Weathering Steel Market Report 2026

The weathering steel market size has grown strongly in recent years. It will grow from $1.47 billion in 2025 to $1.58 billion in 2026 at a compound annual growth rate (CAGR) of 7.9%. The growth in the historic period can be attributed to growing demand for low-maintenance steel in construction, increasing use in bridges and infrastructure, early adoption in architectural and art projects, rising popularity of corten-a for structural applications, expansion in heavy machinery components.

The weathering steel market size is expected to see strong growth in the next few years. It will grow to $2.08 billion in 2030 at a compound annual growth rate (CAGR) of 7.2%. The growth in the forecast period can be attributed to advancements in weathering steel alloys, increasing use in sustainable construction projects, rising demand in transportation and industrial applications, growth in customized and specialty weathering steel products, adoption in urban architectural designs and public art. Major trends in the forecast period include enhanced corrosion resistance, increased use in building and construction, rising adoption in transportation infrastructure, expansion in art and architectural applications, growth of specialty weathering steel products.

The expansion of the energy sector is expected to drive the growth of the weathered steel market in the coming years. The energy sector encompasses industries involved in the exploration, production, generation, transmission, distribution, and consumption of energy resources that power economies and societies. This sector is growing primarily due to rising global energy consumption, driven by urbanization and industrial development, which necessitates expanded and upgraded energy infrastructure. The weathered steel market supports this growth by providing corrosion-resistant, durable materials that enhance the lifespan and reduce the maintenance needs of energy infrastructure projects. For example, in June 2025, the U.S. Energy Information Administration (EIA) reported that in 2024, U.S. energy production reached a record 103.3 quadrillion British thermal units (quads), a 1% increase from the previous record set in 2023. As a result, the expansion of the energy sector is driving the growth of the weathered steel market.

Major companies in the weathering steel market are securing funding to support the steel industry's transition toward decarbonization, aimed at improving the sustainability of their operations and developing advanced materials that minimize carbon emissions while ensuring performance and durability. Boston Metal's patented MOE technology employs electricity to convert iron ore into molten steel without generating CO2 emissions. This direct, one-step process is not only environmentally friendly but also adept at processing various grades of iron ore, making it a versatile solution for steel production. For example, in January 2023, ArcelorMittal SA, a Luxembourg-based steel production corporation, received an investment of $36 million in Boston Metal, representing a significant advancement in the steel industry's transition toward decarbonization. This funding is part of a larger $120 million Series C fundraising round aimed at enhancing sustainable steel production technologies. ArcelorMittal intends to lead the decarbonization efforts within the steel industry, which accounts for approximately 7% to 9% of global CO2 emissions from fossil fuels.

In December 2023, Nippon Steel, a Japan-based steel manufacturer and one of the largest steel producers globally, acquired U.S. Steel for $14.1 billion. Through this acquisition, Nippon Steel aims to increase its production capacity in the U.S. and enhance its manufacturing capabilities to address the rising demand for high-quality steel. BlueScope Steel Limited, an Australia-based company, also offers weathering steel. U.S. Steel, a U.S.-based manufacturing firm, developed CORTEN steel, a type of weathering steel that resists corrosion by creating a protective rust layer.

Major companies operating in the weathering steel market report are Arcelor Mittal SA, United States Steel Corporation, Nippon Steel & Sumitomo Metal Corporation, Tata Steel Ltd., Posco India Pvt. Ltd., SSAB AB Corporation, Japan Future Enterprise Steel Corporation, Bluescope Steel Limited, Hebei Iron & Steel Co. Ltd., A. Zahner Company, Metal Sales Manufacturing Corporation, Henan Gang Iron and Steel Co. Ltd., Masteel UK Ltd., Cascadia Metal Ltd., Triton Corp., Amardeep Steel Centre LLP, Steel Dynamics Inc., Ternium SA, TimkenSteel Corp., Voestalpine AG, Wuhan Iron and Steel Group, Baosteel Group Corporation, Taiwan Cement Corporation, Salzgitter AG, Steelscape, Tata BlueScope Steel.

Asia-Pacific was the largest region in the weathering steel market in 2025.North America is expected to be the fastest-growing region in the forecast period. The regions covered in the weathering steel market are Asia-Pacific, South East Asia, Western Europe, Eastern Europe, North America, South America, Middle East, Africa. The countries covered in the weathering steel market are Australia, Brazil, China, France, Germany, India, Indonesia, Japan, Taiwan, Russia, South Korea, UK, USA, Canada, Italy, Spain.

The weathering steel market consists of sales of STM A588, A242, A606-4, and Corten. Values in this market are ‘factory gate’ values, that is the value of goods sold by the manufacturers or creators of the goods, whether to other entities (including downstream manufacturers, wholesalers, distributors and retailers) or directly to end customers. The value of goods in this market includes related services sold by the creators of the goods.

The market value is defined as the revenues that enterprises gain from the sale of goods and/or services within the specified market and geography through sales, grants, or donations in terms of the currency (in USD unless otherwise specified).

The revenues for a specified geography are consumption values that are revenues generated by organizations in the specified geography within the market, irrespective of where they are produced. It does not include revenues from resales along the supply chain, either further along the supply chain or as part of other products.

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