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

Both EN 1.8505 steel and ASTM A387 grade 21L class 1 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 EN 1.8505 steel and the bottom bar is ASTM A387 grade 21L class 1.

Metric UnitsUS Customary Units

Mechanical Properties

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

Thermal Properties

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

Electrical Properties

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

Otherwise Unclassified Properties

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

Common Calculations

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

Alloy Composition

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