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EN 1.3555 Steel vs. SAE-AISI 4340 Steel

Both EN 1.3555 steel and SAE-AISI 4340 steel are iron alloys. They have a moderately high 90% of their average alloy composition in common. There are 23 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is EN 1.3555 steel and the bottom bar is SAE-AISI 4340 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 230
210 to 360
Elastic (Young's, Tensile) Modulus, GPa 190
190
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 75
73
Tensile Strength: Ultimate (UTS), MPa 770
690 to 1280

Thermal Properties

Latent Heat of Fusion, J/g 260
250
Maximum Temperature: Mechanical, °C 540
430
Melting Completion (Liquidus), °C 1500
1460
Melting Onset (Solidus), °C 1450
1420
Specific Heat Capacity, J/kg-K 460
470
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 9.3
7.5
Electrical Conductivity: Equal Weight (Specific), % IACS 11
8.6

Otherwise Unclassified Properties

Base Metal Price, % relative 11
3.5
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 5.6
1.7
Embodied Energy, MJ/kg 81
22
Embodied Water, L/kg 90
53

Common Calculations

Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 27
24 to 45
Strength to Weight: Bending, points 23
22 to 33
Thermal Shock Resistance, points 22
20 to 38

Alloy Composition

Carbon (C), % 0.1 to 0.15
0.38 to 0.43
Chromium (Cr), % 3.9 to 4.3
0.7 to 0.9
Copper (Cu), % 0 to 0.1
0
Iron (Fe), % 85.4 to 87.7
95.1 to 96.3
Manganese (Mn), % 0.15 to 0.35
0.6 to 0.8
Molybdenum (Mo), % 4.0 to 4.5
0.2 to 0.3
Nickel (Ni), % 3.2 to 3.6
1.7 to 2.0
Phosphorus (P), % 0 to 0.015
0 to 0.035
Silicon (Si), % 0.1 to 0.25
0.15 to 0.35
Sulfur (S), % 0 to 0.010
0 to 0.040
Tungsten (W), % 0 to 0.15
0
Vanadium (V), % 1.0 to 1.3
0