HEAT TREATMENT SALTS & CHEMICALS

  * Quenching, Marqueching &
   Tempering Salts & Oils
  * Case Hardening &
   Carburising Salts
Meprophos Phosphating Chemicals
Meproche Rust Preventives
Meproche Machining Fluids
Meproche Specialty Products 
Meproche Electroplating Salts
Meproche Paint Removers
Nitriding Salts and Fluids
DEHYDRATED SOLVENTS
  * Pyridine
  * Tetra Hydro furan (Upto    20 ppm maxm. moisture)
  * Acetonitrile
  * Di methyl Formamide
 

Heat Treatment Salts and Chemicals

 
(B) Quenching, Marqueching & Tempering Salts & Oils.

Meproche MQ 540 : Working range 540° C to 700° C. Used for quenching and tempering high speed steel and hot working steels used for dies, punches, mandrels etc. after heating in MH 970 / 971. Also used for secondary hardening. When the bath becomes sluggish, and regenerator to keep the bath clean.

Meproche MQ 495 : Working range 495° C to 700° C. Specially developed salt to consume less energy. Has lower melting point. It is used for quenching and austempering.

Meproche MT 150 : Working range 150° C to 270° C. Used for tempering steels after hardening to reduce brittleness in the hardened steels and remove the internal stresses caused by the sudden cooling in the quenching bath. Jobs after cyaniding should not be quenched directly in MT 150 as it reacts violently with cyanides.

Meproche MT 220 : Working range 230° C to 350° C. This salt is very stable and melting point or working range does not change after repeated uses, therefore martempering & isothermal quenching can be carried out very efficiently. It reacts violently with cyanides

Meproche Quenching Oil : Mineral oil based with low viscosity and high oxidation stability. Compounded mineral quenching oils are widely used as they result into good proportion of hardness and toughness and give least warpage with standard steels. 

Meproche Fast Quenching Oil 

a) Appearance Slightly pale. 
b) Moisture Less than 0.1% 
c) Acidity (Organic & Inorganic) Less than 0.01% each.
d) Flash Point 195°C. min.
e) Ash 0.05% max
f) Pour Point Below 5°C.
g) Sap Value 0.2 to 0.5 
h) Specific Gravity 0.85 to 0.86
i) Thermal Conductivity 0.087 to 0.09 BTU/HR/FT deg.F. 
j) Viscosity 35 sec at RT by Ford cup no.4 

Meproche Quenching Oil No.2 

a) Appearance Slightly pale. 
b) Moisture Less than 0.1% 
c) Acidity (Organic & Inorganic) Less than 0.05% each.
d) Flash Point 220°C. min.
e) Ash 0.05% max
f) Pour Point Below 5°C.
g) Sap Value 1 to 8.
h) Specific Gravity 0.892.
i) Thermal Conductivity 0.084 BTU/HR/FT deg.F.
j) Viscosity approx. 80 SUS at 40'C. 

 Meproche Quenching Oil No.3  

a) Appearance Slightly pale. 
b) Moisture Less than 0.1% 
c) Acidity (Organic & Inorganic) Less than 0.05% each.
d) Flash Point 180°C. min.
e) Ash 0.1% max.
f) Pour Point Below 5°C.
g) Sap Value 4 to 8.
h) Specific Gravity 0.892.
i) Thermal Conductivity 0.084 BTU/HR/FT deg.F.
j) Viscosity approx. 80 SUS at 40'C. 


Meproche Martempering Oil : 
Working range 150° C to 280° C
Low viscosity jobs from case carburising by cyanides can directly be quenched in this oil. It avoids use of temporary rust preventives after quenching. Being liquid it is easy to work with.

Meproche Polymer Quenchent : 
This is a synthetic quenchent. Cooling rate is higher than oil & water. Being water soluble it is easy to remove. It is inhibited and hence non corrosive. 

General Specification :   

Appearance Water white liquid 
Specific gravity  app. 1.1
Viscosity  5.4 to 6.4 CST at 100° c.
Oily consistency at RT

Advantages of using polymer quenchent :- 

1) Very low to nil cracking, in spite of high cooling rate.
2) It is duly inhibited to avoid corrosion and cracking.
3) It is much easier to clean, being water soluble.
4) Meproche Polymer Quenchent does not deplete in quality with time, being antioxidant.
5) Evaporation losses are very small, hence consumption is low.