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ASTM A387 Grade 12 Steel vs. EN 1.8503 Steel

Both ASTM A387 grade 12 steel and EN 1.8503 steel are iron alloys. Their average alloy composition is basically identical. 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 12 steel and the bottom bar is EN 1.8503 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 140 to 160
300
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 25
16
Fatigue Strength, MPa 190 to 230
600
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Shear Strength, MPa 300 to 330
610
Tensile Strength: Ultimate (UTS), MPa 470 to 520
1000
Tensile Strength: Yield (Proof), MPa 260 to 310
910

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 430
440
Melting Completion (Liquidus), °C 1470
1470
Melting Onset (Solidus), °C 1420
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 44
41
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
8.5

Otherwise Unclassified Properties

Base Metal Price, % relative 2.8
3.3
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.6
2.3
Embodied Energy, MJ/kg 21
33
Embodied Water, L/kg 51
57

Common Calculations

PREN (Pitting Resistance) 2.7
3.7
Resilience: Ultimate (Unit Rupture Work), MJ/m3 98 to 110
150
Resilience: Unit (Modulus of Resilience), kJ/m3 180 to 250
2200
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 16 to 18
35
Strength to Weight: Bending, points 17 to 18
28
Thermal Diffusivity, mm2/s 12
11
Thermal Shock Resistance, points 14 to 15
29

Alloy Composition

Aluminum (Al), % 0
0 to 0.3
Carbon (C), % 0.050 to 0.17
0.16 to 0.24
Chromium (Cr), % 0.8 to 1.2
1.2 to 1.5
Iron (Fe), % 97 to 98.2
95.8 to 97.5
Manganese (Mn), % 0.4 to 0.65
0.4 to 0.8
Molybdenum (Mo), % 0.45 to 0.6
0.65 to 0.8
Phosphorus (P), % 0 to 0.025
0 to 0.025
Silicon (Si), % 0.15 to 0.4
0 to 0.4
Sulfur (S), % 0 to 0.025
0 to 0.035
Vanadium (V), % 0
0.25 to 0.35