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EN 1.3963 Alloy vs. SAE-AISI 4340 Steel

Both EN 1.3963 alloy and SAE-AISI 4340 steel are iron alloys. They have 65% of their average alloy composition in common. There are 24 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is EN 1.3963 alloy and the bottom bar is SAE-AISI 4340 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 29
12 to 22
Poisson's Ratio 0.3
0.29
Shear Modulus, GPa 72
73
Shear Strength, MPa 290
430 to 770
Tensile Strength: Ultimate (UTS), MPa 440
690 to 1280
Tensile Strength: Yield (Proof), MPa 310
470 to 1150

Thermal Properties

Latent Heat of Fusion, J/g 270
250
Melting Completion (Liquidus), °C 1430
1460
Melting Onset (Solidus), °C 1390
1420
Specific Heat Capacity, J/kg-K 460
470
Thermal Expansion, µm/m-K 1.6
13

Otherwise Unclassified Properties

Base Metal Price, % relative 25
3.5
Density, g/cm3 8.2
7.8
Embodied Carbon, kg CO2/kg material 4.8
1.7
Embodied Energy, MJ/kg 66
22
Embodied Water, L/kg 110
53

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
79 to 170
Resilience: Unit (Modulus of Resilience), kJ/m3 260
590 to 3490
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 15
24 to 45
Strength to Weight: Bending, points 16
22 to 33
Thermal Shock Resistance, points 110
20 to 38

Alloy Composition

Carbon (C), % 0 to 0.050
0.38 to 0.43
Chromium (Cr), % 0 to 0.25
0.7 to 0.9
Iron (Fe), % 60.5 to 64.9
95.1 to 96.3
Manganese (Mn), % 0 to 0.5
0.6 to 0.8
Molybdenum (Mo), % 0 to 1.0
0.2 to 0.3
Nickel (Ni), % 35 to 37
1.7 to 2.0
Phosphorus (P), % 0 to 0.030
0 to 0.035
Silicon (Si), % 0 to 0.5
0.15 to 0.35
Sulfur (S), % 0.1 to 0.2
0 to 0.040