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ASTM A387 Grade 21L Class 1 vs. EN 1.8505 Steel

Both ASTM A387 grade 21L class 1 and EN 1.8505 steel are iron alloys. They have a very high 98% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is ASTM A387 grade 21L class 1 and the bottom bar is EN 1.8505 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150
320
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 21
13
Fatigue Strength, MPa 160
540
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 74
73
Shear Strength, MPa 310
630
Tensile Strength: Ultimate (UTS), MPa 500
1050
Tensile Strength: Yield (Proof), MPa 230
860

Thermal Properties

Latent Heat of Fusion, J/g 260
250
Maximum Temperature: Mechanical, °C 480
440
Melting Completion (Liquidus), °C 1470
1450
Melting Onset (Solidus), °C 1430
1410
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 41
39
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.6
7.5
Electrical Conductivity: Equal Weight (Specific), % IACS 8.8
8.7

Otherwise Unclassified Properties

Base Metal Price, % relative 4.1
2.8
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 1.8
1.6
Embodied Energy, MJ/kg 23
22
Embodied Water, L/kg 62
65

Common Calculations

PREN (Pitting Resistance) 6.4
2.6
Resilience: Ultimate (Unit Rupture Work), MJ/m3 84
120
Resilience: Unit (Modulus of Resilience), kJ/m3 140
1950
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 18
37
Strength to Weight: Bending, points 18
30
Thermal Diffusivity, mm2/s 11
11
Thermal Shock Resistance, points 14
31

Alloy Composition

Aluminum (Al), % 0
0.8 to 1.2
Carbon (C), % 0 to 0.1
0.28 to 0.35
Chromium (Cr), % 2.8 to 3.3
1.5 to 1.8
Iron (Fe), % 94.4 to 96.1
95.4 to 97.1
Manganese (Mn), % 0.3 to 0.6
0.4 to 0.7
Molybdenum (Mo), % 0.9 to 1.1
0.2 to 0.4
Phosphorus (P), % 0 to 0.025
0 to 0.025
Silicon (Si), % 0 to 0.5
0 to 0.4
Sulfur (S), % 0 to 0.025
0 to 0.035