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EN 1.4988 Stainless Steel vs. 5050 Aluminum

EN 1.4988 stainless steel belongs to the iron alloys classification, while 5050 aluminum belongs to the aluminum 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 EN 1.4988 stainless steel and the bottom bar is 5050 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
36 to 68
Elastic (Young's, Tensile) Modulus, GPa 200
68
Elongation at Break, % 34
1.7 to 22
Fatigue Strength, MPa 230
45 to 100
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 77
26
Shear Strength, MPa 430
91 to 140
Tensile Strength: Ultimate (UTS), MPa 640
140 to 250
Tensile Strength: Yield (Proof), MPa 290
50 to 210

Thermal Properties

Latent Heat of Fusion, J/g 290
400
Maximum Temperature: Mechanical, °C 920
180
Melting Completion (Liquidus), °C 1450
650
Melting Onset (Solidus), °C 1400
630
Specific Heat Capacity, J/kg-K 470
900
Thermal Conductivity, W/m-K 15
190
Thermal Expansion, µm/m-K 16
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
50
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
170

Otherwise Unclassified Properties

Base Metal Price, % relative 23
9.5
Density, g/cm3 7.9
2.7
Embodied Carbon, kg CO2/kg material 6.0
8.4
Embodied Energy, MJ/kg 89
150
Embodied Water, L/kg 150
1190

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 180
4.1 to 24
Resilience: Unit (Modulus of Resilience), kJ/m3 210
18 to 330
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
50
Strength to Weight: Axial, points 23
15 to 26
Strength to Weight: Bending, points 21
22 to 33
Thermal Diffusivity, mm2/s 4.0
79
Thermal Shock Resistance, points 14
6.3 to 11

Alloy Composition

Aluminum (Al), % 0
96.3 to 98.9
Carbon (C), % 0.040 to 0.1
0
Chromium (Cr), % 15.5 to 17.5
0 to 0.1
Copper (Cu), % 0
0 to 0.2
Iron (Fe), % 62.1 to 69.5
0 to 0.7
Magnesium (Mg), % 0
1.1 to 1.8
Manganese (Mn), % 0 to 1.5
0 to 0.1
Molybdenum (Mo), % 1.1 to 1.5
0
Nickel (Ni), % 12.5 to 14.5
0
Niobium (Nb), % 0.4 to 1.2
0
Nitrogen (N), % 0.060 to 0.14
0
Phosphorus (P), % 0 to 0.035
0
Silicon (Si), % 0.3 to 0.6
0 to 0.4
Sulfur (S), % 0 to 0.015
0
Vanadium (V), % 0.6 to 0.85
0
Zinc (Zn), % 0
0 to 0.25
Residuals, % 0
0 to 0.15