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EN 1.3558 Steel vs. SAE-AISI 4340M Steel

Both EN 1.3558 steel and SAE-AISI 4340M steel are iron alloys. They have 78% of their average alloy composition in common. There are 26 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 1.3558 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 210
190
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 80
72
Tensile Strength: Ultimate (UTS), MPa 770
2340

Thermal Properties

Latent Heat of Fusion, J/g 240
280
Maximum Temperature: Mechanical, °C 490
430
Melting Completion (Liquidus), °C 1810
1440
Melting Onset (Solidus), °C 1760
1400
Specific Heat Capacity, J/kg-K 410
480
Thermal Conductivity, W/m-K 20
38
Thermal Expansion, µm/m-K 12
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 13
7.8
Electrical Conductivity: Equal Weight (Specific), % IACS 12
9.1

Otherwise Unclassified Properties

Base Metal Price, % relative 45
3.9
Density, g/cm3 9.3
7.8
Embodied Carbon, kg CO2/kg material 8.4
1.9
Embodied Energy, MJ/kg 130
26
Embodied Water, L/kg 90
55

Common Calculations

PREN (Pitting Resistance) 35
2.2
Stiffness to Weight: Axial, points 12
13
Stiffness to Weight: Bending, points 21
25
Strength to Weight: Axial, points 23
84
Strength to Weight: Bending, points 20
51
Thermal Diffusivity, mm2/s 5.3
10
Thermal Shock Resistance, points 22
70

Alloy Composition

Carbon (C), % 0.7 to 0.8
0.38 to 0.43
Chromium (Cr), % 3.9 to 4.3
0.7 to 1.0
Copper (Cu), % 0 to 0.3
0
Iron (Fe), % 73.7 to 77.6
93.3 to 94.8
Manganese (Mn), % 0 to 0.4
0.65 to 0.9
Molybdenum (Mo), % 0 to 0.6
0.35 to 0.45
Nickel (Ni), % 0
1.7 to 2.0
Phosphorus (P), % 0 to 0.025
0 to 0.012
Silicon (Si), % 0 to 0.4
1.5 to 1.8
Sulfur (S), % 0 to 0.015
0 to 0.012
Tungsten (W), % 17.5 to 19
0
Vanadium (V), % 1.0 to 1.3
0.050 to 0.1