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EN 1.7390 Steel vs. SAE-AISI 5140 Steel

Both EN 1.7390 steel and SAE-AISI 5140 steel are iron alloys. They have a very high 95% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is EN 1.7390 steel and the bottom bar is SAE-AISI 5140 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210
170 to 290
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 16
12 to 29
Fatigue Strength, MPa 310
220 to 570
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 74
73
Shear Strength, MPa 440
360 to 600
Tensile Strength: Ultimate (UTS), MPa 710
560 to 970
Tensile Strength: Yield (Proof), MPa 480
290 to 840

Thermal Properties

Latent Heat of Fusion, J/g 260
250
Maximum Temperature: Mechanical, °C 510
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 40
45
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 8.1
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 9.3
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 4.3
2.1
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.7
1.4
Embodied Energy, MJ/kg 23
19
Embodied Water, L/kg 69
49

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 100
76 to 180
Resilience: Unit (Modulus of Resilience), kJ/m3 600
220 to 1880
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 25
20 to 34
Strength to Weight: Bending, points 23
19 to 28
Thermal Diffusivity, mm2/s 11
12
Thermal Shock Resistance, points 20
16 to 29

Alloy Composition

Carbon (C), % 0 to 0.18
0.38 to 0.43
Chromium (Cr), % 4.0 to 6.0
0.7 to 0.9
Iron (Fe), % 91.9 to 95.3
97.3 to 98.1
Manganese (Mn), % 0.3 to 0.8
0.7 to 0.9
Molybdenum (Mo), % 0.45 to 0.65
0
Phosphorus (P), % 0 to 0.025
0 to 0.035
Silicon (Si), % 0 to 0.4
0.15 to 0.35
Sulfur (S), % 0 to 0.015
0 to 0.040