Multi-layer material based on expanded graphite reinforced by a metal comprising at least one inner layer (10) of recompressed expanded graphite and two outer metal layers (20), the said recompressed expanded graphite having a density greater than 1.6 g/cm3. The thickness of each outer metal layer (20) is less than one tenth of the total thickness of the multi-layer structure. The outer metal layers (20) are advantageously provided with uniformly distributed pins (21) oriented towards the recompressed expanded graphite inner layer (10), the density of the said pins (21) being greater than 25 per dm2 and their height being greater than 15% of the final thickness of the recompressed expanded graphite inner layer (10). The said pins may be the result of punching of the outer metal layer (20), the wall around the perforated orifice being deformed and in the form of a substantially axisymmetric projection.