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ASTM A387 Grade 12 Steel vs. EN 1.8550 Steel

Both ASTM A387 grade 12 steel and EN 1.8550 steel are iron alloys. They have a very high 97% 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 12 steel and the bottom bar is EN 1.8550 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
11
Fatigue Strength, MPa 190 to 230
470
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Shear Strength, MPa 300 to 330
600
Tensile Strength: Ultimate (UTS), MPa 470 to 520
1000
Tensile Strength: Yield (Proof), MPa 260 to 310
760

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 430
440
Melting Completion (Liquidus), °C 1470
1450
Melting Onset (Solidus), °C 1420
1410
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 44
40
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
7.6
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
8.8

Otherwise Unclassified Properties

Base Metal Price, % relative 2.8
3.4
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.6
1.7
Embodied Energy, MJ/kg 21
23
Embodied Water, L/kg 51
67

Common Calculations

PREN (Pitting Resistance) 2.7
2.3
Resilience: Ultimate (Unit Rupture Work), MJ/m3 98 to 110
100
Resilience: Unit (Modulus of Resilience), kJ/m3 180 to 250
1550
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 16 to 18
36
Strength to Weight: Bending, points 17 to 18
29
Thermal Diffusivity, mm2/s 12
11
Thermal Shock Resistance, points 14 to 15
29

Alloy Composition

Aluminum (Al), % 0
0.8 to 1.2
Carbon (C), % 0.050 to 0.17
0.3 to 0.37
Chromium (Cr), % 0.8 to 1.2
1.5 to 1.8
Iron (Fe), % 97 to 98.2
94.4 to 96.3
Manganese (Mn), % 0.4 to 0.65
0.4 to 0.7
Molybdenum (Mo), % 0.45 to 0.6
0.15 to 0.25
Nickel (Ni), % 0
0.85 to 1.2
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