Annealing and hardening

Annealing salts are usually used as part of a 2-salt system in combination with an additive, otherwise decarburization and oxidation will take place with increasing treatment temperature. We are offering two different classes of additives.

The cyanide-free products bind successfully oxygen containing compounds and ensure the inert character of the liquid. They can be used up to a temperature of 1100 °C

The second class of additives gives the melt a certain carbon activity which depends on whose concentration and the nature of the base salt. However, 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 adjusted within closer limits

Base salt

Product Application Working
temp. in °C
GS 230 For quenching and tempering above 300°C 270 – 600
GS 430 For tempering, heating and quenching of steel for which AS bathes are not suitable. 500 – 700
GS 520 Replenisher salt for GS 430 baths.  
GS 540 For heating and annealing. 600 – 950
GS 560 For annealing silver, gold and brass. 600 – 850
GS 660 Nontoxic salt for annealing steel and non-ferrous metals. 750 – 900
GS 670 Pour le réchauffage et le recuit 750 – 1000
GS 750 For heating and annealing. 850 – 1100
GS 960 For heating and annealing. 1050 – 1250

Additive salts for inert annealing ; cyanide-free

Product Application
R 2 For the prevention of decarburization and oxidation in combination with
GS 430, GS 540, GS 670, GS 750
R 3 Nontoxic additive for the prevention of decarburization and oxidation in combination with GS 660.

Additive salts for preventing decarburation

Product Application
C 1 For the prevention of decarburization and oxidation in combination with GS 540, GS 560, GS 660, GS 670, if the carbon content of C 3 is undesirable.
C 3 For the prevention of decarburization and oxidation in combination with GS 540, GS 560, GS 660, GS 670. Contains active carbon to form a bath cover.