What is stainless steel metal?

Stainless steel is a corrosion-resistant iron alloy, defined by containing at least 10.5% chromium, which forms a passive, self-healing protective layer against rust and stains, making it strong, durable, and versatile for applications from kitchenware to construction. Other elements like nickel, molybdenum, and nitrogen are added to enhance properties like toughness, heat resistance, and strength, creating different grades for specific uses.