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EN 1.1127 Steel vs. ASTM A372 Grade H Steel

Both EN 1.1127 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 1.1127 steel and the bottom bar is ASTM A372 grade H steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190 to 230
200 to 280
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 14 to 25
20 to 22
Fatigue Strength, MPa 280 to 370
310 to 380
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Shear Strength, MPa 420 to 480
410 to 570
Tensile Strength: Ultimate (UTS), MPa 660 to 790
650 to 910
Tensile Strength: Yield (Proof), MPa 410 to 580
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 1410
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 49
45
Thermal Expansion, µm/m-K 12
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 8.4
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 1.5
1.5
Embodied Energy, MJ/kg 19
20
Embodied Water, L/kg 49
49

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 90 to 140
130 to 160
Resilience: Unit (Modulus of Resilience), kJ/m3 440 to 880
500 to 810
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 23 to 28
23 to 32
Strength to Weight: Bending, points 22 to 24
21 to 27
Thermal Diffusivity, mm2/s 13
12
Thermal Shock Resistance, points 21 to 25
19 to 27

Alloy Composition

Carbon (C), % 0.34 to 0.42
0.3 to 0.4
Chromium (Cr), % 0 to 0.4
0.4 to 0.65
Iron (Fe), % 96.6 to 98.1
97.3 to 98.3
Manganese (Mn), % 1.4 to 1.7
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), % 0.15 to 0.35
0.15 to 0.35
Sulfur (S), % 0 to 0.035
0 to 0.010