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SAE-AISI 5140 Steel vs. EN 1.7077 Steel

Both SAE-AISI 5140 steel and EN 1.7077 steel are iron alloys. Their average alloy composition is basically identical. There are 25 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI 5140 steel and the bottom bar is EN 1.7077 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170 to 290
150 to 180
Elastic (Young's, Tensile) Modulus, GPa 190
190
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Tensile Strength: Ultimate (UTS), MPa 560 to 970
490 to 1750

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 420
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 45
45
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 2.1
2.3
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.4
1.4
Embodied Energy, MJ/kg 19
19
Embodied Water, L/kg 49
51

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 20 to 34
17 to 62
Strength to Weight: Bending, points 19 to 28
18 to 41
Thermal Diffusivity, mm2/s 12
12
Thermal Shock Resistance, points 16 to 29
14 to 51

Alloy Composition

Boron (B), % 0
0.00080 to 0.0050
Carbon (C), % 0.38 to 0.43
0.34 to 0.38
Chromium (Cr), % 0.7 to 0.9
0.9 to 1.2
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 97.3 to 98.1
96.8 to 98.1
Manganese (Mn), % 0.7 to 0.9
0.7 to 1.0
Phosphorus (P), % 0 to 0.035
0 to 0.025
Silicon (Si), % 0.15 to 0.35
0 to 0.3
Sulfur (S), % 0 to 0.040
0 to 0.025