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SAE-AISI 4340 Steel vs. EN 1.4162 Stainless Steel

Both SAE-AISI 4340 steel and EN 1.4162 stainless steel are iron alloys. They have 74% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (3, 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 1.4162 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210 to 360
250
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 12 to 22
32
Fatigue Strength, MPa 330 to 740
410
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
78
Shear Strength, MPa 430 to 770
520
Tensile Strength: Ultimate (UTS), MPa 690 to 1280
780
Tensile Strength: Yield (Proof), MPa 470 to 1150
520

Thermal Properties

Latent Heat of Fusion, J/g 250
290
Maximum Temperature: Mechanical, °C 430
1000
Melting Completion (Liquidus), °C 1460
1420
Melting Onset (Solidus), °C 1420
1370
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 44
15
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.5
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 8.6
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 3.5
12
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 1.7
2.6
Embodied Energy, MJ/kg 22
38
Embodied Water, L/kg 53
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 79 to 170
220
Resilience: Unit (Modulus of Resilience), kJ/m3 590 to 3490
690
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 24 to 45
28
Strength to Weight: Bending, points 22 to 33
25
Thermal Diffusivity, mm2/s 12
4.0
Thermal Shock Resistance, points 20 to 38
21

Alloy Composition

Carbon (C), % 0.38 to 0.43
0 to 0.040
Chromium (Cr), % 0.7 to 0.9
21 to 22
Copper (Cu), % 0
0.1 to 0.8
Iron (Fe), % 95.1 to 96.3
67.2 to 73.3
Manganese (Mn), % 0.6 to 0.8
4.0 to 6.0
Molybdenum (Mo), % 0.2 to 0.3
0.1 to 0.8
Nickel (Ni), % 1.7 to 2.0
1.4 to 1.9
Nitrogen (N), % 0
0.2 to 0.25
Phosphorus (P), % 0 to 0.035
0 to 0.040
Silicon (Si), % 0.15 to 0.35
0 to 1.0
Sulfur (S), % 0 to 0.040
0 to 0.015