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SAE-AISI 1040 Steel vs. EN 1.5508 Steel

Both SAE-AISI 1040 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 1040 steel and the bottom bar is EN 1.5508 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160 to 180
130 to 180
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 13 to 20
11 to 20
Fatigue Strength, MPa 220 to 340
210 to 320
Poisson's Ratio 0.29
0.29
Reduction in Area, % 40 to 45
62 to 74
Shear Modulus, GPa 73
73
Shear Strength, MPa 350 to 390
300 to 360
Tensile Strength: Ultimate (UTS), MPa 570 to 640
420 to 1460
Tensile Strength: Yield (Proof), MPa 320 to 530
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 12
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.0
7.1
Electrical Conductivity: Equal Weight (Specific), % IACS 8.0
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 79 to 96
44 to 230
Resilience: Unit (Modulus of Resilience), kJ/m3 270 to 760
260 to 640
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 20 to 23
15 to 52
Strength to Weight: Bending, points 19 to 21
16 to 36
Thermal Diffusivity, mm2/s 14
14
Thermal Shock Resistance, points 18 to 20
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), % 98.6 to 99.03
97.9 to 99.199
Manganese (Mn), % 0.6 to 0.9
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 to 0.050
0 to 0.025

Comparable Variants