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ASTM A387 Grade 21L Class 1 vs. EN 1.7386 Steel

Both ASTM A387 grade 21L class 1 and EN 1.7386 steel are iron alloys. They have a moderately high 93% 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 1.7386 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150
170 to 200
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 21
18 to 21
Fatigue Strength, MPa 160
170 to 290
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 74
75
Shear Strength, MPa 310
340 to 410
Tensile Strength: Ultimate (UTS), MPa 500
550 to 670
Tensile Strength: Yield (Proof), MPa 230
240 to 440

Thermal Properties

Latent Heat of Fusion, J/g 260
270
Maximum Temperature: Mechanical, °C 480
600
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
26
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.6
9.0
Electrical Conductivity: Equal Weight (Specific), % IACS 8.8
10

Otherwise Unclassified Properties

Base Metal Price, % relative 4.1
6.5
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 1.8
2.0
Embodied Energy, MJ/kg 23
28
Embodied Water, L/kg 62
88

Common Calculations

PREN (Pitting Resistance) 6.4
12
Resilience: Ultimate (Unit Rupture Work), MJ/m3 84
92 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 140
150 to 490
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 18
20 to 24
Strength to Weight: Bending, points 18
19 to 22
Thermal Diffusivity, mm2/s 11
6.9
Thermal Shock Resistance, points 14
15 to 18

Alloy Composition

Aluminum (Al), % 0
0 to 0.040
Carbon (C), % 0 to 0.1
0.080 to 0.15
Chromium (Cr), % 2.8 to 3.3
8.0 to 10
Copper (Cu), % 0
0 to 0.3
Iron (Fe), % 94.4 to 96.1
86.8 to 90.5
Manganese (Mn), % 0.3 to 0.6
0.3 to 0.6
Molybdenum (Mo), % 0.9 to 1.1
0.9 to 1.1
Phosphorus (P), % 0 to 0.025
0 to 0.025
Silicon (Si), % 0 to 0.5
0.25 to 1.0
Sulfur (S), % 0 to 0.025
0 to 0.010