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EN 1.7149 Steel vs. SAE-AISI 5140 Steel

Both EN 1.7149 steel and SAE-AISI 5140 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 (6, in this case) are not shown.

For each property being compared, the top bar is EN 1.7149 steel and the bottom bar is SAE-AISI 5140 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150 to 180
170 to 290
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 500 to 1460
560 to 970

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 46
45
Thermal Expansion, µm/m-K 13
13

Electrical Properties

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

Otherwise Unclassified Properties

Base Metal Price, % relative 2.3
2.1
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.5
1.4
Embodied Energy, MJ/kg 19
19
Embodied Water, L/kg 52
49

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 18 to 52
20 to 34
Strength to Weight: Bending, points 18 to 36
19 to 28
Thermal Diffusivity, mm2/s 12
12
Thermal Shock Resistance, points 15 to 42
16 to 29

Alloy Composition

Carbon (C), % 0.17 to 0.22
0.38 to 0.43
Chromium (Cr), % 1.0 to 1.3
0.7 to 0.9
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 96.5 to 97.7
97.3 to 98.1
Manganese (Mn), % 1.1 to 1.4
0.7 to 0.9
Phosphorus (P), % 0 to 0.025
0 to 0.035
Silicon (Si), % 0 to 0.3
0.15 to 0.35
Sulfur (S), % 0.020 to 0.040
0 to 0.040