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EN 1.3956 Stainless Steel vs. 4115 Aluminum

EN 1.3956 stainless steel belongs to the iron alloys classification, while 4115 aluminum belongs to the aluminum alloys. There are 25 material properties with values for both materials. Properties with values for just one material (8, 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 EN 1.3956 stainless steel and the bottom bar is 4115 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
70
Elongation at Break, % 27
1.1 to 11
Fatigue Strength, MPa 240
39 to 76
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 79
26
Tensile Strength: Ultimate (UTS), MPa 650
120 to 220
Tensile Strength: Yield (Proof), MPa 330
39 to 190

Thermal Properties

Latent Heat of Fusion, J/g 300
420
Maximum Temperature: Mechanical, °C 1080
160
Melting Completion (Liquidus), °C 1420
640
Melting Onset (Solidus), °C 1380
590
Specific Heat Capacity, J/kg-K 480
900
Thermal Expansion, µm/m-K 13
23

Otherwise Unclassified Properties

Base Metal Price, % relative 22
9.5
Density, g/cm3 7.8
2.7
Embodied Carbon, kg CO2/kg material 4.8
8.1
Embodied Energy, MJ/kg 68
150
Embodied Water, L/kg 180
1160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 150
2.1 to 10
Resilience: Unit (Modulus of Resilience), kJ/m3 270
11 to 270
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
50
Strength to Weight: Axial, points 23
12 to 23
Strength to Weight: Bending, points 21
20 to 30
Thermal Shock Resistance, points 18
5.2 to 9.9

Alloy Composition

Aluminum (Al), % 0
94.6 to 97.4
Carbon (C), % 0 to 0.060
0
Chromium (Cr), % 20.5 to 23.5
0
Copper (Cu), % 0
0.1 to 0.5
Iron (Fe), % 51.9 to 62.1
0 to 0.7
Magnesium (Mg), % 0
0.1 to 0.5
Manganese (Mn), % 4.0 to 6.0
0.6 to 1.2
Molybdenum (Mo), % 1.5 to 3.0
0
Nickel (Ni), % 11.5 to 13.5
0
Niobium (Nb), % 0.1 to 0.3
0
Nitrogen (N), % 0.2 to 0.4
0
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.0
1.8 to 2.2
Sulfur (S), % 0 to 0.030
0
Vanadium (V), % 0.1 to 0.3
0
Zinc (Zn), % 0
0 to 0.2
Residuals, % 0
0 to 0.15