Basis of Presentation	12 Months Ended
Dec. 31, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Note 1 - Basis of Presentation Metallus Inc. (the "Company" or "Metallus") manufactures alloy steel, as well as carbon and micro-alloy steel using electric arc furnace ("EAF") technology. Metallus' portfolio includes special bar quality ("SBQ") bars, seamless mechanical tubing ("tubes"), manufactured components, such as precision steel components, and billets. Additionally, Metallus manages raw material recycling programs, which are used internally as a feeder system for our melt operations and allow us to sell scrap not used in our operations to third parties. The Company’s products and services are used in a diverse range of demanding applications in the following end-markets: industrial, which includes industrial equipment, mining, construction, rail, heavy truck, agriculture and power generation; automotive; aerospace & defense; and energy. The SBQ bar, tube, and billet production processes take place at the Company’s Canton, Ohio manufacturing location. This location accounts for all of the SBQ bars, seamless mechanical tubes and billets the Company produces and includes three manufacturing facilities: the Faircrest, Harrison, and Gambrinus facilities. Metallus' production of manufactured components takes place at two downstream manufacturing facilities: Tryon Peak (Columbus, North Carolina) and St. Clair (Eaton, Ohio). Many of the production processes are integrated, and the manufacturing facilities produce products that are sold in all of the Company’s markets. As a result, investments in the Company’s facilities and resource allocation decisions affecting the Company’s operations are designed to benefit the overall business, not any specific aspect of the business. Our annual melt capacity is approximately 1.2 million tons and our shipment capacity is approximately 0.9 million tons. In addition to our internal melt capacity, the Company periodically purchases third party melt to supplement customer demand and leverage our downstream operations. Basis of Consolidation: The Consolidated Financial Statements include the consolidated assets, liabilities, revenues and expenses related to Metallus as of December 31, 2024, 2023 and 2022. All significant intercompany accounts and transactions within Metallus have been eliminated in the preparation of the Consolidated Financial Statements. Use of Estimates: The preparation of these Consolidated Financial Statements in conformity with accounting principles generally accepted in the United States requires management to make estimates and assumptions that affect the amounts reported in the Consolidated Financial Statements and accompanying notes. These estimates and assumptions are reviewed and updated regularly to reflect recent experience. Presentation: Certain items previously reported in specific financial statement captions have been reclassified to conform with current year presentation.

Basis of Presentation

12 Months Ended

Dec. 31, 2024

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Note 1 - Basis of Presentation

Metallus Inc. (the "Company" or "Metallus") manufactures alloy steel, as well as carbon and micro-alloy steel using electric arc furnace ("EAF") technology. Metallus' portfolio includes special bar quality ("SBQ") bars, seamless mechanical tubing ("tubes"), manufactured components, such as precision steel components, and billets. Additionally, Metallus manages raw material recycling programs, which are used internally as a feeder system for our melt operations and allow us to sell scrap not used in our operations to third parties. The Company’s products and services are used in a diverse range of demanding applications in the following end-markets: industrial, which includes industrial equipment, mining, construction, rail, heavy truck, agriculture and power generation; automotive; aerospace & defense; and energy.

The SBQ bar, tube, and billet production processes take place at the Company’s Canton, Ohio manufacturing location. This location accounts for all of the SBQ bars, seamless mechanical tubes and billets the Company produces and includes three manufacturing facilities: the Faircrest, Harrison, and Gambrinus facilities. Metallus' production of manufactured components takes place at two downstream manufacturing facilities: Tryon Peak (Columbus, North Carolina) and St. Clair (Eaton, Ohio). Many of the production processes are integrated, and the manufacturing facilities produce products that are sold in all of the Company’s markets. As a result, investments in the Company’s facilities and resource allocation decisions affecting the Company’s operations are designed to benefit the overall business, not any specific aspect of the business.

Our annual melt capacity is approximately 1.2 million tons and our shipment capacity is approximately 0.9 million tons. In addition to our internal melt capacity, the Company periodically purchases third party melt to supplement customer demand and leverage our downstream operations.

Basis of Consolidation:

The Consolidated Financial Statements include the consolidated assets, liabilities, revenues and expenses related to Metallus as of December 31, 2024, 2023 and 2022. All significant intercompany accounts and transactions within Metallus have been eliminated in the preparation of the Consolidated Financial Statements.

Use of Estimates:

The preparation of these Consolidated Financial Statements in conformity with accounting principles generally accepted in the United States requires management to make estimates and assumptions that affect the amounts reported in the Consolidated Financial Statements and accompanying notes. These estimates and assumptions are reviewed and updated regularly to reflect recent experience.

Presentation:

Certain items previously reported in specific financial statement captions have been reclassified to conform with current year presentation.