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AWS E318 vs. Ductile Cast Iron

Both AWS E318 and ductile cast iron are iron alloys. They have 64% of their average alloy composition in common. There are 24 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is AWS E318 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, % 29
2.1 to 20
Poisson's Ratio 0.28
0.28 to 0.31
Shear Modulus, GPa 78
64 to 70
Tensile Strength: Ultimate (UTS), MPa 620
460 to 920

Thermal Properties

Latent Heat of Fusion, J/g 290
270
Melting Completion (Liquidus), °C 1440
1160
Melting Onset (Solidus), °C 1400
1120
Specific Heat Capacity, J/kg-K 470
490
Thermal Conductivity, W/m-K 15
31 to 36
Thermal Expansion, µm/m-K 14
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.6
8.8 to 9.4

Otherwise Unclassified Properties

Base Metal Price, % relative 23
1.9
Density, g/cm3 7.9
7.1 to 7.5
Embodied Carbon, kg CO2/kg material 4.4
1.5
Embodied Energy, MJ/kg 62
21
Embodied Water, L/kg 160
43

Common Calculations

Stiffness to Weight: Axial, points 14
12 to 14
Stiffness to Weight: Bending, points 25
24 to 26
Strength to Weight: Axial, points 22
17 to 35
Strength to Weight: Bending, points 20
18 to 29
Thermal Diffusivity, mm2/s 4.0
8.9 to 10
Thermal Shock Resistance, points 16
17 to 35

Alloy Composition

Carbon (C), % 0 to 0.080
3.0 to 3.5
Chromium (Cr), % 17 to 20
0
Copper (Cu), % 0 to 0.75
0
Iron (Fe), % 57.6 to 69.5
93.7 to 95.5
Manganese (Mn), % 0.5 to 2.5
0
Molybdenum (Mo), % 2.0 to 3.0
0
Nickel (Ni), % 11 to 14
0
Niobium (Nb), % 0 to 1.0
0
Phosphorus (P), % 0 to 0.040
0 to 0.080
Silicon (Si), % 0 to 1.0
1.5 to 2.8
Sulfur (S), % 0 to 0.030
0