Both 201-grade and 304-grade floor drains are made of stainless steel; the key differences lie in their corrosion resistance, durability, suitability for various environments, and price, with significant performance disparities between the two.
In terms of material composition, 304 stainless steel has a higher nickel content and lower manganese content, resulting in greater chemical stability; 201 stainless steel, by contrast, contains less nickel and more manganese, making it more cost-effective but less corrosion-resistant. In terms of rust resistance, 304 floor drains are resistant to acids and alkalis and can withstand humid conditions, so they are unlikely to rust even after prolonged exposure to bathroom water and washwater, making them well suited for kitchen and bathroom areas that experience frequent water use. By contrast, 201 floor drains perform adequately in dry environments, but if exposed to humid conditions over the long term, they are prone to developing yellow stains, rust, and even flaking of the surface layer.
In terms of durability, 304 stainless steel boasts excellent toughness and high strength, making it resistant to deformation and cracking and ensuring a longer service life; in contrast, 201 stainless steel is relatively hard and brittle, with poor impact resistance, which can lead to deformation and blockages over time.
In terms of price, 201-grade floor drains are inexpensive and are often used in temporary projects, rental properties, or dry areas; 304-grade floor drains are more costly but offer superior overall performance, making them the mainstream choice for residential renovations.
In general, for damp environments such as bathrooms and balconies, it is recommended to use 304 floor drains, as they offer greater stability and a longer service life; when budget is limited and the environment is dry, 201 floor drains can be used as a temporary solution.