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EN 1.8818 Steel vs. SAE-AISI 4140 Steel

Both EN 1.8818 steel and SAE-AISI 4140 steel are iron alloys. They have a very high 99% of their average alloy composition in common. 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 1.8818 steel and the bottom bar is SAE-AISI 4140 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 130
200 to 310
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 27
11 to 26
Fatigue Strength, MPa 200
360 to 650
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Shear Strength, MPa 280
410 to 660
Tensile Strength: Ultimate (UTS), MPa 440
690 to 1080
Tensile Strength: Yield (Proof), MPa 270
590 to 990

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 400
420
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 48
43
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 8.5
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 2.4
2.4
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.6
1.5
Embodied Energy, MJ/kg 21
20
Embodied Water, L/kg 49
51

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
74 to 180
Resilience: Unit (Modulus of Resilience), kJ/m3 200
920 to 2590
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 16
25 to 38
Strength to Weight: Bending, points 16
22 to 30
Thermal Diffusivity, mm2/s 13
12
Thermal Shock Resistance, points 13
20 to 32

Alloy Composition

Aluminum (Al), % 0.015 to 0.034
0
Carbon (C), % 0 to 0.15
0.38 to 0.43
Chromium (Cr), % 0 to 0.35
0.8 to 1.1
Copper (Cu), % 0 to 0.6
0
Iron (Fe), % 95.9 to 99.985
96.8 to 97.8
Manganese (Mn), % 0 to 1.6
0.75 to 1.0
Molybdenum (Mo), % 0 to 0.13
0.15 to 0.25
Nickel (Ni), % 0 to 0.35
0
Niobium (Nb), % 0 to 0.060
0
Nitrogen (N), % 0 to 0.017
0
Phosphorus (P), % 0 to 0.035
0 to 0.035
Silicon (Si), % 0 to 0.55
0.15 to 0.35
Sulfur (S), % 0 to 0.030
0 to 0.040
Titanium (Ti), % 0 to 0.060
0
Vanadium (V), % 0 to 0.1
0