304 Stainless vs 316 Stainless

304 Stainless vs 316 Stainless

Why do we use 316 Stainless in our non return valve ratflaps and not 304 stainless? You may think that stainless steel is stainless steel. This is not the case stainless steel can rust and become marked with finger prints, grease and become discoloured. The thing that...
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