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AWS E318 vs. Grey Cast Iron

Both AWS E318 and grey cast iron are iron alloys. They have 65% 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 grey cast iron.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
180
Elongation at Break, % 29
9.6
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 78
69
Tensile Strength: Ultimate (UTS), MPa 620
160 to 450

Thermal Properties

Latent Heat of Fusion, J/g 290
280
Melting Completion (Liquidus), °C 1440
1380
Melting Onset (Solidus), °C 1400
1180
Specific Heat Capacity, J/kg-K 470
490
Thermal Conductivity, W/m-K 15
46
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
8.9

Otherwise Unclassified Properties

Base Metal Price, % relative 23
1.9
Density, g/cm3 7.9
7.5
Embodied Carbon, kg CO2/kg material 4.4
1.5
Embodied Energy, MJ/kg 62
21
Embodied Water, L/kg 160
44

Common Calculations

Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 22
5.8 to 17
Strength to Weight: Bending, points 20
8.7 to 17
Thermal Diffusivity, mm2/s 4.0
13
Thermal Shock Resistance, points 16
6.0 to 17

Alloy Composition

Carbon (C), % 0 to 0.080
3.1 to 3.4
Chromium (Cr), % 17 to 20
0
Copper (Cu), % 0 to 0.75
0
Iron (Fe), % 57.6 to 69.5
92.1 to 93.9
Manganese (Mn), % 0.5 to 2.5
0.5 to 0.7
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 0.9
Silicon (Si), % 0 to 1.0
2.5 to 2.8
Sulfur (S), % 0 to 0.030
0 to 0.15