Steel alloys are materials made by combining iron with other elements, such as carbon, manganese, or chromium. These additions enhance the properties of steel, making it stronger, more durable, or resistant to corrosion. Different combinations result in various types of steel alloys, each suited for specific applications, from construction to automotive manufacturing. The most common steel alloy is carbon steel, which contains varying amounts of carbon to improve hardness and strength. Other notable types include stainless steel, known for its resistance to rust, and tool steel, designed for making cutting tools. Each alloy's unique characteristics make it valuable in different industries.