420 stainless steel, there is no good 304
420 and 304 is not the same type of stainless steel, is 420 stainless iron, nickel containing little, 420 series stainless steel cutter belongs to the material processing of finished products and then quenching hardness is high, the 304 is rust resistant stainless steel material, widely used, the price is slightly more expensive than the 420, at about 20 yuan a kilogram.
Depends on what you used to do, 420 hardness is higher than 304, more suitable for cutting tools and so on; but 304, corrosion resistance is better than 420, if you take into account the problem of rust, 304 better.
