The risk increases considerably as the treatment temperature rises. Depending on the mode of action, additives are divided into two groups.
The cyanide-free products bind successfully oxygen containing compounds and ensure the inert character of the melt. They can be used up to a temperature of 950°C.
The second class of additives gives the melt a certain carbon activity, which depends on both the concentration of the additive and the nature of the base salt. Due to the short treatment times the carbon activity is allowed to vary considerably from the carbon content of the steel and has not to be adjusted within close limits.
As an alternative to the classic GS products, the modern DUROFER® process for hardening being free of decarburization has proven itself in practice. See our Carburizing and Carbonitriding page.
| Product | Application |
| GS 230 | For quenching and tempering above 300 °C. |
| GS 430 | For tempering, heating and quenching of steel for which AS baths are not suitable. |
| GS 520 | Replenisher salt for GS 430 baths. |
| GS 540 | For heating and annealing. |
| GS 560 | Barium free salt for annealing silver, gold and brass (containing cyanide) |
| GS 660 | Non-toxic salt for annealing steel and non-ferrous metals |
| GS 670 | For heating and annealing. |
| GS 750 | For heating and annealing. |
| GS 960 | For heating and annealing, also for saturating a new brick lining |
| Product | Application |
| R2 | For the prevention of decarburization and oxidation in combination with GS430, GS 540, GS 670, GS 750. |
| R3 | Nontoxic additive for the prevention of decarburization and oxidation in combination with GS 660. |
| Product | Application |
| C1 | For the prevention of decarburization and oxidation in combination with GS 540, GS 560, GS 660 and GS 670, if the carbon content of C 3 is undesirable. |
| C3 | For the prevention of decarburization and oxidation in combination with GS 540, GS 560, GS 660 and GS 670. Contains active carbon to form a bath cover |
| Product | Application |
| SCHUPPENGRAPHIT | For covering baths to reduce temperature losses. This product is only scattered in small amounts and can also be used for cyanide-free annealing baths. |
| AKTIVAT | Covering agent to reduce temperature losses. Suitable for baths having a certain carburization activity. |
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