Heat Treatment Salts

Hubbard-Hall manufactures molten heat treatment or heat treating salts to serve both the metal treating and rubber curing industries. These molten salts are manufactured using raw materials with the highest purity. Hubbard-Hall’s heat molten heat treat salts are found widely used in the treatment of metal for the following purposes: hardening, annealing, tempering, and isothermal quenching.

Hardening and quenching in molten salt baths offer the following benefits over other hardening and quenching methods:

  • Hubbard-Hall's manufactured heat treating salts provide benefits over other methods of metal treatment and rubber curing.Requires less floor space
  • Faster heating cycles
  • Scale free parts
  • No pitting
  • Reduced part distortion
  • Elimination of quench cracks
  • Easily washed

Neutral Salts

Designed to provide excellent fluidity and great stability, Hubbard-Hall's neutral heat treatment salts are formulated with a balanced mixtures of chlorides. The Neutral Salts highlighted in this section include only 1 non-barium product (neutral salt B). Selection of neutral salts is generally based on operating range.

Quenching and Tempering Salts

This line of heat treatment salts is composed of nitrate-nitrite salts for use as steel tempering or quenching media. All are completely water soluble, easily washed and have similar high-transfer rates and heat capacity.

Rubber Curing Salts

Rubber curing heat treatment salts are a high purity, eutectic mixture of nitrate and nitrite salts. They are formulated specifically for curing extruded rubber profiles at the lowest possible temperature ranges. All chemicals used in these rubber curing salts are water-soluble and do not form any insolubles. Therefore, the solidified salt is easily removed from the surface in a hot water spray rinsing station at the end of the trough just after emerging from the salt trough.

Solution Heat Treating/Annealing of Aluminum

Molten heat treatment salts provide the high degree of temperature uniformity required for the satisfactory heat treatment of aluminum alloys. Hubbard-Hall’s aluminum heat treatment salts are free flowing and high purity products.

Descaling Salts

Molten descaling salts can be used to remove oxide scales from both ferrous and non-ferrous metals. Molten Descaling Salts have the ability to produce clean scale free surfaces that are free of base metal loss, pitting or etching.

Click here to see the Heat Treatment Salt Product and Product Melting Points