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ASTM A387 Grade 21 Steel vs. EN 1.1118 Cast Steel

Both ASTM A387 grade 21 steel and EN 1.1118 cast steel are iron alloys. They have a very high 96% of their average alloy composition in common. There are 29 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is ASTM A387 grade 21 steel and the bottom bar is EN 1.1118 cast steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 21
14 to 21
Fatigue Strength, MPa 160 to 250
320 to 400
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 74
73
Tensile Strength: Ultimate (UTS), MPa 500 to 590
700 to 750
Tensile Strength: Yield (Proof), MPa 230 to 350
460 to 630

Thermal Properties

Latent Heat of Fusion, J/g 260
250
Maximum Temperature: Mechanical, °C 480
400
Melting Completion (Liquidus), °C 1470
1460
Melting Onset (Solidus), °C 1430
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 41
51
Thermal Expansion, µm/m-K 13
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.6
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 8.8
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 4.1
1.9
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 1.8
1.4
Embodied Energy, MJ/kg 23
19
Embodied Water, L/kg 62
48

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 84 to 110
97 to 130
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 320
550 to 1050
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 18 to 21
25 to 27
Strength to Weight: Bending, points 18 to 20
22 to 23
Thermal Diffusivity, mm2/s 11
14
Thermal Shock Resistance, points 14 to 17
22 to 24

Alloy Composition

Carbon (C), % 0.050 to 0.15
0.2 to 0.25
Chromium (Cr), % 2.8 to 3.3
0
Iron (Fe), % 94.4 to 96
97.3 to 98.3
Manganese (Mn), % 0.3 to 0.6
1.5 to 1.8
Molybdenum (Mo), % 0.9 to 1.1
0
Phosphorus (P), % 0 to 0.025
0 to 0.020
Silicon (Si), % 0 to 0.5
0 to 0.6
Sulfur (S), % 0 to 0.025
0 to 0.015