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ASTM A387 Grade 12 Steel vs. EN 1.7039 Steel

Both ASTM A387 grade 12 steel and EN 1.7039 steel are iron alloys. Their average alloy composition is basically identical. There are 24 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is ASTM A387 grade 12 steel and the bottom bar is EN 1.7039 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Tensile Strength: Ultimate (UTS), MPa 470 to 520
530 to 1850

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 430
420
Melting Completion (Liquidus), °C 1470
1460
Melting Onset (Solidus), °C 1420
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 44
46
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 2.8
2.3
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.6
1.4
Embodied Energy, MJ/kg 21
19
Embodied Water, L/kg 51
51

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 16 to 18
19 to 65
Strength to Weight: Bending, points 17 to 18
19 to 43
Thermal Diffusivity, mm2/s 12
12
Thermal Shock Resistance, points 14 to 15
16 to 54

Alloy Composition

Carbon (C), % 0.050 to 0.17
0.38 to 0.45
Chromium (Cr), % 0.8 to 1.2
0.9 to 1.2
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 97 to 98.2
96.8 to 98.1
Manganese (Mn), % 0.4 to 0.65
0.6 to 0.9
Molybdenum (Mo), % 0.45 to 0.6
0
Phosphorus (P), % 0 to 0.025
0 to 0.025
Silicon (Si), % 0.15 to 0.4
0 to 0.3
Sulfur (S), % 0 to 0.025
0.020 to 0.040