What is the typical weight percentage range for metal fiber concentrations used in refractories?

The typical weight percentage range for metal fiber concentrations used in refractories is indeed 1-4 wt percent. This concentration is optimal for enhancing the mechanical properties of refractory materials, such as improving thermal shock resistance, strength, and flexibility. At this range, metal fibers, often made from materials like stainless steel or other alloys, can provide reinforcement without overly compromising the other essential qualities of the refractory material.

Using metal fibers effectively within this range helps ensure that they are well-distributed throughout the refractory matrix, thereby taking advantage of their benefits without leading to issues like clumping or excessive brittleness, which can occur at lower or higher concentrations. The 1-4 wt percent range is particularly favored as it strikes a balance between performance and material integrity, making it the common choice in refractory formulations.