FRANK 720 is usually used with FRANK REGENERATOR as a neutral salt which is free from any decarburization tendency and is readily soluble in water. It neither carburizes nor decarburizes steel.
FRANK 660 / FRANK REGENERATOR is used in the above working range for hardening various tool steels also used for preheating, high-speed steels...
FRANK 830 / FRANK REGENERATOR baths are used in the working range 830-1100°C for hardening tools such as 2% carbon 12% Chromium and the various hot-work steels.
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