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ASTM A387 Grade 21L Class 1 vs. EN 1.0303 Steel

Both ASTM A387 grade 21L class 1 and EN 1.0303 steel are iron alloys. They have a very high 96% of their average alloy composition in common. There are 31 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 ASTM A387 grade 21L class 1 and the bottom bar is EN 1.0303 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150
84 to 120
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 21
12 to 25
Fatigue Strength, MPa 160
150 to 230
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 74
73
Shear Strength, MPa 310
220 to 260
Tensile Strength: Ultimate (UTS), MPa 500
290 to 410
Tensile Strength: Yield (Proof), MPa 230
200 to 320

Thermal Properties

Latent Heat of Fusion, J/g 260
250
Maximum Temperature: Mechanical, °C 480
400
Melting Completion (Liquidus), °C 1470
1470
Melting Onset (Solidus), °C 1430
1430
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 41
53
Thermal Expansion, µm/m-K 13
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.6
6.9
Electrical Conductivity: Equal Weight (Specific), % IACS 8.8
7.9

Otherwise Unclassified Properties

Base Metal Price, % relative 4.1
1.8
Density, g/cm3 7.9
7.9
Embodied Carbon, kg CO2/kg material 1.8
1.4
Embodied Energy, MJ/kg 23
18
Embodied Water, L/kg 62
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 84
30 to 94
Resilience: Unit (Modulus of Resilience), kJ/m3 140
110 to 270
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 18
10 to 15
Strength to Weight: Bending, points 18
12 to 16
Thermal Diffusivity, mm2/s 11
14
Thermal Shock Resistance, points 14
9.2 to 13

Alloy Composition

Aluminum (Al), % 0
0.020 to 0.060
Carbon (C), % 0 to 0.1
0.020 to 0.060
Chromium (Cr), % 2.8 to 3.3
0
Iron (Fe), % 94.4 to 96.1
99.335 to 99.71
Manganese (Mn), % 0.3 to 0.6
0.25 to 0.4
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 0.1
Sulfur (S), % 0 to 0.025
0 to 0.025