1, corrosion resistance: 304 stainless steel usually has better corrosion resistance and is suitable for application scenarios that require higher standards of hygiene, such as food processing and medical equipment. And 400 series stainless steel corrosion resistance is not as good as 304, but the cost is lower, especially suitable for cost-sensitive and corrosion is not the main consideration of the application.
2, mechanical properties: 400 series stainless steel has better wear resistance and hardness, suitable for the manufacture of knives, cutlery, surgical instruments and other products that require a high degree of hardness and sharpness. 304 stainless steel provides better corrosion resistance and a wider range of applications.
3, cost: 400 series stainless steel usually has an advantage in terms of cost, if the budget is the main concern, 400 series stainless steel more economical choice.