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SAE-AISI 4340M Steel vs. EN 1.4110 Stainless Steel

Both SAE-AISI 4340M steel and EN 1.4110 stainless steel are iron alloys. They have 86% 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 1.4110 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 6.0
11 to 14
Fatigue Strength, MPa 690
250 to 730
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 72
76
Shear Strength, MPa 1360
470 to 1030
Tensile Strength: Ultimate (UTS), MPa 2340
770 to 1720
Tensile Strength: Yield (Proof), MPa 1240
430 to 1330

Thermal Properties

Latent Heat of Fusion, J/g 280
280
Maximum Temperature: Mechanical, °C 430
790
Melting Completion (Liquidus), °C 1440
1440
Melting Onset (Solidus), °C 1400
1400
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 38
30
Thermal Expansion, µm/m-K 13
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.8
2.8
Electrical Conductivity: Equal Weight (Specific), % IACS 9.1
3.2

Otherwise Unclassified Properties

Base Metal Price, % relative 3.9
8.0
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 1.9
2.3
Embodied Energy, MJ/kg 26
33
Embodied Water, L/kg 55
110

Common Calculations

PREN (Pitting Resistance) 2.2
16
Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
90 to 180
Resilience: Unit (Modulus of Resilience), kJ/m3 4120
480 to 4550
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 84
28 to 62
Strength to Weight: Bending, points 51
24 to 41
Thermal Diffusivity, mm2/s 10
8.1
Thermal Shock Resistance, points 70
27 to 60

Alloy Composition

Carbon (C), % 0.38 to 0.43
0.48 to 0.6
Chromium (Cr), % 0.7 to 1.0
13 to 15
Iron (Fe), % 93.3 to 94.8
81.4 to 86
Manganese (Mn), % 0.65 to 0.9
0 to 1.0
Molybdenum (Mo), % 0.35 to 0.45
0.5 to 0.8
Nickel (Ni), % 1.7 to 2.0
0
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 0.015
Vanadium (V), % 0.050 to 0.1
0 to 0.15