Aluminium extrusions machined into phone and laptop housings, plus moulded parts - ECMS bare-component segment.
Aluminium is extruded into profiles, cut and CNC-machined into unibody phone and laptop housings, then anodised. Plastic and metal parts are moulded or stamped. Apple-grade enclosures take dozens of machining steps per part.
Enclosures are the biggest ECMS bet by money: Tata Electronics, Foxconn (Yuzhan) and Motherson have large approvals. ECMS pays 7% of extra sales falling to 3% (minimum investment ₹500 Cr). Aluminium extrusion for phone housings was fully imported before Hindalco's approval.
High-precision machining is capital-heavy (thousands of CNC machines) but sticky once qualified by a brand; margins are better than assembly. Extrusion and alloy supply is a small slice but a strategic one.