Building & Construction
March 17, 2026
Steel Dynamics issues Q1'26 guidance, flags aluminum ramp and higher working capital
Written by Nicholas Bell
Steel Dynamics Inc. (SDI), whose Aluminum Dynamics division operates its flat-rolled aluminum business, provided first quarter 2026 earnings guidance that pointed to higher profitability in its steel segment.
At the same time, the company’s aluminum business is entering a more capital-intensive phase as its Columbus, Miss., flat-rolled mill continues ramping up.
Aluminum ramp begins to show up in cash flow
SDI said working capital increased during the quarter, driven in part by a faster-than-expected ramp in its aluminum operations and higher aluminum prices. As a result, the company slowed its share repurchase activity during the period. This suggests the aluminum segment is requiring greater upfront investment as production increases. In practice, that often includes higher spending on raw materials, inventory buildup and in-process metal as facilities move through commissioning and into steady output.
Concurrently, higher aluminum prices can raise the cost of holding that inventory. This can weigh on near-term cash flow even as production volumes increase and the segment begins contributing positive EBITDA.
Aluminum operations reach early profitability
SDI’s aluminum segment has already begun contributing to earnings, according to commentary from its most recent earnings call.
Management said the aluminum business was EBITDA positive in December on about 10,000 metric tons of shipments with expectations for continued and improving EBITDA through the first half of 2026. This indicates the operation has moved beyond initial startup losses, even as commissioning activity continues across downstream processing lines.
However, profitability remains tied to product mix and throughput levels, which are still developing as additional finishing capacity comes online.
Columbus progresses toward downstream products
The company also said its aluminum team continues commissioning and startup activity at the Columbus mill. SDI noted it has produced finished products for industrial and beverage can applications and received qualifications from several can sheet customers. It has also begun qualifying material for automotive use.
In addition, the company said one of its Continuous Annealing and Solution Heat Treat lines is in commissioning. These lines are used to produce finished automotive sheet, which typically carries higher conversion margins than hot-rolled coil or industrial products.
The sequence indicates the operation is moving beyond early-stage production and into downstream processing. However, full participation in higher-value automotive and coated sheet markets depends on completing those commissioning steps and securing customer approvals.
SDI has also been supplying automotive hot band to other processors while its finishing lines remain under construction. The company expects additional downstream capacity, including Continuous Annealing and Solution Heat Treat lines, to come online in 2026, which would allow a greater share of production to shift toward higher-value finished automotive sheet.
Demand backdrop aligns with target end markets
SDI tied its broader outlook to demand from construction, automotive and industrial sectors. Those same segments align with key end uses for Columbus output, including automotive and general industrial sheet.
The company also pointed to continued strength in nonresidential construction and manufacturing activity. These conditions support demand for common alloy sheet, even as the aluminum segment remains a smaller contributor to SDI’s overall earnings.
Management has also pointed to a domestic aluminum sheet supply deficit of roughly 1.4 million tons, historically met through imports, which have increased in cost following the higher tariffs.
