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EN 1.7390 Steel vs. ASTM A387 Grade 12 Steel

Both EN 1.7390 steel and ASTM A387 grade 12 steel are iron alloys. They have a very high 96% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is EN 1.7390 steel and the bottom bar is ASTM A387 grade 12 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210
140 to 160
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 16
25
Fatigue Strength, MPa 310
190 to 230
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 74
73
Shear Strength, MPa 440
300 to 330
Tensile Strength: Ultimate (UTS), MPa 710
470 to 520
Tensile Strength: Yield (Proof), MPa 480
260 to 310

Thermal Properties

Latent Heat of Fusion, J/g 260
250
Maximum Temperature: Mechanical, °C 510
430
Melting Completion (Liquidus), °C 1460
1470
Melting Onset (Solidus), °C 1420
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 40
44
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 8.1
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 9.3
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 4.3
2.8
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.7
1.6
Embodied Energy, MJ/kg 23
21
Embodied Water, L/kg 69
51

Common Calculations

PREN (Pitting Resistance) 6.8
2.7
Resilience: Ultimate (Unit Rupture Work), MJ/m3 100
98 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 600
180 to 250
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 25
16 to 18
Strength to Weight: Bending, points 23
17 to 18
Thermal Diffusivity, mm2/s 11
12
Thermal Shock Resistance, points 20
14 to 15

Alloy Composition

Carbon (C), % 0 to 0.18
0.050 to 0.17
Chromium (Cr), % 4.0 to 6.0
0.8 to 1.2
Iron (Fe), % 91.9 to 95.3
97 to 98.2
Manganese (Mn), % 0.3 to 0.8
0.4 to 0.65
Molybdenum (Mo), % 0.45 to 0.65
0.45 to 0.6
Phosphorus (P), % 0 to 0.025
0 to 0.025
Silicon (Si), % 0 to 0.4
0.15 to 0.4
Sulfur (S), % 0 to 0.015
0 to 0.025