Heat Treatment Salts

The agents used for salt bath heat treatment are generally called "salts". When actual salts and other necessary composition materials are heated continuously, they become liquid. Heat treatment using this heat media is called salt bath heat treatment. Salt bath heat treatment is a practice with a long history, used to effectively bring out specific characteristic in metal materials. Metal heat treatment is applied to automobile, electrical appliance, office appliance, precision machine, aircraft, and atomic energy tools and components. In addition, due to the diverse properties of salts, they are widely utilized as heat exchange media, and chemical reaction media, as well as in optical glass reactions, fuel cells, new energy related materials, and more. Parker Netsushori Kogyo is Japan's main manufacturer of heat treatment salts, meeting the needs of customers with with technology and development capabilities it has cultivated over the years. 写真


Salts are provided in the form of powder or solid which are melted by heating up in the heating cell of salt bath and then used for various applications. Salts are line up to many kinds of salts according to the temperatures applied. The range of temperature extends to 160 - 1300°C.

For heating-up and for isothermal cooling in case of meal heat treatment of steel.
For metal surface treatment; carburizing, nitriding, carbonitriding, nitrocarburizing.
For tempering of light metal.
For heat transfer; vulcanizing, bridging of resin, heat exchanger.
For chemical reaction; ion exchange of glass, fuel cell.  Please contact us


(As the case may be, an addition of stop-off paint for decarburizing is needed) Typical products are listed below.
Middle Temperature Range
To be used for heating bath up to 1100°C without decarburizing, carburizing and oxidizing of high alloy steel.
GS 540 / R2
A 5% addition of stop-off paint R2 is generally aimed.
(Temperature used: 600 - 900°C)
GS 750 / R2
(Temperature used: 850 - 1100°C)
Besides, a series of H-9 to -10 is available.
High Temperature Range
To be mainly used for hardening of high-speed and die steel in the temperature range of 980- 1350°C
(Temperature used: 1100 - 1300°C)
(Temperature used: 1100 - 1350°C)
(Temperature used: 950 - 1350°C)
Besides, a series of H-11 to -13 is available.
Quenching, Tempering and Isothermal Cooling Salts
These are the salts especially well assorted and generally used for quenching, tempering and high temperature tempering of steel, but in addition, there are the fields of application widening the range of use; AS-series and T-series of nitrate salts (160 - 550°C), which are primarily used for tempering, are now used for salt quenching after gas carburizing and austempering of thin plate spring and case iron, etc. Safety by reason of incombustibles as the physical properties of salts under isothermal cooling in the temperature range above the ignition point of quenching oil, as well as a simple cleaning by reason of its water solubility characterize the salts.
For the tempering at high temperature of high-speed, heat resisting steel and die steel.
(Temperature used: 480 - 700°C)
For the tempering of high-speed steel, heat resisting steel and die steel.
(Temperature used: 250 - 700°C)
Nitrate base
To be widely used for isothermal cooling, etc. of quenching, tempering, austerpering, etc.
(Tempering used: 160 - 550°C)
(Tempering used: 240 - 550°C)
For the austempering not including Nitrite.
(Tempering used: 280 - 550°C)
T-3 to -6 series with the same specifications as AS series are also ready for sale.

Metal Surface Treating(Nitrocarburizing, carburizing, nitriding, carbonitriding)

ISONITE process is a nitrocarburizing process which is applicable to all the ferrous metals; it is a fine process that is developed world-widely and applied in every fields of industrial machines such as automobile parts (crankshafts, engine valves, etc.) and metal molds. We have 24 jobbing shops locally taking care of this treatment.
Nitrocarburizing salts applicable to all kinds of ferrous metals and also to the nitrocarburizing materials such as austenitic stainless steel, etc. which are difficult to be treated by gas nitrocarburizing process. It is applicable to nitriding as well.
(Temperature used: 570°C)
NS-1 is used for initial melting and NS-2 for replenishment.
Nitrocarburizing process using innoxious cyanate as the main ingredient. The derivative technology by warm bath quenching such as SQ, SQP, QPQ processes gives, on top of proper efficiency of ISONITE, corrosion resistance which is more than that of hard chrome plating and assumes a black color. (Temperature used: 580°C)
Moreover, ISONITE LS process has been developed which makes low temperature treatment possible.
Carbonitriding Salts
With thin case depth of less than 0.1mm and very high hardness, it is used for small or thin workpieces. (Tempering used: 650 - 850°C)
(70%:30%) (Temperature used: 800 - 860°C)
Carburizing Salts
90%:10% Applicable even to steel hard to carburize and suitable for marquench in nitrate acid bath.(Temperature used: 850 -930°C)
C5/C3 GS540/60%:34%:6%
Uniform amount of carbon can be obtained to the carburized depth of 1.2mm of the parts made of carbon steel and case hardening steel.(Temperature used: 980 - 1000°C)
Consisting of completely cyanide-free base salt with sodium carbonate as a chief ingredient and additive with mainly carbon. By furnishing with an agitator, the usual salt bath furnace can be utilized.
CE Constant 50, 80, 110
Highly activated carburizing bath with surface carbon concentration of 0.5%, 0.8% and 1.1% respectively makes carburizing layer with specific and respective surface carbon concentration.(Temperature used: 800 - 950°C)
In addition, C-7R, T

Salt for Light Metals

Exclusive use for normalizing salt bath of all sorts of light metals, provided Mg content is less than approx. 8%.
Special T-6
Exclusive use for normalizing salt bath of all sorts of light metals, provided Mg content is less than approx. 8%.

Heat Transfer

Exclusive use for normalizing salt bath of all sorts of light metals, provided Mg content is less than approx. 8%.
To be widely used as heat media for heat exchanger, vulcanization of rubber, bridging of resin, etc. This salts are non-dangerous articles.(Temperature used: 160 - 550°C)