alloy Composition

Carbon (C), % 0 to 0.2
0 to 0.030
Chromium (Cr), % 18 to 21
19.5 to 21.5
Copper (Cu), % 0
1.2 to 2.0
Iron (Fe), % 64.2 to 74
41.8 to 50.1
Manganese (Mn), % 0 to 1.5
1.0 to 2.5
Molybdenum (Mo), % 0
4.2 to 5.2
Nickel (Ni), % 8.0 to 11
24 to 26
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 0 to 2.0
0 to 0.9
Sulfur (S), % 0 to 0.040
0 to 0.020