# The Basis for Reliability-Based Mechanical Properties of Structural Aluminium Alloys
## 2 Scope of Analysis
### Description of Database  
To quantify the variability of the mechanical properties of aluminium, a large number of uniaxial tensile test data was obtained from various, mostly European, aluminium producers, as detailed in Figure 1. In total, 12524 material test certificates and tensile test results, which included 14 different alloys and 17 different tempers, were gathered and analysed to quantify the variability of aluminium 0.2% proof strength (f\({}_{0}\)), ultimate tensile strength (f\({}_{u}\)), Young's modulus (E), and Poisson's ration (v). Only non-welded aluminium samples were considered.  
\begin{table}
\begin{tabular}{c c c} \hline
**Aluminium Alloys** & **Common Tempers** & **Structural Use in Europe** \\ \hline EN AW-3004 & & NC \\ EN AW-3005 & & NC \\ EN AW-3103 & & NC \\ EN AW-5005/5005A & & NC \\ EN AW-5049 & & NC \\ EN AW-5052 & & NC \\ EN AW-5083 & O/H111, H24, H36, & C \\ EN AW-5383 & H12 \(\mathrm{\SIUnitSymbolMicro H22}\) & C \\ EN AW-5454 & & C \\ EN AW-5754 & O/H111, H12 \(\mathrm{\SIUnitSymbolMicro H22}\)/H34 & C \\ EN AW-6060 & T6 & C \\ EN AW-6061 & T6 & C \\ EN AW-6063 & T6, T66 & C \\ EN AW-6005A & T6 & C \\ EN AW-6082 & T6, T4 & C \\ EN AW-6106 & T6 & C \\ \hline EN AW-7020 & & NC \\ EN AW-8011A & & NC \\ \hline \end{tabular} Key: NC—not common, C—common.  
\end{table}
Table 1: Wrought aluminium alloys to be used in structural applications according to EN 1999-1-1 [15].  
In Figure 1, it can be seen that material test certificates were obtained from a large number of aluminium producers located in 19 different countries. Note that RSA stands for the Republic of South Africa, while test results obtained from various laboratories [5; 9; 10; 11; 12; 29] were labelled as N/A since the country of origin of the producer could not be determined. Most of the material test certificates originated from Norwegian and Italian producers, 61.4% and 26.6%, respectively. Figure 2 represents the distribution of obtained material test certificates without Norwegian and Italian producers. It is visible that producers from other countries amounted to less than 1% of the total number of material test certificates, except for Turkish and French aluminium producers with 3.2% and 2.0% of the total number of material test certificates, respectively. The total number of certificates obtained from laboratory research amounts to 2.5%.  
The distribution of certificates by alloys and tempers is also not uniform, as seen in Figure 3. The highest number of material test certificates is related to three specific alloys: EN AW-6063 (48.6%), EN AW-6082 (24.8%), and EN AW-6060 (16.9%), as can be seen in  
Figure 1: Distribution of obtained material test certificates (tensile test results) by country.  
Figure 2: Distribution of obtained material test certificates (tensile test results) by country excluding Norway and Italy.  
Figure 4. Most of the material test certificates are related to heat-treated and artificially aged aluminium tempers (T6 and T66), as shown in Figure 5. Furthermore, only 6% of test results are related to rolled products (sheets, strips, and plates), while 94% are related to extruded products (profiles, tubes, rods, and bars).  
Figure 3. Distribution of obtained material test certificates (tensile test results) by alloys and tempers.