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ASTM A387 Grade 21 Steel vs. EN 1.3505 Steel

Both ASTM A387 grade 21 steel and EN 1.3505 steel are iron alloys. They have a very high 97% of their average alloy composition in common. There are 25 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is ASTM A387 grade 21 steel and the bottom bar is EN 1.3505 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150 to 180
180 to 210
Elastic (Young's, Tensile) Modulus, GPa 190
190
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 74
72
Tensile Strength: Ultimate (UTS), MPa 500 to 590
600 to 690

Thermal Properties

Latent Heat of Fusion, J/g 260
250
Maximum Temperature: Mechanical, °C 480
430
Melting Completion (Liquidus), °C 1470
1450
Melting Onset (Solidus), °C 1430
1410
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 41
45
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.6
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 8.8
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 4.1
2.4
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 1.8
1.5
Embodied Energy, MJ/kg 23
20
Embodied Water, L/kg 62
52

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 18 to 21
22 to 25
Strength to Weight: Bending, points 18 to 20
20 to 22
Thermal Diffusivity, mm2/s 11
12
Thermal Shock Resistance, points 14 to 17
18 to 20

Alloy Composition

Aluminum (Al), % 0
0 to 0.050
Carbon (C), % 0.050 to 0.15
0.93 to 1.1
Chromium (Cr), % 2.8 to 3.3
1.4 to 1.6
Copper (Cu), % 0
0 to 0.3
Iron (Fe), % 94.4 to 96
97.1 to 98.3
Manganese (Mn), % 0.3 to 0.6
0.25 to 0.45
Molybdenum (Mo), % 0.9 to 1.1
0 to 0.1
Oxygen (O), % 0
0 to 0.0015
Phosphorus (P), % 0 to 0.025
0 to 0.025
Silicon (Si), % 0 to 0.5
0.15 to 0.35
Sulfur (S), % 0 to 0.025
0 to 0.030