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EN 1.4594 Stainless Steel vs. 5251 Aluminum

EN 1.4594 stainless steel belongs to the iron alloys classification, while 5251 aluminum belongs to the aluminum alloys. There are 30 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 1.4594 stainless steel and the bottom bar is 5251 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
68
Elongation at Break, % 11 to 17
2.0 to 19
Fatigue Strength, MPa 490 to 620
59 to 110
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 76
26
Shear Strength, MPa 620 to 700
110 to 160
Tensile Strength: Ultimate (UTS), MPa 1020 to 1170
180 to 280
Tensile Strength: Yield (Proof), MPa 810 to 1140
67 to 250

Thermal Properties

Latent Heat of Fusion, J/g 280
400
Maximum Temperature: Mechanical, °C 820
180
Melting Completion (Liquidus), °C 1450
650
Melting Onset (Solidus), °C 1410
610
Specific Heat Capacity, J/kg-K 470
900
Thermal Conductivity, W/m-K 16
150
Thermal Expansion, µm/m-K 11
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
37
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
120

Otherwise Unclassified Properties

Base Metal Price, % relative 15
9.5
Density, g/cm3 7.9
2.7
Embodied Carbon, kg CO2/kg material 3.2
8.5
Embodied Energy, MJ/kg 45
150
Embodied Water, L/kg 130
1180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110 to 190
5.4 to 27
Resilience: Unit (Modulus of Resilience), kJ/m3 1660 to 3320
33 to 450
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
50
Strength to Weight: Axial, points 36 to 41
18 to 29
Strength to Weight: Bending, points 29 to 31
26 to 35
Thermal Diffusivity, mm2/s 4.4
61
Thermal Shock Resistance, points 34 to 39
7.9 to 13

Alloy Composition

Aluminum (Al), % 0
95.5 to 98.2
Carbon (C), % 0 to 0.070
0
Chromium (Cr), % 13 to 15
0 to 0.15
Copper (Cu), % 1.2 to 2.0
0 to 0.15
Iron (Fe), % 72.6 to 79.5
0 to 0.5
Magnesium (Mg), % 0
1.7 to 2.4
Manganese (Mn), % 0 to 1.0
0.1 to 0.5
Molybdenum (Mo), % 1.2 to 2.0
0
Nickel (Ni), % 5.0 to 6.0
0
Niobium (Nb), % 0.15 to 0.6
0
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 0.7
0 to 0.4
Sulfur (S), % 0 to 0.015
0
Titanium (Ti), % 0
0 to 0.15
Zinc (Zn), % 0
0 to 0.15
Residuals, % 0
0 to 0.15