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ASTM A387 Grade 11 Steel vs. EN 1.7221 Steel

Both ASTM A387 grade 11 steel and EN 1.7221 steel are iron alloys. Their average alloy composition is basically identical. There are 30 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 11 steel and the bottom bar is EN 1.7221 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150 to 180
200 to 230
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 25
11 to 17
Fatigue Strength, MPa 200 to 250
290 to 390
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Tensile Strength: Ultimate (UTS), MPa 500 to 600
650 to 780
Tensile Strength: Yield (Proof), MPa 270 to 350
430 to 630

Thermal Properties

Latent Heat of Fusion, J/g 260
250
Maximum Temperature: Mechanical, °C 430
420
Melting Completion (Liquidus), °C 1460
1460
Melting Onset (Solidus), °C 1420
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 39
44
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 8.5
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 2.9
2.4
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.6
1.5
Embodied Energy, MJ/kg 21
20
Embodied Water, L/kg 53
51

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 100 to 130
83 to 98
Resilience: Unit (Modulus of Resilience), kJ/m3 200 to 320
490 to 1050
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 18 to 21
23 to 27
Strength to Weight: Bending, points 18 to 20
21 to 24
Thermal Diffusivity, mm2/s 11
12
Thermal Shock Resistance, points 15 to 18
19 to 23

Alloy Composition

Carbon (C), % 0.050 to 0.17
0.22 to 0.29
Chromium (Cr), % 1.0 to 1.5
0.8 to 1.2
Iron (Fe), % 96.2 to 97.6
96.8 to 98.3
Manganese (Mn), % 0.4 to 0.65
0.5 to 0.8
Molybdenum (Mo), % 0.45 to 0.65
0.15 to 0.3
Phosphorus (P), % 0 to 0.025
0 to 0.025
Silicon (Si), % 0.5 to 0.8
0 to 0.6
Sulfur (S), % 0 to 0.025
0 to 0.030

Comparable Variants