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Heat Treatment
We’ve Got Hot Ideas on Heat Treatment & Rubber Curing Salts
Need to toughen steel, cure extruded rubber, or boost thermal storage in solar components? Let’s explore how our heat transfer and heat treat salts can help! From annealing and martempering to isothermal quenching, we’ve got the products you need. With over 175 years of industry experience, we’ve seen it all and are here to help you find the most cost-effective and efficient answers to your challenges.
Safety is Our #1 Priority.
Download our Heat Treat Salt Safety Guide to be sure you are doing everything to protect your employees and provide a safe environment.
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Which heat treat salts would work best for you?
Neutral Salts
Designed to provide excellent fluidity and great stability, Hubbard-Hall’s neutral heat treatment salts are formulated with a balanced mixture 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.
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 without base metal loss, pitting or etching.
Solution Heat Treating/Annealing of Aluminum
Molten heat treatment salts provide a 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.
Rubber Curing Salts
Rubber curing heat treatment salts are 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.
Heat Treatment Products
| Product | Type of Heat Treating | Melting Point | Working Range |
| Quick Temper 275 | Quenching & Tempering | 275ºF | 300º – 1000º F |
| Quick Temper 300 | Quenching & Tempering | 310ºF | 380º – 1100º F |
| Quick Temper 430 | Quenching & Tempering | 430ºF | 500º – 1100º F |
| Quick Temper 275 | Austempering, Martempering & Isothermal Quenching | 275ºF | 300º – 1000º F |
| Quick Temper 430 | Austempering, Martempering & Isothermal Quenching | 430ºF | 500º – 1100º F |
| Quick Cure 420 | Solution Heat Treating & Annealing of Aluminum | 420ºF | 500º – 1100º F |
| Neutral Salt A | Neutral Salt Hardening | 1000ºF | 1100º – 1750º F |
| Neutral Salt B | Neutral Salt Hardening | 1200ºF | 1300º – 1700º F |
| Neutral Salt BS | Neutral Salt Hardening, Self-Rectifying | 1200ºF | 1300º – 1700º F |
| Neutral Salt C | Neutral Salt Hardening | 1050ºF | 925º – 1600º F |
| Neutral Salt H | Neutral Salt Hardening | 1200ºF | 1300º – 1900º F |
| Neutral Salt HH | Neutral Salt Hardening | 1600ºF | 1700º – 2400º F |
| Neutral Salt HHS | Neutral Salt Hardening | 1750ºF | 1900º – 2400º F |
| Quick Cure 275 | Rubber Curing, Heat Transfer | 275ºF | 300º – 1000º F |
| Quick Cure 300 | Rubber Curing, Heat Transfer | 310ºF | 380º – 1100º F |
| Quick Cure 360 | Rubber Curing, Heat Transfer | 360ºF | 380º – 1100º F |
| Quick Cure 420 | Rubber Curing, Heat Transfer | 420ºF | 500º – 1100º F |
Our Metal Finishing Experts at your Fingertips — or Tank-Side
Take the first step toward better heat treatment. Schedule your consultation today.