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EN 1.3956 Stainless Steel vs. EN AC-51100 Aluminum

EN 1.3956 stainless steel belongs to the iron alloys classification, while EN AC-51100 aluminum belongs to the aluminum alloys. There are 25 material properties with values for both materials. Properties with values for just one material (7, 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 EN AC-51100 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
68
Elongation at Break, % 27
4.5
Fatigue Strength, MPa 240
58
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 79
26
Tensile Strength: Ultimate (UTS), MPa 650
160
Tensile Strength: Yield (Proof), MPa 330
80

Thermal Properties

Latent Heat of Fusion, J/g 300
400
Maximum Temperature: Mechanical, °C 1080
170
Melting Completion (Liquidus), °C 1420
640
Melting Onset (Solidus), °C 1380
620
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
8.7
Embodied Energy, MJ/kg 68
150
Embodied Water, L/kg 180
1180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 150
6.0
Resilience: Unit (Modulus of Resilience), kJ/m3 270
47
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
51
Strength to Weight: Axial, points 23
17
Strength to Weight: Bending, points 21
25
Thermal Shock Resistance, points 18
7.3

Alloy Composition

Aluminum (Al), % 0
94.5 to 97.5
Carbon (C), % 0 to 0.060
0
Chromium (Cr), % 20.5 to 23.5
0
Copper (Cu), % 0
0 to 0.050
Iron (Fe), % 51.9 to 62.1
0 to 0.55
Magnesium (Mg), % 0
2.5 to 3.5
Manganese (Mn), % 4.0 to 6.0
0 to 0.45
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
0 to 0.55
Sulfur (S), % 0 to 0.030
0
Titanium (Ti), % 0
0 to 0.2
Vanadium (V), % 0.1 to 0.3
0
Zinc (Zn), % 0
0 to 0.1
Residuals, % 0
0 to 0.15