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} |
650 | DF | .~.~ Al-base component {3} |
652 | .~.~.~ Next to Group VIII or IB metal-base component {1} | |
653 | DF | .~.~.~.~> Fe |