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EN 1.3555 Steel vs. SAE-AISI 4340M Steel

Both EN 1.3555 steel and SAE-AISI 4340M steel are iron alloys. Both are furnished in the annealed condition. They have a moderately high 90% of their average alloy composition in common. There are 24 material properties with values for both materials. Properties with values for just one material (11, 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 4340M steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 230
710
Elastic (Young's, Tensile) Modulus, GPa 190
190
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 75
72
Tensile Strength: Ultimate (UTS), MPa 770
2340

Thermal Properties

Latent Heat of Fusion, J/g 260
280
Maximum Temperature: Mechanical, °C 540
430
Melting Completion (Liquidus), °C 1500
1440
Melting Onset (Solidus), °C 1450
1400
Specific Heat Capacity, J/kg-K 460
480
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 9.3
7.8
Electrical Conductivity: Equal Weight (Specific), % IACS 11
9.1

Otherwise Unclassified Properties

Base Metal Price, % relative 11
3.9
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 5.6
1.9
Embodied Energy, MJ/kg 81
26
Embodied Water, L/kg 90
55

Common Calculations

PREN (Pitting Resistance) 18
2.2
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 27
84
Strength to Weight: Bending, points 23
51
Thermal Shock Resistance, points 22
70

Alloy Composition

Carbon (C), % 0.1 to 0.15
0.38 to 0.43
Chromium (Cr), % 3.9 to 4.3
0.7 to 1.0
Copper (Cu), % 0 to 0.1
0
Iron (Fe), % 85.4 to 87.7
93.3 to 94.8
Manganese (Mn), % 0.15 to 0.35
0.65 to 0.9
Molybdenum (Mo), % 4.0 to 4.5
0.35 to 0.45
Nickel (Ni), % 3.2 to 3.6
1.7 to 2.0
Phosphorus (P), % 0 to 0.015
0 to 0.012
Silicon (Si), % 0.1 to 0.25
1.5 to 1.8
Sulfur (S), % 0 to 0.010
0 to 0.012
Tungsten (W), % 0 to 0.15
0
Vanadium (V), % 1.0 to 1.3
0.050 to 0.1