| Chemical composition table % | |||||||||
| Grade | Si | Fe | Cu | Mn | Mg | Cr | Zn | Ti | Al |
| 7039 | 0.4 | 0.5 | 1.2-2.0 | 0.3 | 2.1-2.9 | 0.18-0.28 | 5.1-6.1 | 0.2 | rem |
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