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Grey Cast Iron vs. ASTM A36 Carbon Steel

Both grey cast iron and ASTM A36 carbon steel are iron alloys. They have a moderately high 93% of their average alloy composition in common. There are 26 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is grey cast iron and the bottom bar is ASTM A36 carbon steel.

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 180
190
Elongation at Break, % 0.52
22
Fatigue Strength, MPa 69 to 170
200
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 69
73
Shear Strength, MPa 180 to 610
300
Tensile Strength: Ultimate (UTS), MPa 160 to 450
480
Tensile Strength: Yield (Proof), MPa 98 to 280
290

Thermal Properties

Melting Completion (Liquidus), °C 1380
1460
Melting Onset (Solidus), °C 1180
1420
Specific Heat Capacity, J/kg-K 490
470
Thermal Conductivity, W/m-K 46
50
Thermal Expansion, µm/m-K 11
11

Otherwise Unclassified Properties

Base Metal Price, % relative 1.9
1.7
Density, g/cm3 7.5
7.9
Embodied Carbon, kg CO2/kg material 1.5
1.4
Embodied Energy, MJ/kg 21
18
Embodied Water, L/kg 44
44

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 0.72 to 2.0
92
Resilience: Unit (Modulus of Resilience), kJ/m3 27 to 210
220
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 5.8 to 17
17
Strength to Weight: Bending, points 8.7 to 17
17
Thermal Diffusivity, m2/s 13
14
Thermal Shock Resistance, points 6.0 to 17
16

Alloy Composition

Carbon (C), % 3.1 to 3.4
0 to 0.26
Iron (Fe), % 92.1 to 93.9
99.25 to 100
Manganese (Mn), % 0.5 to 0.7
0
Phosphorus (P), % 0 to 0.9
0 to 0.040
Silicon (Si), % 2.5 to 2.8
0 to 0.4
Sulfur (S), % 0 to 0.15
0 to 0.050