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EN 1.0031 Steel vs. SAE-AISI 1140 Steel

Both EN 1.0031 steel and SAE-AISI 1140 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 EN 1.0031 steel and the bottom bar is SAE-AISI 1140 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 89
170 to 180
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 28
14 to 18
Fatigue Strength, MPa 160
230 to 370
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
72
Shear Strength, MPa 200
370 to 420
Tensile Strength: Ultimate (UTS), MPa 310
600 to 700
Tensile Strength: Yield (Proof), MPa 210
340 to 570

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 400
400
Melting Completion (Liquidus), °C 1470
1460
Melting Onset (Solidus), °C 1420
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 53
51
Thermal Expansion, µm/m-K 12
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.0
7.0
Electrical Conductivity: Equal Weight (Specific), % IACS 8.0
8.1

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
1.8
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 1.4
1.4
Embodied Energy, MJ/kg 18
18
Embodied Water, L/kg 45
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 78
89 to 93
Resilience: Unit (Modulus of Resilience), kJ/m3 120
310 to 870
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 11
21 to 25
Strength to Weight: Bending, points 13
20 to 22
Thermal Diffusivity, mm2/s 14
14
Thermal Shock Resistance, points 9.8
18 to 21

Alloy Composition

Carbon (C), % 0 to 0.1
0.37 to 0.44
Iron (Fe), % 98.8 to 100
98.4 to 98.9
Manganese (Mn), % 0 to 0.7
0.7 to 1.0
Phosphorus (P), % 0 to 0.045
0 to 0.040
Silicon (Si), % 0 to 0.35
0
Sulfur (S), % 0 to 0.045
0.080 to 0.13