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SAE-AISI 1140 Steel vs. EN 1.1158 Steel

Both SAE-AISI 1140 steel and EN 1.1158 steel are iron alloys. Their average alloy composition is basically identical. There are 31 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 SAE-AISI 1140 steel and the bottom bar is EN 1.1158 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170 to 180
140 to 150
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 14 to 18
23 to 24
Fatigue Strength, MPa 230 to 370
170 to 220
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 72
73
Shear Strength, MPa 370 to 420
300 to 320
Tensile Strength: Ultimate (UTS), MPa 600 to 700
470 to 500
Tensile Strength: Yield (Proof), MPa 340 to 570
240 to 310

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 400
400
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
49
Thermal Expansion, µm/m-K 13
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.0
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 8.1
8.2

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
2.1
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.4
1.4
Embodied Energy, MJ/kg 18
19
Embodied Water, L/kg 46
47

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 89 to 93
89 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 310 to 870
150 to 250
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 21 to 25
17 to 18
Strength to Weight: Bending, points 20 to 22
17 to 18
Thermal Diffusivity, mm2/s 14
13
Thermal Shock Resistance, points 18 to 21
15 to 16

Alloy Composition

Carbon (C), % 0.37 to 0.44
0.22 to 0.29
Chromium (Cr), % 0
0 to 0.4
Iron (Fe), % 98.4 to 98.9
97.6 to 99.38
Manganese (Mn), % 0.7 to 1.0
0.4 to 0.7
Molybdenum (Mo), % 0
0 to 0.1
Nickel (Ni), % 0
0 to 0.4
Phosphorus (P), % 0 to 0.040
0 to 0.035
Silicon (Si), % 0
0 to 0.4
Sulfur (S), % 0.080 to 0.13
0 to 0.035