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4115 Aluminum vs. AISI 317LMN Stainless Steel

4115 aluminum belongs to the aluminum alloys classification, while AISI 317LMN stainless steel belongs to the iron alloys. There are 31 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.

For each property being compared, the top bar is 4115 aluminum and the bottom bar is AISI 317LMN stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 38 to 68
190
Elastic (Young's, Tensile) Modulus, GPa 70
200
Elongation at Break, % 1.1 to 11
45
Fatigue Strength, MPa 39 to 76
250
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 26
79
Shear Strength, MPa 71 to 130
430
Tensile Strength: Ultimate (UTS), MPa 120 to 220
620
Tensile Strength: Yield (Proof), MPa 39 to 190
270

Thermal Properties

Latent Heat of Fusion, J/g 420
290
Maximum Temperature: Mechanical, °C 160
1020
Melting Completion (Liquidus), °C 640
1460
Melting Onset (Solidus), °C 590
1410
Specific Heat Capacity, J/kg-K 900
470
Thermal Conductivity, W/m-K 160
14
Thermal Expansion, µm/m-K 23
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 41
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 140
2.3

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
24
Density, g/cm3 2.7
8.0
Embodied Carbon, kg CO2/kg material 8.1
4.8
Embodied Energy, MJ/kg 150
65
Embodied Water, L/kg 1160
170

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 2.1 to 10
230
Resilience: Unit (Modulus of Resilience), kJ/m3 11 to 270
180
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 50
25
Strength to Weight: Axial, points 12 to 23
22
Strength to Weight: Bending, points 20 to 30
20
Thermal Diffusivity, mm2/s 66
3.8
Thermal Shock Resistance, points 5.2 to 9.9
14

Alloy Composition

Aluminum (Al), % 94.6 to 97.4
0
Carbon (C), % 0
0 to 0.030
Chromium (Cr), % 0
17 to 20
Copper (Cu), % 0.1 to 0.5
0
Iron (Fe), % 0 to 0.7
54.4 to 65.4
Magnesium (Mg), % 0.1 to 0.5
0
Manganese (Mn), % 0.6 to 1.2
0 to 2.0
Molybdenum (Mo), % 0
4.0 to 5.0
Nickel (Ni), % 0
13.5 to 17.5
Nitrogen (N), % 0
0.1 to 0.2
Phosphorus (P), % 0
0 to 0.045
Silicon (Si), % 1.8 to 2.2
0 to 0.75
Sulfur (S), % 0
0 to 0.030
Zinc (Zn), % 0 to 0.2
0
Residuals, % 0 to 0.15
0