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SAE-AISI 5140 Steel vs. EN 1.1181 Steel

Both SAE-AISI 5140 steel and EN 1.1181 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 (1, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI 5140 steel and the bottom bar is EN 1.1181 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170 to 290
160 to 180
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 12 to 29
19 to 20
Fatigue Strength, MPa 220 to 570
190 to 260
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Shear Strength, MPa 360 to 600
350 to 390
Tensile Strength: Ultimate (UTS), MPa 560 to 970
560 to 620
Tensile Strength: Yield (Proof), MPa 290 to 840
280 to 380

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 420
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 45
42
Thermal Expansion, µm/m-K 13
11

Electrical Properties

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

Otherwise Unclassified Properties

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

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 76 to 180
90 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 220 to 1880
210 to 380
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 20 to 34
20 to 22
Strength to Weight: Bending, points 19 to 28
19 to 21
Thermal Diffusivity, mm2/s 12
11
Thermal Shock Resistance, points 16 to 29
19 to 21

Alloy Composition

Carbon (C), % 0.38 to 0.43
0.32 to 0.39
Chromium (Cr), % 0.7 to 0.9
0 to 0.4
Iron (Fe), % 97.3 to 98.1
97.4 to 99.18
Manganese (Mn), % 0.7 to 0.9
0.5 to 0.8
Molybdenum (Mo), % 0
0 to 0.1
Nickel (Ni), % 0
0 to 0.4
Phosphorus (P), % 0 to 0.035
0 to 0.035
Silicon (Si), % 0.15 to 0.35
0 to 0.4
Sulfur (S), % 0 to 0.040
0 to 0.035

Comparable Variants