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ASTM A387 Grade 21L Class 1 vs. EN 1.7366 Steel

Both ASTM A387 grade 21L class 1 and EN 1.7366 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 1.7366 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150
140 to 210
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 21
17 to 19
Fatigue Strength, MPa 160
160 to 320
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 74
74
Shear Strength, MPa 310
290 to 440
Tensile Strength: Ultimate (UTS), MPa 500
460 to 710
Tensile Strength: Yield (Proof), MPa 230
230 to 480

Thermal Properties

Latent Heat of Fusion, J/g 260
260
Maximum Temperature: Mechanical, °C 480
510
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
40
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.6
8.1
Electrical Conductivity: Equal Weight (Specific), % IACS 8.8
9.3

Otherwise Unclassified Properties

Base Metal Price, % relative 4.1
4.3
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 1.8
1.7
Embodied Energy, MJ/kg 23
23
Embodied Water, L/kg 62
69

Common Calculations

PREN (Pitting Resistance) 6.4
6.8
Resilience: Ultimate (Unit Rupture Work), MJ/m3 84
74 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 140
140 to 600
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 18
16 to 25
Strength to Weight: Bending, points 18
17 to 23
Thermal Diffusivity, mm2/s 11
11
Thermal Shock Resistance, points 14
13 to 20

Alloy Composition

Carbon (C), % 0 to 0.1
0 to 0.18
Chromium (Cr), % 2.8 to 3.3
4.0 to 6.0
Iron (Fe), % 94.4 to 96.1
91.9 to 95.3
Manganese (Mn), % 0.3 to 0.6
0.3 to 0.8
Molybdenum (Mo), % 0.9 to 1.1
0.45 to 0.65
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 0.015