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EN 1.1151 Steel vs. ASTM A372 Grade H Steel

Both EN 1.1151 steel and ASTM A372 grade H steel are iron alloys. Their average alloy composition is basically identical.

For each property being compared, the top bar is EN 1.1151 steel and the bottom bar is ASTM A372 grade H steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 130 to 150
200 to 280
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 21 to 26
20 to 22
Fatigue Strength, MPa 180 to 240
310 to 380
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Shear Strength, MPa 300 to 330
410 to 570
Tensile Strength: Ultimate (UTS), MPa 460 to 520
650 to 910
Tensile Strength: Yield (Proof), MPa 240 to 340
430 to 550

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 400
410
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 50
45
Thermal Expansion, µm/m-K 12
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.1
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 8.2
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 2.1
2.3
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.4
1.5
Embodied Energy, MJ/kg 19
20
Embodied Water, L/kg 47
49

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 98 to 100
130 to 160
Resilience: Unit (Modulus of Resilience), kJ/m3 160 to 310
500 to 810
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 16 to 18
23 to 32
Strength to Weight: Bending, points 17 to 18
21 to 27
Thermal Diffusivity, mm2/s 13
12
Thermal Shock Resistance, points 15 to 16
19 to 27

Alloy Composition

Carbon (C), % 0.17 to 0.24
0.3 to 0.4
Chromium (Cr), % 0 to 0.4
0.4 to 0.65
Iron (Fe), % 97.7 to 99.43
97.3 to 98.3
Manganese (Mn), % 0.4 to 0.7
0.75 to 1.1
Molybdenum (Mo), % 0 to 0.1
0.15 to 0.25
Nickel (Ni), % 0 to 0.4
0
Phosphorus (P), % 0 to 0.035
0 to 0.015
Silicon (Si), % 0 to 0.4
0.15 to 0.35
Sulfur (S), % 0 to 0.035
0 to 0.010