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EN 1.4303 Stainless Steel vs. EN AC-51400 Aluminum

EN 1.4303 stainless steel belongs to the iron alloys classification, while EN AC-51400 aluminum belongs to the aluminum alloys. There are 30 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 1.4303 stainless steel and the bottom bar is EN AC-51400 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190 to 270
71
Elastic (Young's, Tensile) Modulus, GPa 200
67
Elongation at Break, % 13 to 49
3.4
Fatigue Strength, MPa 220 to 320
85
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 77
25
Tensile Strength: Ultimate (UTS), MPa 590 to 900
190
Tensile Strength: Yield (Proof), MPa 230 to 560
120

Thermal Properties

Latent Heat of Fusion, J/g 290
400
Maximum Temperature: Mechanical, °C 940
170
Melting Completion (Liquidus), °C 1420
640
Melting Onset (Solidus), °C 1380
600
Specific Heat Capacity, J/kg-K 480
910
Thermal Conductivity, W/m-K 15
110
Thermal Expansion, µm/m-K 16
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
31
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
110

Otherwise Unclassified Properties

Base Metal Price, % relative 17
9.5
Density, g/cm3 7.8
2.7
Embodied Carbon, kg CO2/kg material 3.2
9.1
Embodied Energy, MJ/kg 46
150
Embodied Water, L/kg 150
1170

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110 to 230
5.6
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 800
110
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
51
Strength to Weight: Axial, points 21 to 32
20
Strength to Weight: Bending, points 20 to 26
28
Thermal Diffusivity, mm2/s 4.0
46
Thermal Shock Resistance, points 13 to 20
8.6

Alloy Composition

Aluminum (Al), % 0
90.5 to 95.5
Carbon (C), % 0 to 0.060
0
Chromium (Cr), % 17 to 19
0
Copper (Cu), % 0
0 to 0.050
Iron (Fe), % 64.8 to 72
0 to 0.55
Magnesium (Mg), % 0
4.5 to 6.5
Manganese (Mn), % 0 to 2.0
0 to 0.45
Nickel (Ni), % 11 to 13
0
Nitrogen (N), % 0 to 0.1
0
Phosphorus (P), % 0 to 0.045
0
Silicon (Si), % 0 to 1.0
0 to 1.5
Sulfur (S), % 0 to 0.015
0
Titanium (Ti), % 0
0 to 0.2
Zinc (Zn), % 0
0 to 0.1
Residuals, % 0
0 to 0.15