Heat Treatment Chemicals

Range :

• Hard Temp H 402 : A carburising salt containing sodium cyanide and suitable activating agent. The carburising salt is capable of carburising mild steel and alloy case hardening steel upto depth of 2.5 mm. Working Range : 760° to 950° C
• Hard Temp F 750 : A salt specially developed for hardening high carbon steel files and medium or low carbon steel rasps. Slight decarburisation on the surfaces of the files can be removed by hardening in Hard Temp F 750. Working Range: 750° to 850° C.
• Hard Temp CN2 : A regenerator salt used in Hard Temp CN4 bath.
• Hard Temp CN4 : A specially designed base salt for nitriding of carbon steels, high speed steels and other type of alloy steels. Hard Temp CN2 salt is required to regenerate the bath. Working Range : 560° – 570° C.
• Additive 408 : An additive used in nitriding baths.

INTRODUCTION
It is an anti-carburising compound used while masking of selected areas component where carbon penetration is not desired. It works very effectively for the surfaces of the components where masking compound is applied during process of carburising

METHOD OF APPLICATION
Masking compound which can be easily applied on the chosen areas by brushing, dipping or by spraying. Normally a uniform layer obtainable by single coat application. Two coats of this compound is recommended where case depth for carburising is more.

TYPES OF MASKING COMPOUND
A) Non Aqueous Masking Compound.
This is a quick drying masking compound which is very stable and also effective in preventing carbon penetration on selected surfaces.

B) Water Based Masking Compound
This is a stable and eco-friendly masking compound easily applicable for prevention of carbon penetration as required.

ADVANTAGES
1) Simple in application by brushing, dipping or spraying.
2) Quick drying in a well ventilated area.
3) Stable and eco-friendly in use.
4) No risk of cracking on uniform coating during process of heat treatment
5) Very much cost effective.

Range :

• Hard Temp 660 : A neutral salt normally used with Hard Temp A 453 regenerator for hardening tool steel and selectively carburised steel. Also used for preparing initial melts of carburising salts Hard Temp H 402. The salt can be used for preheating hot die steels and high speed steels prior to hardening. Working Range: 660° to 900°C (upto 1000 0C if covered with Hard Temp E 452)
• Hard Temp 720 : A water-soluble neutral hardening salt normally used with Hard Temp A 453 regenerator for hardening various tool steels and selectively carburised steels. Sometimes it is also used with 1 – 10% sodium cyanide as a scale free heat treatment medium. Working Range: 720° to 900° C (upto 950° C if covered with Hard Temp E 452)
• Hard Temp 830 : The salt is used with Hard Temp A 453 regenerator for hardening chromium rust resisting steels B. S. En 36 A-D and B.S. En 57.Working Range: 830° to 1100° C
• Hard Temp 970 : Used for heating high-speed steels and hot work steels to the appropriate hardening temperature without scaling or decarburisation. Working Range: 970° to 1350° C.
• Hard Temp 495 : Used for quenching and secondary hardening of high-speed steels preferably where the temperature required is 500° to 540° C. Working Range: 495° to 700° C
• Hard Temp 540 : Specially developed for quenching high speed steels and hot work tool steels after heating in Hard Temp 970. It is also used for secondary hardening of high-speed tool steels and for tempering. Working Range: 540° to 700° C
• Hard Temp 660 : A neutral salt normally used with Hard Temp A 453 regenerator for hardening tool steel and selectively carburised steel. The salt can be used for preheating hot die steels and high speed steels prior to hardening. Working Range: 660° to 900°C (upto 1000°C if covered with Hard Temp E 452)
• Hard Temp F 666 : A neutral salt for use with Hard Temp F 750.

Range :

• Hard Temp 150 : Used for tempering after hardening. The salt may also be used as a quenching cum transformation bath when austempering jobs heated in muffle furnaces or salt baths. Working Range: 160° to 550° C
• Hard Temp 220 : Used for tempering after hardening. The salt may also be used as a quenching cum transformation bath when austempering jobs heated in muffle furnaces or salt baths. Working Range: 230° to 550° C
• Hard Temp 155 : A heat transfer salt for use in large chemical or oil cracking installation as a heating or cooling medium. Working Range: 155° to 540° C
• Hard Temp 330 : A special heat treatment salt used for specific purpose.
• Hard Temp 160 : A special tempering salt used after hardening. Working Range: 160° to 550° C