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SAE-AISI 4340 Steel vs. EN 1.7383 Steel

Both SAE-AISI 4340 steel and EN 1.7383 steel are iron alloys. They have a very high 98% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI 4340 steel and the bottom bar is EN 1.7383 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210 to 360
170 to 180
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 12 to 22
20 to 23
Fatigue Strength, MPa 330 to 740
210 to 270
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
74
Shear Strength, MPa 430 to 770
350 to 380
Tensile Strength: Ultimate (UTS), MPa 690 to 1280
560 to 610
Tensile Strength: Yield (Proof), MPa 470 to 1150
300 to 400

Thermal Properties

Latent Heat of Fusion, J/g 250
260
Maximum Temperature: Mechanical, °C 430
460
Melting Completion (Liquidus), °C 1460
1470
Melting Onset (Solidus), °C 1420
1430
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 44
39
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.5
7.7
Electrical Conductivity: Equal Weight (Specific), % IACS 8.6
8.8

Otherwise Unclassified Properties

Base Metal Price, % relative 3.5
3.9
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 1.7
1.8
Embodied Energy, MJ/kg 22
23
Embodied Water, L/kg 53
59

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 79 to 170
110
Resilience: Unit (Modulus of Resilience), kJ/m3 590 to 3490
240 to 420
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 24 to 45
20 to 22
Strength to Weight: Bending, points 22 to 33
19 to 20
Thermal Diffusivity, mm2/s 12
11
Thermal Shock Resistance, points 20 to 38
16 to 18

Alloy Composition

Aluminum (Al), % 0
0 to 0.040
Carbon (C), % 0.38 to 0.43
0.080 to 0.15
Chromium (Cr), % 0.7 to 0.9
2.0 to 2.5
Copper (Cu), % 0
0 to 0.3
Iron (Fe), % 95.1 to 96.3
94.3 to 96.6
Manganese (Mn), % 0.6 to 0.8
0.4 to 0.8
Molybdenum (Mo), % 0.2 to 0.3
0.9 to 1.1
Nickel (Ni), % 1.7 to 2.0
0 to 0.3
Phosphorus (P), % 0 to 0.035
0 to 0.025
Silicon (Si), % 0.15 to 0.35
0 to 0.5
Sulfur (S), % 0 to 0.040
0 to 0.010

Comparable Variants