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SAE-AISI 1140 Steel vs. EN 1.5508 Steel

Both SAE-AISI 1140 steel and EN 1.5508 steel are iron alloys. Their average alloy composition is basically identical.

For each property being compared, the top bar is SAE-AISI 1140 steel and the bottom bar is EN 1.5508 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170 to 180
130 to 180
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 14 to 18
11 to 20
Fatigue Strength, MPa 230 to 370
210 to 320
Poisson's Ratio 0.29
0.29
Reduction in Area, % 39 to 46
62 to 74
Shear Modulus, GPa 72
73
Shear Strength, MPa 370 to 420
300 to 360
Tensile Strength: Ultimate (UTS), MPa 600 to 700
420 to 1460
Tensile Strength: Yield (Proof), MPa 340 to 570
310 to 490

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
51
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.0
7.1
Electrical Conductivity: Equal Weight (Specific), % IACS 8.1
8.2

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
1.9
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
44 to 230
Resilience: Unit (Modulus of Resilience), kJ/m3 310 to 870
260 to 640
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 21 to 25
15 to 52
Strength to Weight: Bending, points 20 to 22
16 to 36
Thermal Diffusivity, mm2/s 14
14
Thermal Shock Resistance, points 18 to 21
12 to 43

Alloy Composition

Boron (B), % 0
0.00080 to 0.0050
Carbon (C), % 0.37 to 0.44
0.2 to 0.25
Chromium (Cr), % 0
0 to 0.3
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 98.4 to 98.9
97.9 to 99.199
Manganese (Mn), % 0.7 to 1.0
0.6 to 0.9
Phosphorus (P), % 0 to 0.040
0 to 0.025
Silicon (Si), % 0
0 to 0.3
Sulfur (S), % 0.080 to 0.13
0 to 0.025

Comparable Variants