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EN 1.1140 Steel vs. ASTM A372 Grade J Steel

Both EN 1.1140 steel and ASTM A372 grade J steel are iron alloys. They have a very high 98% of their average alloy composition in common.

For each property being compared, the top bar is EN 1.1140 steel and the bottom bar is ASTM A372 grade J steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 130
200 to 310
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 28
17 to 22
Fatigue Strength, MPa 170
310 to 570
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Shear Strength, MPa 280
410 to 630
Tensile Strength: Ultimate (UTS), MPa 430
650 to 1020
Tensile Strength: Yield (Proof), MPa 230
430 to 850

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 400
420
Melting Completion (Liquidus), °C 1460
1460
Melting Onset (Solidus), °C 1420
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 51
44
Thermal Expansion, µm/m-K 12
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.0
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 8.0
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
2.4
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.4
1.5
Embodied Energy, MJ/kg 18
20
Embodied Water, L/kg 45
51

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 100
130 to 170
Resilience: Unit (Modulus of Resilience), kJ/m3 140
500 to 1930
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 15
23 to 36
Strength to Weight: Bending, points 16
21 to 29
Thermal Diffusivity, mm2/s 14
12
Thermal Shock Resistance, points 14
19 to 30

Alloy Composition

Carbon (C), % 0.12 to 0.18
0.35 to 0.5
Chromium (Cr), % 0
0.8 to 1.2
Iron (Fe), % 98.7 to 99.56
96.7 to 97.8
Manganese (Mn), % 0.3 to 0.6
0.75 to 1.1
Molybdenum (Mo), % 0
0.15 to 0.25
Phosphorus (P), % 0 to 0.035
0 to 0.015
Silicon (Si), % 0 to 0.4
0.15 to 0.35
Sulfur (S), % 0.020 to 0.040
0 to 0.010