What is the difference between 304 and 430 stainless?

The main differences between 304 and 430 stainless steel are reflected in their chemical composition, corrosion resistance, magnetism, and application areas: 304 stainless steel contains nickel (8-10%) and higher chromium (18-20%), with excellent corrosion resistance and non-magnetic properties, suitable for food processing and medical devices; 430 stainless steel does not contain nickel and has a low chromium content (16-18%). It is magnetic and cost-effective, and is commonly used in household appliances and decorative materials. ‌‌

Which is healthier?

304 stainless steel is superior to 430 stainless steel in terms of health and safety, especially suitable for food contact and medical fields. 304 stainless steel, due to its higher corrosion resistance and stability, can effectively reduce the risk of harmful substance precipitation, while 430 stainless steel may experience corrosion problems in acidic or high salt environments

 

What is the difference in composition between 304 and 430 stainless steel?

304 stainless steel has a chromium (Cr) content of about 18% -20%, nickel (Ni) content of about 8% -10%, and the rest is mainly iron (Fe) with small amounts of carbon (C), manganese (Mn), silicon (Si) and other elements.
430 stainless steel belongs to ferritic stainless steel, mainly composed of chromium and iron, with chromium content of about 16% -18% and almost no nickel. The rest also contains small amounts of carbon, manganese, silicon, phosphorus, sulfur and other elements.

 

Which one has better corrosion resistance?

The corrosion resistance of 304 stainless steel is significantly better than that of 430, especially in humid, chlorine containing, or acidic environments. If the budget allows and the environment is harsh, priority should be given to choosing 304; If it is a dry, mild environment and requires cost reduction, 430 can be used as an alternative.

 

What is the difference between 304 and 430 stainless steel in application?

304 stainless steel is widely used in food processing equipment, medical devices, chemical equipment and other fields due to its excellent corrosion resistance and good processing performance. For example, kitchen utensils that come into contact with ingredients such as frying pans, steamers, spoons, etc
430 stainless steel: Due to its high hardness and strength, it is suitable for applications that require high pressure, such as range hoods, gas stoves, etc. In addition, due to its low cost, it is also commonly used in products with high appearance requirements, such as some high-value milk pots

 

Processing and welding performance

Processing: 304 stainless steel has good processing performance and is easy to cut, bend, and form. The processing difficulty of 430 stainless steel is slightly higher, especially during deep drawing or bending.
Welding: Both types of stainless steel have good welding performance, but 304 has more stable welding performance.