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SAE-AISI 4340M Steel vs. S41041 Stainless Steel

Both SAE-AISI 4340M steel and S41041 stainless steel are iron alloys. They have 88% of their average alloy composition in common. There are 33 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 SAE-AISI 4340M steel and the bottom bar is S41041 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 710
240
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 6.0
17
Fatigue Strength, MPa 690
350
Impact Strength: V-Notched Charpy, J 18
31
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 72
76
Shear Strength, MPa 1360
560
Tensile Strength: Ultimate (UTS), MPa 2340
910
Tensile Strength: Yield (Proof), MPa 1240
580

Thermal Properties

Latent Heat of Fusion, J/g 280
270
Maximum Temperature: Mechanical, °C 430
740
Melting Completion (Liquidus), °C 1440
1450
Melting Onset (Solidus), °C 1400
1410
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 38
29
Thermal Expansion, µm/m-K 13
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.8
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 9.1
3.3

Otherwise Unclassified Properties

Base Metal Price, % relative 3.9
8.5
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.9
2.2
Embodied Energy, MJ/kg 26
31
Embodied Water, L/kg 55
100

Common Calculations

PREN (Pitting Resistance) 2.2
13
Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
140
Resilience: Unit (Modulus of Resilience), kJ/m3 4120
860
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 84
32
Strength to Weight: Bending, points 51
27
Thermal Diffusivity, mm2/s 10
7.8
Thermal Shock Resistance, points 70
33

Alloy Composition

Aluminum (Al), % 0
0 to 0.050
Carbon (C), % 0.38 to 0.43
0.13 to 0.18
Chromium (Cr), % 0.7 to 1.0
11.5 to 13
Iron (Fe), % 93.3 to 94.8
84.5 to 87.8
Manganese (Mn), % 0.65 to 0.9
0.4 to 0.6
Molybdenum (Mo), % 0.35 to 0.45
0 to 0.2
Nickel (Ni), % 1.7 to 2.0
0 to 0.5
Niobium (Nb), % 0
0.15 to 0.45
Phosphorus (P), % 0 to 0.012
0 to 0.030
Silicon (Si), % 1.5 to 1.8
0 to 0.5
Sulfur (S), % 0 to 0.012
0 to 0.030
Vanadium (V), % 0.050 to 0.1
0