钢材 (gāng cái) literally combines 钢 (gāng), meaning 'steel', and 材 (cái), meaning 'material' or 'raw material'. Together, it refers specifically to steel in its processed industrial forms—such as bars, beams, sheets, pipes, and rods—used in construction, manufacturing, and engineering. Unlike the general term 钢 (gāng), which can refer to the metal element or molten steel, 钢材 emphasizes the tangible, ready-to-use products derived from steelmaking.

This word is commonly used in economic reports, construction contracts, logistics, and industrial contexts. It appears frequently in news about infrastructure projects, import/export statistics, and factory production plans. While 钢铁 (gāngtiě, 'steel and iron') is a broader category that includes both iron and steel products, 钢材 is narrower and strictly denotes finished steel materials—not raw ore, pig iron, or scrap.