| 148 / | HD | METAL TREATMENT |
|
| 95 | DF | PROCESS OF MODIFYING OR MAINTAINING INTERNAL PHYSICAL STRUCTURE (I.E., MICROSTRUCTURE) OR CHEMICAL PROPERTIES OF METAL, PROCESS OF REACTIVE COATING OF METAL AND PROCESS OF CHEMICAL-HEAT REMOVING (E.G., FLAME-CUTTING, ETC.) OR BURNING OF METAL {17} |
| 559 | DF | .~ Heating or cooling of solid metal {22} |
| 679 |  | .~.~ Copper(Cu) or copper base alloy {4} |
| 680 | DF | .~.~.~> With working above 400'C or nonspecified hot working {2} |
| 684 | DF | .~.~.~> With working {1} |
| 686 | DF | .~.~.~> With ageing, solution treating (i.e., for hardening), precipitation hardening or strengthening |
| 687 | DF | .~.~.~> Treating with specified agent (e.g., heat exchange agent, protective agent, decarburizing agent or denitriding agent, etc.) or vacuum |