When selecting stainless steel, many buyers focus first on the grade number—304, 316, 420, or 430. However, these numbers represent much more than different material names. Each grade belongs to a specific type of stainless steel with unique mechanical properties, corrosion resistance, hardness, and

Many people choose stainless steel products because of the "stainless" in their name, believing it will never rust. Therefore, when they discover brown rust spots on their stainless steel sinks, spoons, or outdoor railings, they are often surprised and confused: "Did I buy fake stainless steel?"In r