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EN 1.4378 Stainless Steel vs. EN AC-51500 Aluminum

EN 1.4378 stainless steel belongs to the iron alloys classification, while EN AC-51500 aluminum belongs to the aluminum alloys. There are 26 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 1.4378 stainless steel and the bottom bar is EN AC-51500 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190 to 340
80
Elastic (Young's, Tensile) Modulus, GPa 200
68
Elongation at Break, % 14 to 34
5.6
Fatigue Strength, MPa 340 to 550
120
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 77
26
Tensile Strength: Ultimate (UTS), MPa 760 to 1130
280
Tensile Strength: Yield (Proof), MPa 430 to 970
160

Thermal Properties

Latent Heat of Fusion, J/g 290
430
Maximum Temperature: Mechanical, °C 910
170
Melting Completion (Liquidus), °C 1390
630
Melting Onset (Solidus), °C 1350
590
Specific Heat Capacity, J/kg-K 480
910
Thermal Expansion, µm/m-K 17
23

Otherwise Unclassified Properties

Base Metal Price, % relative 12
9.5
Density, g/cm3 7.6
2.6
Embodied Carbon, kg CO2/kg material 2.7
9.0
Embodied Energy, MJ/kg 39
150
Embodied Water, L/kg 150
1150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 150 to 220
13
Resilience: Unit (Modulus of Resilience), kJ/m3 470 to 2370
190
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
52
Strength to Weight: Axial, points 28 to 41
29
Strength to Weight: Bending, points 24 to 31
36
Thermal Shock Resistance, points 16 to 23
13

Alloy Composition

Aluminum (Al), % 0
89.8 to 93.1
Carbon (C), % 0 to 0.080
0
Chromium (Cr), % 17 to 19
0
Copper (Cu), % 0
0 to 0.050
Iron (Fe), % 61.2 to 69
0 to 0.25
Magnesium (Mg), % 0
4.7 to 6.0
Manganese (Mn), % 11.5 to 14.5
0.4 to 0.8
Nickel (Ni), % 2.3 to 3.7
0
Nitrogen (N), % 0.2 to 0.4
0
Phosphorus (P), % 0 to 0.060
0
Silicon (Si), % 0 to 1.0
1.8 to 2.6
Sulfur (S), % 0 to 0.030
0
Titanium (Ti), % 0
0 to 0.25
Zinc (Zn), % 0
0 to 0.070
Residuals, % 0
0 to 0.15