The open die forging process—traditionally known as smith forging—involves deforming a heated metal workpiece between multiple flat or simply shaped dies that do not fully enclose the material. The operator or an automated manipulator continuously rotates and repositions the metal billet while a massive hammer or hydraulic press applies compressive forces. This allows the metal to expand outward along its width and length while reducing its height. Industry networks analyzing these heavy systems frequently consult the India Metal Forging Market documentation to monitor infrastructure expansions and capital investments.

This process is fundamentally geared toward manufacturing massive, heavy-duty components. Because the metal is not confined to a specific mold, open die forging can accommodate workpieces weighing anywhere from a few pounds to several hundred tons. Common shapes produced include massive shafts, long cylinders, hollow tubes, rings, and simple block configurations.

A key benefit of open die forging is the profound structural improvement it offers to large steel ingots. As the hammer strikes the metal, it breaks down the coarse cast grain structures, closes internal porosity or micro-voids, and creates a dense, aligned grain flow along the length of the component. This dramatically increases the material's impact strength, toughness, and resistance to structural fatigue under heavy loads.