Duralys©

Eastern Standard introduces Duralys© Interior Surface Technologies, an advanced internal barrel engineering solution developed to overcome the structural limitations of conventional nitrided and bimetallic barrels. Unlike traditional surface hardening methods that only affect a shallow layer or rely on coating adhesion, Duralys© restructures the internal surface to create a homogeneous and stable wear-resistant zone that extends beyond the superficial layer. Plastic processing barrels operate under continuous friction, thermal cycling, high pressure, and increasingly abrasive filler content. Standard barrels show rapid wear, nitrided systems lose effectiveness due to limited hardening depth, and bimetallic liners may risk delamination or fracture under thermal stress.Duralys© eliminates these structural weaknesses by creating a gradual and controlled hardness distribution with predictable wear behavior, maintaining screw–barrel tolerance integrity over extended production cycles. The Duralys© product family consists of two complementary solutions: Duralys© S – Balanced hardness (1,400–1,700 HV), effective depth 0.10–0.18 mm, optimized for general plastics and moderate abrasive fillers. Duralys© T – Reinforced structure (1,600–1,900 HV), effective depth 0.18–0.30 mm, developed for high glass fiber and mineral-filled compounds. Both systems provide stable hardness continuity, high internal surface stability in long-cycle operations, and eliminate the peeling risks associated with coating systems.