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EN 1.1221 Steel vs. Grey Cast Iron

Both EN 1.1221 steel and grey cast iron are iron alloys. They have a moderately high 94% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is EN 1.1221 steel and the bottom bar is grey cast iron.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210 to 250
160 to 300
Elastic (Young's, Tensile) Modulus, GPa 190
180
Elongation at Break, % 10 to 21
9.6
Fatigue Strength, MPa 240 to 340
69 to 170
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 72
69
Shear Strength, MPa 450 to 520
180 to 610
Tensile Strength: Ultimate (UTS), MPa 730 to 870
160 to 450
Tensile Strength: Yield (Proof), MPa 390 to 550
98 to 290

Thermal Properties

Latent Heat of Fusion, J/g 250
280
Melting Completion (Liquidus), °C 1460
1380
Melting Onset (Solidus), °C 1410
1180
Specific Heat Capacity, J/kg-K 470
490
Thermal Conductivity, W/m-K 48
46
Thermal Expansion, µm/m-K 12
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
8.9

Otherwise Unclassified Properties

Base Metal Price, % relative 2.1
1.9
Density, g/cm3 7.8
7.5
Embodied Carbon, kg CO2/kg material 1.5
1.5
Embodied Energy, MJ/kg 19
21
Embodied Water, L/kg 47
44

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 67 to 130
13 to 37
Resilience: Unit (Modulus of Resilience), kJ/m3 410 to 800
27 to 240
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 26 to 31
5.8 to 17
Strength to Weight: Bending, points 23 to 26
8.7 to 17
Thermal Diffusivity, mm2/s 13
13
Thermal Shock Resistance, points 23 to 28
6.0 to 17

Alloy Composition

Carbon (C), % 0.57 to 0.65
3.1 to 3.4
Chromium (Cr), % 0 to 0.4
0
Iron (Fe), % 97.1 to 98.8
92.1 to 93.9
Manganese (Mn), % 0.6 to 0.9
0.5 to 0.7
Molybdenum (Mo), % 0 to 0.1
0
Nickel (Ni), % 0 to 0.4
0
Phosphorus (P), % 0 to 0.035
0 to 0.9
Silicon (Si), % 0 to 0.4
2.5 to 2.8
Sulfur (S), % 0 to 0.035
0 to 0.15