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EN 1.4938 Stainless Steel vs. EN AC-51500 Aluminum

EN 1.4938 stainless steel belongs to the iron alloys classification, while EN AC-51500 aluminum belongs to the aluminum alloys. There are 29 material properties with values for both materials. Properties with values for just one material (4, 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 1.4938 stainless steel and the bottom bar is EN AC-51500 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
68
Elongation at Break, % 16 to 17
5.6
Fatigue Strength, MPa 390 to 520
120
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 76
26
Tensile Strength: Ultimate (UTS), MPa 870 to 1030
280
Tensile Strength: Yield (Proof), MPa 640 to 870
160

Thermal Properties

Latent Heat of Fusion, J/g 270
430
Maximum Temperature: Mechanical, °C 750
170
Melting Completion (Liquidus), °C 1460
630
Melting Onset (Solidus), °C 1420
590
Specific Heat Capacity, J/kg-K 470
910
Thermal Conductivity, W/m-K 30
120
Thermal Expansion, µm/m-K 11
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
26
Electrical Conductivity: Equal Weight (Specific), % IACS 3.3
88

Otherwise Unclassified Properties

Base Metal Price, % relative 10
9.5
Density, g/cm3 7.8
2.6
Embodied Carbon, kg CO2/kg material 3.3
9.0
Embodied Energy, MJ/kg 47
150
Embodied Water, L/kg 110
1150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 160
13
Resilience: Unit (Modulus of Resilience), kJ/m3 1050 to 1920
190
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
52
Strength to Weight: Axial, points 31 to 37
29
Strength to Weight: Bending, points 26 to 29
36
Thermal Diffusivity, mm2/s 8.1
49
Thermal Shock Resistance, points 30 to 35
13

Alloy Composition

Aluminum (Al), % 0
89.8 to 93.1
Carbon (C), % 0.080 to 0.15
0
Chromium (Cr), % 11 to 12.5
0
Copper (Cu), % 0
0 to 0.050
Iron (Fe), % 80.5 to 84.8
0 to 0.25
Magnesium (Mg), % 0
4.7 to 6.0
Manganese (Mn), % 0.4 to 0.9
0.4 to 0.8
Molybdenum (Mo), % 1.5 to 2.0
0
Nickel (Ni), % 2.0 to 3.0
0
Nitrogen (N), % 0.020 to 0.040
0
Phosphorus (P), % 0 to 0.025
0
Silicon (Si), % 0 to 0.5
1.8 to 2.6
Sulfur (S), % 0 to 0.015
0
Titanium (Ti), % 0
0 to 0.25
Vanadium (V), % 0.25 to 0.4
0
Zinc (Zn), % 0
0 to 0.070
Residuals, % 0
0 to 0.15