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SAE-AISI 4340 Steel vs. EN 1.7233 Steel

Both SAE-AISI 4340 steel and EN 1.7233 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 (1, 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 1.7233 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210 to 360
210 to 290
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 12 to 22
18 to 23
Fatigue Strength, MPa 330 to 740
270 to 530
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Shear Strength, MPa 430 to 770
450 to 590
Tensile Strength: Ultimate (UTS), MPa 690 to 1280
700 to 960
Tensile Strength: Yield (Proof), MPa 470 to 1150
380 to 780

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 430
430
Melting Completion (Liquidus), °C 1460
1460
Melting Onset (Solidus), °C 1420
1420
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
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 8.6
8.5

Otherwise Unclassified Properties

Base Metal Price, % relative 3.5
3.0
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.7
1.6
Embodied Energy, MJ/kg 22
21
Embodied Water, L/kg 53
53

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 79 to 170
110 to 200
Resilience: Unit (Modulus of Resilience), kJ/m3 590 to 3490
380 to 1630
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 24 to 45
25 to 34
Strength to Weight: Bending, points 22 to 33
22 to 28
Thermal Diffusivity, mm2/s 12
11
Thermal Shock Resistance, points 20 to 38
21 to 28

Alloy Composition

Carbon (C), % 0.38 to 0.43
0.39 to 0.45
Chromium (Cr), % 0.7 to 0.9
1.2 to 1.5
Iron (Fe), % 95.1 to 96.3
96.2 to 97.5
Manganese (Mn), % 0.6 to 0.8
0.4 to 0.7
Molybdenum (Mo), % 0.2 to 0.3
0.5 to 0.7
Nickel (Ni), % 1.7 to 2.0
0
Phosphorus (P), % 0 to 0.035
0 to 0.025
Silicon (Si), % 0.15 to 0.35
0 to 0.4
Sulfur (S), % 0 to 0.040
0 to 0.035

Comparable Variants