Data Center Steel Supply Tightens
Summary
SSAB and Ryerson report tighter plate supply as data center demand lifts Ryerson's related revenue share from 6% to 9%, while strip steel remains a caveat.
From October 28 to 29, 2026, steelmaker SSAB (SSAAY) and metals service center Ryerson (RYI) said on their third-quarter earnings calls that data center and related power construction was increasing plate demand while mill lead times and material availability tightened.[1][2]
Data center projects draw steel through several channels
Data center steel demand extends beyond the building shell. Projects also require structural steel, electrical enclosures, cooling equipment, tanks, and fabricated components, so the same construction wave can place orders with mills, processors, and service centers at once. Ryerson sits between mills and equipment manufacturers: it buys metal, processes it to customer specifications, and distributes it. When mill lead times lengthen and inventories stay lean, moving material across warehouses can determine whether customers receive components on schedule.
The current change is that orders are growing faster than the supply chain can replenish material. SSAB connected data center and construction demand with a structural plate shortage. Ryerson said some mill tons were already past due and that its teams had to search for material to capture demand.[1][2] The order wave is therefore reaching mill schedules, making material availability a delivery constraint.
Revenue share, volume, and lead times point to the same constraint
Ryerson quantified the strength of this demand. Data center and power generation projects represented an estimated 9% of third-quarter 2026 revenue, up from 6% in the second quarter. Data center volume rose about 65% from the first quarter, spanning power, IT hardware, cooling, and fabrication applications.[2] The growth was not limited to one type of building component.
Ryerson also said mill lead times were extending and inventories were “exceptionally lean,” which made inventory sharing across facilities more valuable.[2] SSAB described a similar direction from the production side but drew a product boundary. Management was more optimistic about plate prices because of structural shortages tied to data centers and construction, while remaining cautious on strip prices because roughly 10 million metric tons of theoretical European idle capacity could restart.[1]
Inventory breadth and available supply gain value
When supply tightens, the control point partly shifts from winning an order to securing the correct material and delivering it on time. Mills with available plate capacity may capture more production demand. Service centers with broad inventories and the ability to transfer metal among warehouses may be better positioned to match supply with cooling, power, and fabrication customers. Project owners face possible equipment delays or replacement purchases at higher replenishment costs.
This remains a product-specific and channel-specific conclusion. The packet supports tightening in plate and some structural steel applications, not a shortage across all steel products. SSAB's warning about possible strip capacity restarts is the counterexample. Investors can test whether the constraint persists by watching plate lead times, past-due mill tons, service-center inventories, and Ryerson's data center and power revenue share.
Companies exposed to the change
- Nucor (NUE): Nucor produces plate and structural steel, and data centers account for about 15% of its enterprise backlog. That exposes it to the same demand chain, but higher shipments still need to translate into durable pricing and profit improvement.
- Reliance (RS): Reliance is a metals service center supplying data center and energy infrastructure projects. Its inventory and processing network may help customers manage material constraints, but the packet does not quantify a distinct earnings benefit.
Sources
[1] Drillr · SSAB (SSAAY) · 2026-10-28 · FY2026 third-quarter earnings call and Q&A summary
[2] Drillr · Ryerson (RYI) · 2026-10-29 · FY2026 third-quarter earnings call
“Data center and power generation projects remain strong drivers of customer demand in the third quarter, representing an estimated 9% of revenues compared to 6% in the second quarter. and our data center volumes increased by approximately 65% in the third quarter of 2026 when compared with the first quarter of this year.”
This article identifies potentially overlooked industry changes and companies. It is not an investment recommendation.