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SAE-AISI 4340M Steel vs. EN 1.4062 Stainless Steel

Both SAE-AISI 4340M steel and EN 1.4062 stainless steel are iron alloys. They have 78% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI 4340M steel and the bottom bar is EN 1.4062 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 6.0
23 to 34
Fatigue Strength, MPa 690
410 to 420
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 72
79
Shear Strength, MPa 1360
510
Tensile Strength: Ultimate (UTS), MPa 2340
770 to 800
Tensile Strength: Yield (Proof), MPa 1240
530 to 600

Thermal Properties

Latent Heat of Fusion, J/g 280
290
Maximum Temperature: Mechanical, °C 430
1030
Melting Completion (Liquidus), °C 1440
1430
Melting Onset (Solidus), °C 1400
1380
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 38
15
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.8
2.1
Electrical Conductivity: Equal Weight (Specific), % IACS 9.1
2.4

Otherwise Unclassified Properties

Base Metal Price, % relative 3.9
12
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 1.9
2.6
Embodied Energy, MJ/kg 26
37
Embodied Water, L/kg 55
150

Common Calculations

PREN (Pitting Resistance) 2.2
27
Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
170 to 230
Resilience: Unit (Modulus of Resilience), kJ/m3 4120
690 to 910
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 84
28 to 29
Strength to Weight: Bending, points 51
24 to 25
Thermal Diffusivity, mm2/s 10
4.0
Thermal Shock Resistance, points 70
21 to 22

Alloy Composition

Carbon (C), % 0.38 to 0.43
0 to 0.030
Chromium (Cr), % 0.7 to 1.0
21.5 to 24
Iron (Fe), % 93.3 to 94.8
69.3 to 77.3
Manganese (Mn), % 0.65 to 0.9
0 to 2.0
Molybdenum (Mo), % 0.35 to 0.45
0 to 0.45
Nickel (Ni), % 1.7 to 2.0
1.0 to 2.9
Nitrogen (N), % 0
0.16 to 0.28
Phosphorus (P), % 0 to 0.012
0 to 0.040
Silicon (Si), % 1.5 to 1.8
0 to 1.0
Sulfur (S), % 0 to 0.012
0 to 0.010
Vanadium (V), % 0.050 to 0.1
0