Stål, or steel in English, is a strong and durable alloy primarily made of iron and carbon. It is widely used in construction, manufacturing, and various industries due to its high tensile strength and resistance to corrosion. Different types of steel can be produced by varying the amounts of carbon and other elements, leading to a range of properties suitable for specific applications. The production of stål involves processes such as smelting, where iron ore is heated to extract iron, and then alloying it with carbon. This versatile material is essential for creating structures like buildings, bridges, and vehicles, making it a fundamental component of modern infrastructure.