板坯

Slab is primary semi-finished steel product with a large, flat rectangular shape, designed as the key feedstock for rolling into flat steel products (e.g., hot-rolled coils, heavy plates, cold-rolled sheets). Distinguished from other semi-finished steels (e.g., blooms for sections, billets for bars/wire rods), slabs have characteristic dimensions: typically 150–300 mm thick, 1,000–3,200 mm wide, and 2–12 m long (varies by mill capacity). Its flat geometry enables efficient conversion into wide, thin steel products critical for construction, automotive, and industrial sectors.