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EN 1.0434 Steel vs. SAE-AISI 1140 Steel

Both EN 1.0434 steel and SAE-AISI 1140 steel are iron alloys. Their average alloy composition is basically identical.

For each property being compared, the top bar is EN 1.0434 steel and the bottom bar is SAE-AISI 1140 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 110 to 160
170 to 180
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 12 to 28
14 to 18
Fatigue Strength, MPa 190 to 300
230 to 370
Poisson's Ratio 0.29
0.29
Reduction in Area, % 64 to 74
39 to 46
Shear Modulus, GPa 73
72
Shear Strength, MPa 280 to 330
370 to 420
Tensile Strength: Ultimate (UTS), MPa 390 to 540
600 to 700
Tensile Strength: Yield (Proof), MPa 250 to 450
340 to 570

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 52
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 46
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 39 to 140
89 to 93
Resilience: Unit (Modulus of Resilience), kJ/m3 170 to 540
310 to 870
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 14 to 19
21 to 25
Strength to Weight: Bending, points 15 to 19
20 to 22
Thermal Diffusivity, mm2/s 14
14
Thermal Shock Resistance, points 12 to 17
18 to 21

Alloy Composition

Aluminum (Al), % 0.020 to 0.060
0
Carbon (C), % 0.15 to 0.19
0.37 to 0.44
Iron (Fe), % 98.8 to 99.18
98.4 to 98.9
Manganese (Mn), % 0.65 to 0.85
0.7 to 1.0
Phosphorus (P), % 0 to 0.025
0 to 0.040
Silicon (Si), % 0 to 0.1
0
Sulfur (S), % 0 to 0.025
0.080 to 0.13

Comparable Variants