We’ve Got Hot Ideas on Heat Treatment & Rubber Curing Salts

Whether you’re looking to toughen steel, cure extruded rubber or provide thermal storage capacity to solar components, Hubbard-Hall is here to help. Our line of heat transfer and heat treat salts are designed to meet a range of needs from annealing and martempering to isothermal quenching. Better still, our team of experts has been helping industry for 170 years. In that time, we’ve met challenge after challenge and can help you solve your problems in the most cost-efficient and effective way possible.

Looking for Proof? Our experts share their tank side stories, via case studies, podcasts, and videos.

Looking for Proof? Our experts share their tank s

Safety is our #1 Priority.

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.

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.

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.

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.


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

ProductType of Heat TreatingMelting PointWorking Range
Quick Temper 275Quenching & Tempering275ºF300º – 1000º F
Quick Temper 300Quenching & Tempering310ºF380º – 1100º F
Quick Temper 430Quenching & Tempering430ºF500º – 1100º F
Quick Temper 275Austempering, Martempering & Isothermal Quenching275ºF300º – 1000º F
Quick Temper 430Austempering, Martempering & Isothermal Quenching430ºF500º – 1100º F
Quick Cure 420Solution Heat Treating & Annealing of Aluminum420ºF500º – 1100º F
Neutral Salt ANeutral Salt Hardening1000ºF1100º – 1750º F
Neutral Salt BNeutral Salt Hardening1200ºF1300º – 1700º F
Neutral Salt BSNeutral Salt Hardening, Self-Rectifying1200ºF1300º – 1700º F
Neutral Salt CNeutral Salt Hardening850ºF925º – 1600º F
Neutral Salt HNeutral Salt Hardening1200ºF1300º – 1900º F
Neutral Salt HBNeutral Salt Hardening1450ºF1500º – 2100º F
Neutral Salt HHNeutral Salt Hardening1600ºF1700º – 2400º F
Neutral Salt HHSNeutral Salt Hardening1750ºF1900º – 2400º F
Quick Cure 275Rubbing Curing, Heat Transfer275ºF300º – 1000º F
Quick Cure 300Rubbing Curing, Heat Transfer310ºF380º – 1100º F
Quick Cure 360Rubbing Curing, Heat Transfer360ºF380º – 1100º F
Quick Cure 420Rubbing Curing, Heat Transfer420ºF500º – 1100º F
Bob's Brain:  Heat Treating

Bob's Brain: Heat Treating

The heart of industry, almost nothing can be manufactured without heat-treating.

We recently caught up with Bob Farrell (Senior Vice President and Technical Director at Hubbard-Hall) and asked him a few questions about the heat-treat market, what he has seen in his 30 years of experience and what lies ahead for manufactures using these applications

Talk to an Expert

Need help deciding which heat treatment is right for you?

Getting the right answer starts with asking the right questions. That’s why we’re here. Let’s talk. 1-866-441-5831