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| Acerinox |
NAS stainless mill expansion has started operations, giving Acerinox a stronger production base in the US stainless steel market. The Spanish stainless steel and high-performance alloys producer said the expansion at North American Stainless in Kentucky began at the start of 2026.
NAS stainless mill expansion will add 308,000 short tons per year of capacity. This lifts the mill’s annual run rate to 1.85mn short tons from its previous 1.54mn st/yr base.
NAS stainless mill expansion had been delayed from the end of 2025 because of crane repair and revamp work at the site. The start-up now gives Acerinox more exposure to a US market it sees as more stable and attractive than Europe.
The project reinforces Acerinox’s investment preference. The company said US finished stainless base prices have been more stable than European prices, which remain affected by severe swings and the historic lows reached in mid-2023.
US Stainless Market Shows Signs of Recovery
US apparent finished stainless demand fell by 11% year on year in the first quarter. However, demand improved by 5% from the previous quarter, supporting Acerinox’s view that US orders have recently strengthened.
US stainless inventories are now 7% below the historical average and appear stabilised. Deliveries have also grown in recent months, suggesting that the market may be moving beyond the weakest part of the cycle.
North American Stainless operated at an 80% utilisation rate in the quarter, excluding the new expansion. That implies quarterly stainless production of around 308,000st.
The expansion gives Acerinox more leverage if US demand continues to recover. Higher capacity at NAS can support customers in appliances, construction, automotive, energy, industrial equipment and infrastructure applications.
The US market also offers a more attractive pricing environment for Acerinox. Compared with Europe, where stainless producers have faced deeper price volatility, the US provides a clearer platform for investment and margin stability.
Aerospace and Gas Turbines Support High-Performance Alloy Outlook
Acerinox’s high-performance alloys division faced weaker demand from oil and gas and chemical processing customers. Geopolitical uncertainty has slowed investment in those sectors, reducing near-term demand for specialty alloys.
However, the company expects stronger aerospace demand to support Haynes International, a key part of its high-performance alloys business. Aerospace remains an important market for nickel-based and specialty alloys used in engines, structures and high-temperature components.
Industrial gas turbines are another potential growth driver. Demand from AI data centres could support turbine investment as power infrastructure becomes a bottleneck for digital expansion.
This matters because AI data centres require reliable electricity, backup generation and grid reinforcement. That can increase demand for high-temperature alloys used in turbine blades, combustion systems and other demanding energy equipment.
Acerinox’s strategy now has two clear pillars. It is expanding stainless capacity in the US through NAS while positioning high-performance alloys around aerospace and energy infrastructure growth.
The Metalnomist Commentary
Acerinox is using the US market as its growth anchor because stainless pricing and demand visibility remain stronger than in Europe. The NAS expansion also shows how specialty metals producers are aligning investment with aerospace, data-centre power demand and more resilient regional markets.
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