Revealing our customers’ strengths since 1943.

At Paulo, we have become one of the leading companies in the heat treating industry by fulfilling a simple, fundamental promise:

We’re here to help you succeed and to help you reveal the true strength in your most important parts and components.

How do we do it?

We’ve built our company from the ground up making sure everything we do meets our customers’ requirements. That means custom-designing systems to trace every order from receiving, through production, and shipment.

It means investing in state-of-the-art heat treating equipment. It means hiring the best and brightest specialists to ensure our processes are as effective and accurate as they can be. But most of all, it means doing whatever it takes to complete your projects – on time, on budget and in spec. Every time.

It’s what we’ve done from the very beginning.

When Ben and Pauline Rassieur founded Paulo in 1943, most manufacturers in St. Louis were handling heat treating in house. They saw an immediate need for commercial heat treating. This was an opportunity to allow manufacturers to focus on their core businesses, while Paulo focused on delivering high-quality heat treating.

And starting from their small converted store with homemade salt baths and second-hand tempering furnaces, they’ve stayed true to this original idea.

Today, the company has nearly 400 employees across five divisions in St. Louis, MO; Kansas City, MO; Murfreesboro, TN; Nashville, TN; and Cleveland, OH.

The third and fourth generations of the Rassieur family are active in day-to-day management of Paulo, working hard to fulfill the original promise to help manufacturers be at their best.

To outsource your treating or handle it in-house?

Download the guide