| 75 / | HD | SPECIALIZED METALLURGICAL PROCESSES, COMPOSITIONS FOR USE THEREIN, CONSOLIDATED METAL POWDER COMPOSITIONS, AND LOOSE METAL PARTICULATE MIXTURES |
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| 330 | DF | PROCESSES {9} |
| 392 | DF | .~ Producing or treating free metal {10} |
| 414 | DF | .~.~ At 300 degrees C or greater (e.g., pyrometallurgy, etc.) {7} |
| 433 | DF | .~.~.~ Iron(Fe) {18} |
| 507 | DF | .~.~.~.~ Melting Iron(Fe) or treating molten Iron {12} |
| 571 |  | .~.~.~.~.~ Melting solid Iron(Fe) {4} |
| 572 | DF | .~.~.~.~.~.~> Melting packaged Iron(Fe) or Iron of specified structure to facilitate melting (e.g., shaped bale of scrap, etc.) |
| 573 | DF | .~.~.~.~.~.~> In shaft furnace (e.g., cupola, etc.) {6} |
| 580 | DF | .~.~.~.~.~.~> In closed vessel with heat conducted through walls only (e.g., crucible melting, etc.) |
| 581 | DF | .~.~.~.~.~.~> Melting scrap |