| 420 / | HD | ALLOYS OR METALLIC COMPOSITIONS |
| 580 | DF | CONTAINING OVER 50 PER CENT METAL BUT NO BASE METAL {4} |
| 581 | DF | .~ Iron containing {2} |
| 583 | DF | .~.~ Chromium containing {1} |
| 584.1 | DF | .~.~.~ Nickel containing {2} |
| 585 | | .~.~.~.~ Cobalt containing {1} |
| 586 | DF | .~.~.~.~.~> Titanium, or zirconium containing |