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4115 Aluminum vs. AISI 305 Stainless Steel

4115 aluminum belongs to the aluminum alloys classification, while AISI 305 stainless steel belongs to the iron alloys. There are 31 material properties with values for both materials. Properties with values for just one material (3, 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 305 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 38 to 68
170 to 220
Elastic (Young's, Tensile) Modulus, GPa 70
200
Elongation at Break, % 1.1 to 11
34 to 45
Fatigue Strength, MPa 39 to 76
210 to 280
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 26
77
Shear Strength, MPa 71 to 130
400 to 470
Tensile Strength: Ultimate (UTS), MPa 120 to 220
580 to 710
Tensile Strength: Yield (Proof), MPa 39 to 190
230 to 350

Thermal Properties

Latent Heat of Fusion, J/g 420
290
Maximum Temperature: Mechanical, °C 160
540
Melting Completion (Liquidus), °C 640
1450
Melting Onset (Solidus), °C 590
1400
Specific Heat Capacity, J/kg-K 900
480
Thermal Conductivity, W/m-K 160
16
Thermal Expansion, µm/m-K 23
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 41
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 140
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
16
Density, g/cm3 2.7
7.8
Embodied Carbon, kg CO2/kg material 8.1
3.2
Embodied Energy, MJ/kg 150
45
Embodied Water, L/kg 1160
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 2.1 to 10
200 to 210
Resilience: Unit (Modulus of Resilience), kJ/m3 11 to 270
130 to 320
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 50
25
Strength to Weight: Axial, points 12 to 23
20 to 25
Strength to Weight: Bending, points 20 to 30
20 to 23
Thermal Diffusivity, mm2/s 66
4.2
Thermal Shock Resistance, points 5.2 to 9.9
13 to 15

Alloy Composition

Aluminum (Al), % 94.6 to 97.4
0
Carbon (C), % 0
0 to 0.12
Chromium (Cr), % 0
17 to 19
Copper (Cu), % 0.1 to 0.5
0
Iron (Fe), % 0 to 0.7
65.1 to 72.5
Magnesium (Mg), % 0.1 to 0.5
0
Manganese (Mn), % 0.6 to 1.2
0 to 2.0
Nickel (Ni), % 0
10.5 to 13
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