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EN 1.4415 Stainless Steel vs. SAE-AISI 4340M Steel

Both EN 1.4415 stainless steel and SAE-AISI 4340M steel are iron alloys. They have 83% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is EN 1.4415 stainless steel and the bottom bar is SAE-AISI 4340M steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 17 to 20
6.0
Fatigue Strength, MPa 470 to 510
690
Impact Strength: V-Notched Charpy, J 91 to 110
18
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
72
Shear Strength, MPa 520 to 570
1360
Tensile Strength: Ultimate (UTS), MPa 830 to 930
2340
Tensile Strength: Yield (Proof), MPa 730 to 840
1240

Thermal Properties

Latent Heat of Fusion, J/g 280
280
Maximum Temperature: Mechanical, °C 790
430
Melting Completion (Liquidus), °C 1460
1440
Melting Onset (Solidus), °C 1420
1400
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 19
38
Thermal Expansion, µm/m-K 9.9
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
7.8
Electrical Conductivity: Equal Weight (Specific), % IACS 2.8
9.1

Otherwise Unclassified Properties

Base Metal Price, % relative 13
3.9
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 3.6
1.9
Embodied Energy, MJ/kg 51
26
Embodied Water, L/kg 120
55

Common Calculations

PREN (Pitting Resistance) 19
2.2
Resilience: Ultimate (Unit Rupture Work), MJ/m3 150 to 160
120
Resilience: Unit (Modulus of Resilience), kJ/m3 1350 to 1790
4120
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 29 to 33
84
Strength to Weight: Bending, points 25 to 27
51
Thermal Diffusivity, mm2/s 5.1
10
Thermal Shock Resistance, points 30 to 34
70

Alloy Composition

Carbon (C), % 0 to 0.030
0.38 to 0.43
Chromium (Cr), % 11.5 to 13.5
0.7 to 1.0
Iron (Fe), % 75.9 to 82.4
93.3 to 94.8
Manganese (Mn), % 0 to 0.5
0.65 to 0.9
Molybdenum (Mo), % 1.5 to 2.5
0.35 to 0.45
Nickel (Ni), % 4.5 to 6.5
1.7 to 2.0
Phosphorus (P), % 0 to 0.040
0 to 0.012
Silicon (Si), % 0 to 0.5
1.5 to 1.8
Sulfur (S), % 0 to 0.015
0 to 0.012
Titanium (Ti), % 0 to 0.010
0
Vanadium (V), % 0.1 to 0.5
0.050 to 0.1