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EN 1.4988 Stainless Steel vs. EN AC-43400 Aluminum

EN 1.4988 stainless steel belongs to the iron alloys classification, while EN AC-43400 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 1.4988 stainless steel and the bottom bar is EN AC-43400 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
80
Elastic (Young's, Tensile) Modulus, GPa 200
72
Elongation at Break, % 34
1.1
Fatigue Strength, MPa 230
110
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 77
27
Tensile Strength: Ultimate (UTS), MPa 640
270
Tensile Strength: Yield (Proof), MPa 290
160

Thermal Properties

Latent Heat of Fusion, J/g 290
540
Maximum Temperature: Mechanical, °C 920
170
Melting Completion (Liquidus), °C 1450
600
Melting Onset (Solidus), °C 1400
590
Specific Heat Capacity, J/kg-K 470
900
Thermal Conductivity, W/m-K 15
140
Thermal Expansion, µm/m-K 16
22

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
32
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
110

Otherwise Unclassified Properties

Base Metal Price, % relative 23
9.5
Density, g/cm3 7.9
2.6
Embodied Carbon, kg CO2/kg material 6.0
7.8
Embodied Energy, MJ/kg 89
150
Embodied Water, L/kg 150
1070

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 180
2.6
Resilience: Unit (Modulus of Resilience), kJ/m3 210
180
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
54
Strength to Weight: Axial, points 23
29
Strength to Weight: Bending, points 21
36
Thermal Diffusivity, mm2/s 4.0
59
Thermal Shock Resistance, points 14
12

Alloy Composition

Aluminum (Al), % 0
86 to 90.8
Carbon (C), % 0.040 to 0.1
0
Chromium (Cr), % 15.5 to 17.5
0
Copper (Cu), % 0
0 to 0.1
Iron (Fe), % 62.1 to 69.5
0 to 1.0
Lead (Pb), % 0
0 to 0.15
Magnesium (Mg), % 0
0.2 to 0.5
Manganese (Mn), % 0 to 1.5
0 to 0.55
Molybdenum (Mo), % 1.1 to 1.5
0
Nickel (Ni), % 12.5 to 14.5
0 to 0.15
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
9.0 to 11
Sulfur (S), % 0 to 0.015
0
Tin (Sn), % 0
0 to 0.050
Titanium (Ti), % 0
0 to 0.2
Vanadium (V), % 0.6 to 0.85
0
Zinc (Zn), % 0
0 to 0.15
Residuals, % 0
0 to 0.15