| 428 / | HD | STOCK MATERIAL OR MISCELLANEOUS ARTICLES |
| 544 | DF | ALL METAL OR WITH ADJACENT METALS {31} |
| 615 | DF | .~ Composite; i.e., plural, adjacent, spatially distinct metal components (e.g., layers, joint, etc.) {15} |
| 655 | DF | .~.~ Transition metal-base component {4} |
| 657 | DF | .~.~.~ Group IIB metal-base component {1} |
| 658 | ![]() | .~.~.~.~ Zn-base component {1} |
| 659 | DF | .~.~.~.~.~> Next to Fe-base component (e.g., galvanized) |