Products » Quenching and Tempering Salts
Group I quench salts are composed of nitrate/nitrite salts for use as steel tempering or quenching media. All are completely water soluble, easily washed and have similar high heat transfer rates and heat capacity. Group I quench salts come standard in a powder form with Pink Dye (for identification purposes) and organic anticake. They are also available without dye and anticake in a briquette form under the Heatbath®/Park Metallurgical trade name PARKETTES.
Group II salts are neutral salts of the chloride family that operate in the higher temperature ranges. They are completely water soluble, thermally stable and highly fluid. They are more hygroscopic than Group I but more stable and non-oxidizing.
Quenching and Tempering Salts
| PRODUCT IDENTITY | MELTING POINT | WORKING RANGE |
GROUP I | ||
| Low Temp Draw Salt | 275 deg F (135 deg C) | 300-1100 deg F (149-593 deg C) |
| Thermo-Quench | 288 deg F (142 deg C) | 300-1100 deg F (149-593 deg C) |
| Marquench | 305 deg F (152 deg C) | 350-1100 deg F (177-593 deg C) |
| Aus-Quench | 354 deg F (179 deg C) | 375-1100 deg F (191-593 deg C) |
| High Temp Draw Salt | 430 deg F (221 deg C) | 480-1100 deg F (249-593 deg C) |
| AL-2 | 500 deg F (260 deg C) | 550-1100 deg F (288-593 deg C) |
GROUP II | ||
| #800 | 850 deg F (454 deg C) | 925-1250 deg F (496-677 deg C) |
| #900 | 920 deg F (493 deg C) | 1000-1300 deg F (538-704 deg C) |
| Uni-Hard® IR | 1020 deg F (549 deg C) | 1100-1700 deg F (593-927 deg C) |
| Cartecsal | 810 deg F (432 deg C) | 850-1750 deg F (454-954 deg C) |
| Wire Annealing | 1050 deg F (565 deg C) | 1100-1700 deg F (593-927 deg C) |
GROUP I SALTS
LOW TEMP DRAW SALT An eutectic mixture offering the lowest melting point (275 deg F) and a wide working range. Formulated per MIL-S-10699-B, Class 1. (275 Parkettes)
THERMO-QUENCH Eutectic mixture with slightly higher but narrower melt range than Low Temp Draw Salt and similar working range. This has been the most widely used quench salt for many years. Formulated per MIL-S-10699-B, Class 1. (290 Parkettes)
MARQUENCH Low-cost quench salt with slightly higher melting point and narrower working range than Low Temp Draw Salt and Thermo-Quench salt. It is as fluid as lower melting salts above 400 deg F offering equivalent quenching and drain off. (330 Parkettes)
AUS-QUENCH Quench salt whose melting point and working range make it particularly suitable for ausquenching / austempering. (350 Parkettes)
HIGH TEMP DRAW SALT Salt mixture particularly suitable for isothermal tempering of steel and certain non-ferrous alloys. (430 Parkettes)
AL-2 A mixture of nitrates in granular form especially formulated as an economical bath for tempering tool steels requiring treatment within its working range. This is a highly fluid bath that offers low dragout because of its fast drainage properties. Applicable where chloride salts are not wanted.
GROUP II SALTS
#800 Working range covers temperatures frequently used in hardening and tempering steel. This product is also used as a high speed quench and draw.
#900 For quenching and tempering steel. #900 is especially suited for oil hardening followed by relatively high draw, since no washing is required between quench and draw. #900 is less hygroscopic than #800 and can be used at higher temperatures. Formulated per MIL-S-10699-B, Class 4A.
UNI-HARD® IR Frequently used as a preheat for tool hardening or as a heating medium for continuous production hardening. Dragout is minimal because of high fluidity. Uni-Hard IR is water soluble and non-hygroscopic. Non-ferrous and precious metals, as well as ferrous alloys, can be treated in Uni-Hard IR.
CARTECSAL Mixture specified and developed for the U.S. Energy Department for processing alloys containing uranium where chloride compounds are objectionable and where cleaning is important.
WIRE ANNEALING SALT (W.A.S.) Chloride and carbonate mixture recommended for annealing non-ferrous materials or for heat treating steel where slight decarburization is not undesirable. W.A.S. is extremely fluid, completely water soluble, neither hygroscopic nor corrosive, but tends to decarburize steel parts at temperatures above 1300 deg. F. Formulated per MIL-S-10699-B, Class 3.