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AWS E320 vs. Ductile Cast Iron

Both AWS E320 and ductile cast iron are iron alloys. They have a modest 38% of their average alloy composition in common, which, by itself, doesn't mean much. There are 20 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

For each property being compared, the top bar is AWS E320 and the bottom bar is ductile cast iron.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
170 to 180
Elongation at Break, % 34
2.1 to 20
Poisson's Ratio 0.28
0.28 to 0.31
Shear Modulus, GPa 77
64 to 70
Tensile Strength: Ultimate (UTS), MPa 620
460 to 920

Thermal Properties

Latent Heat of Fusion, J/g 300
270
Melting Completion (Liquidus), °C 1410
1160
Melting Onset (Solidus), °C 1360
1120
Specific Heat Capacity, J/kg-K 460
490
Thermal Expansion, µm/m-K 14
11

Otherwise Unclassified Properties

Base Metal Price, % relative 38
1.9
Density, g/cm3 8.2
7.1 to 7.5
Embodied Carbon, kg CO2/kg material 6.5
1.5
Embodied Energy, MJ/kg 91
21
Embodied Water, L/kg 220
43

Common Calculations

Stiffness to Weight: Axial, points 13
12 to 14
Stiffness to Weight: Bending, points 24
24 to 26
Strength to Weight: Axial, points 21
17 to 35
Strength to Weight: Bending, points 20
18 to 29
Thermal Shock Resistance, points 16
17 to 35

Alloy Composition

Carbon (C), % 0 to 0.070
3.0 to 3.5
Chromium (Cr), % 19 to 21
0
Copper (Cu), % 3.0 to 4.0
0
Iron (Fe), % 31.8 to 43.5
93.7 to 95.5
Manganese (Mn), % 0.5 to 2.5
0
Molybdenum (Mo), % 2.0 to 3.0
0
Nickel (Ni), % 32 to 36
0
Niobium (Nb), % 0 to 1.0
0
Phosphorus (P), % 0 to 0.040
0 to 0.080
Silicon (Si), % 0 to 0.6
1.5 to 2.8
Sulfur (S), % 0 to 0.030
0