Steam is a byproduct of the wide and heavy plate production process. It is a key form of energy used in many industrial and commercial applications, widely utilized for heating, electricity generation, and cleaning purposes. Q235B wide and heavy plate is a type of carbon structural steel plate belonging to the Q235 series defined by the Chinese standard GB/T 700. Q235B indicates that the material has good plasticity, toughness, weldability, and adequate strength, and is widely used in construction engineering, bridges, ships, vehicle manufacturing, high pressure vessels, and heavy machinery structures. The production process of heavy plates includes billet preheating, rough rolling, finish rolling, cooling, and leveling, covering energy consumption, material consumption, waste treatment, and environmental emissions required during the production process. This dataset is formed by merging data from multiple sources.