1, material differences: 304 stainless steel belongs to the austenitic type stainless steel, has good corrosion resistance and processing performance, widely used in food, medical and industrial fields 99 yuan a kg, while 440 stainless steel belongs to the ferritic type stainless steel, has a better hardness and abrasion resistance, used in the production of knives and other high-strength products price of 55 yuan a kg, because 304 Stainless steel material performance is more excellent, so the price is relatively high.
2, processing costs: 304 stainless steel processing is relatively more difficult, requiring higher processing technology and equipment, so the processing cost is higher, in addition, the price of 304 stainless steel is also affected by the market supply and demand, the market supply is relatively small, the demand is higher, resulting in higher prices.