The European heavy forging industry (crankshafts, axles, flanges, forged rings, large-tonnage components) operates with a historically concentrated demand structure. The main OEMs in automotive, wind, rail, defence and heavy industry absorb the bulk of the sector's volume. That concentration carries operational advantages and a structural risk that is rarely discussed in committee until it materialises.
Heavy forged product carries economies of scale, certification requirements and homologation cycles that filter the client. Not any industrial company buys large forged parts. They are bought by a reduced set of OEMs with particular volumes and specifications. The forging manufacturer, in turn, invests decades in building relationship, certification and technical capability with that client. Concentration is not a defect: it is a consequence of the industrial model.
The operational advantage of concentration is clear: stable volumes, predictable cycles, deep technical relationship. The hidden consequence is the exposure to the client's trajectory. When one of the main OEMs reduces volume, switches supplier or exits the market, the forging manufacturer suffers a demand fall that its installed capacity cannot absorb without structural imbalance.
The sector has suffered, in recent years, episodes where the decision of a relevant OEM (plant closure, technological transition, change of strategic supplier) has produced cascading effects across the forging manufacturers as a whole. The fall is not spread: it concentrates on the suppliers with the greatest exposure to that client, who watch their revenue mix unbalance in one or two financial years.
The reverse of the pattern is viable and demands time. Forging manufacturers that have maintained structural stability across consecutive cycles have diversified vertically, distributing their capacity across sectors with distinct dynamics: automotive, wind, rail, defence, heavy industry. Diversification does not eliminate cycle exposure, but it cushions the fall when a particular sector contracts.
Three components define a viable vertical diversification in heavy forging. Identification of adjacent sectors where the existing technical capability fits with a lower homologation cost: the equipment required for one sector is usually partially applicable to an adjacent one, which reduces the barrier to entry. Sustained investment in homologation with target clients of the new sector, assuming long cycles before the first order. And construction of the technical and commercial relationship with those clients over years, not over a campaign.
The frequent error consists in attempting to diversify as a response to a fall that has already occurred. Reactive diversification is the most expensive and the least effective. When the main client falls, the manufacturer needs immediate revenue that diversification, by definition, does not provide in the short term. Diversification pays off if it is initiated before the fall, not after.
The executive translation of this pattern has three lines. Explicitly measuring real concentration by client, sector and geography, with exposure analysis and documented contingency plans. Assuming sustained investment in homologation and relationship with clients in adjacent sectors, with a horizon of five to ten years, not of the usual strategic plan. And maintaining discipline over the pace of diversification even when the main client is operating normally, the moment at which internal urgency is lower and the decision is easier to postpone.
Concentration in heavy industrial forging is not weakness: it is the natural form of the sector. Weakness appears when that concentration is assumed to be immutable and diversification is postponed until the cycle in which the fall of a client turns it into urgency. Those who build optionality before needing it survive the cycles. Those who build it during the crisis usually arrive late.