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ACI-ASTM CK20 Steel vs. AWS E309

Both ACI-ASTM CK20 steel and AWS E309 are iron alloys. They have a moderately high 91% 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 CK20 steel and the bottom bar is AWS E309.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 37
34
Poisson's Ratio 0.28
0.27
Shear Modulus, GPa 78
78
Tensile Strength: Ultimate (UTS), MPa 530
620

Thermal Properties

Latent Heat of Fusion, J/g 310
300
Melting Completion (Liquidus), °C 1400
1410
Melting Onset (Solidus), °C 1430
1370
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 14
15
Thermal Expansion, µm/m-K 15
14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
2.1
Electrical Conductivity: Equal Weight (Specific), % IACS 2.3
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 25
20
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 4.4
3.7
Embodied Energy, MJ/kg 62
52
Embodied Water, L/kg 190
180

Common Calculations

PREN (Pitting Resistance) 26
25
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 19
22
Strength to Weight: Bending, points 19
21
Thermal Diffusivity, mm2/s 3.7
4.0
Thermal Shock Resistance, points 13
16

Alloy Composition

Carbon (C), % 0 to 0.2
0 to 0.15
Chromium (Cr), % 23 to 27
22 to 25
Copper (Cu), % 0
0 to 0.75
Iron (Fe), % 46.7 to 58
55.8 to 65.5
Manganese (Mn), % 0 to 2.0
0.5 to 2.5
Molybdenum (Mo), % 0 to 0.5
0 to 0.75
Nickel (Ni), % 19 to 22
12 to 14
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 2.0
0 to 1.0
Sulfur (S), % 0 to 0.040
0 to 0.030