Refractory Tuff Blocks / Pier Blocks
for Heat Treating Companies

TFL’s TUFF BLOCKS have become the standard for many of the major Heat Treating companies in the US today. Many Heat Treaters have found that our TUFF BLOCKS can last two or three times longer in operation than traditional castable piers, pedestals, or steel support rails in car bottom furnaces.

TFL’s pier blocks are made from a specially-formulated refractory castable that is extremely resistant to damage from thermal shock or cycling. Ordinary pier blocks can deteriorate rapidly due to cracking and crumbling caused by extreme variations in temperature over a short period of time. This cycling is typical in most car-bottom or box type heat treating furnaces. With the use of this thermal-shock resistant refractory, TUFF BLOCKS are able to withstand this thermal cycling with relatively minimal damage over the lifetime of the block.

TFL can manufacture the blocks in any size or shape you require. Lifting holes are typically incorporated in our shapes to help you position the blocks in your furnace and change settings for various loads. All TUFF BLOCKS are prefired to 1350° F, which ensures optimal physical properties when in service.