| 420 / | HD | ALLOYS OR METALLIC COMPOSITIONS |
| 528 | DF | ALUMINUM BASE {7} |
| 529 | | .~ Copper containing {6} |
| 530 | DF | .~.~> Tin containing |
| 531 | DF | .~.~> Zinc containing {1} |
| 533 | DF | .~.~> Magnesium containing {1} |
| 537 | DF | .~.~> Silicon containing |
| 538 | DF | .~.~> Iron, cobalt, or nickel containing |
| 539 | DF | .~.~> Silver containing |