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AWS E430 vs. ACI-ASTM CK20 Steel

Both AWS E430 and ACI-ASTM CK20 steel are iron alloys. They have 70% 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 AWS E430 and the bottom bar is ACI-ASTM CK20 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 23
37
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
78
Tensile Strength: Ultimate (UTS), MPa 500
530

Thermal Properties

Latent Heat of Fusion, J/g 280
310
Melting Completion (Liquidus), °C 1440
1400
Melting Onset (Solidus), °C 1400
1430
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 25
14
Thermal Expansion, µm/m-K 14
15

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.8
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 3.2
2.3

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
25
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.2
4.4
Embodied Energy, MJ/kg 31
62
Embodied Water, L/kg 120
190

Common Calculations

PREN (Pitting Resistance) 18
26
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 18
19
Strength to Weight: Bending, points 18
19
Thermal Diffusivity, mm2/s 6.7
3.7
Thermal Shock Resistance, points 13
13

Alloy Composition

Carbon (C), % 0 to 0.1
0 to 0.2
Chromium (Cr), % 15 to 18
23 to 27
Copper (Cu), % 0 to 0.75
0
Iron (Fe), % 77.8 to 85
46.7 to 58
Manganese (Mn), % 0 to 1.0
0 to 2.0
Molybdenum (Mo), % 0 to 0.75
0 to 0.5
Nickel (Ni), % 0 to 0.6
19 to 22
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 0.9
0 to 2.0
Sulfur (S), % 0 to 0.030
0 to 0.040