Skip to content
  • roll bonding of dissimilar clad metals
    Roll Bonded Clad Metals
    Combine the advantages of different metals
  • Examples of Spur's roll bonded solutions
    We Roll Solutions
    Spur empowers people to do things they didn't know were possible
  • background image
    "I had an idea.
    Spur delivered a solution."
    C. Hampson, Race Engineer
    Indy Series

Spur smelter products are now exclusively distributed by Pyrotek®

Roll Bonding

Specializing in the direct bonding of aluminum alloys

Roll bonding, also known as roll welding (ROW), is a unique welding process. Two or more metals are guided through a set of rollers that produce extreme pressure. As a result, a metallurgical bond occurs and a new material is formed by the two metals. The high pressure and reduction in thickness produces a uniform bond that is stronger than the weaker material and leaves no room for the galvanic corrosion process to start.

Designs begin by selecting the correct materials for the application. Rather than choosing just one metal with limited advantages and distinct disadvantages, Spur creates a clad with the combined advantages of multiple metals. This provides the ability to mix metals for optimal weight, conductivity, corrosion resistance and cost. Not only can Spur combine metals, but we also have the ability to put material just where it is needed through both inlay and overlay combinations. We specialize in the bonding of aluminum alloys without the need of a low strength interlayer.


two layers of bonded metal

Spur's roll bonding process provides a very uniform and strong connection between dissimilar metals.


multiple clad metal layers

We bond two or more metals together to enable the optimal laminated metal combination for your application.


partial clad bi-metal transitions

Spur has the unique ability to bond metal just where it is needed, with both overlay and inlay metal combinations.


Enhance material properties

In many markets, the ability to create innovative solutions is heavily dependent upon materials properties. Material selection is driven by the optimization of one material property at the trade-off of other properties. Clad materials can deliver multiple optimized material properties for unique applications where weight, electrical conductivity, thermal conductivity and corrosion are an issue. Spur currently serves customers in a wide range of applications and markets.


Combine material properties to save weight, increase corrosion resistance and decrease wear


Transition between dissimilar metal structures


Dissimilar metals transitions for high pressure and temperature applications


Optimize heat transfer without galvanic corrosion


Transition between aluminum, copper and steel without galvanic corrosion

Other Materials

Create optimized clad metals for unique applications

Why Spur?

We Roll Solutions

At Spur we are more than just a clad metal company. We are developers of solutions for your business. We have the ability to turn clad materials into machined parts that solve problems and simplify supply chains. With experience in everything from thermal management to the motorsport industry, Spur can help create solutions in a wide variety of markets. Our team will work with you to develop a plan that will meet your needs. When working with Spur you can count on fast lead times, fair quotes and a quality product specialized for you.

For over 40 years, Spur has been an innovative leader. Our unique bonding process results in high temperature resistance and the ability to directly bond numerous materials including high strength aluminum alloys.

Our Mission:

Create clad metals that empower people to do things they didn't know were possible.

What is a metallurgical bond?

A permanent connection between metals

uniform roll bondline
Bond layer magnified to 180x

A metallurgical bond is a bond of metals characterized by diffusion, alloying, or intermolecular attraction caused by high pressure. This allows dissimilar metals to bond together as one without the risk of harmful galvanic corrosion. With most alloys, Spur’s roll bonding process allows this to occur all while maintaining a bond strength greater than the weaker of the two materials .

Unlike traditional adhesive and fastening methods for joining metals, clad metals have a complete metallurgical bond that results in no increase of electrical or thermal resistance and permanent high strength. In addition, parts can be fabricated utilizing standard machining methods.

Spur's bond:
  • Lowest bond porosity for hermetic and vacuum applications
  • Higher temperature resistance than other Bi-Clads
  • Provides direct bonding of aluminum alloys without a low strength interlayer
  • Greater material thickness flexibility

Example Solutions

dissimilar metal heatsink aluminum stainless clad pipe coupler partial clad bus bar steel to aluminum biclad trailer component bimetal electrical terminal copper aluminum bus connector stainless to aluminum clad pipe flange bimetal transition clad dissimilar metal box lug 6061 series aluminum clad bonded clad bus bar clad pipe flange clad weld ring