Stainless steel 304 and 430 difference?

30 stainless steel: the industry called "stainless steel", because it is a ferritic stainless steel, good corrosion resistance, thermal conductivity than austenitic stainless steel. At present, it is mainly used in building decoration, some household appliances, oil burner parts and other room temperature or high temperature scene. But because the chromium content of 430 stainless steel is much less than 304, so the hardness is not as good as 304. such a ferritic stainless steel, the corrosion resistance is not as good as 304 stainless steel at the beginning, and the various performance indicators do not reach the national standard of food grade stainless steel. In either case, 430 stainless steel is not food grade stainless steel at all, more often than not stainless steel is recycled from scrap iron, steel, lead and other materials through a series of processing.30 and 304 stainless steel ≠ food grade stainless steel only meet the national GB9684 standard certification, can really contact with food without causing physical harm to the stainless steel, can be classified as food grade stainless steel. Regular manufacturers generally use 304 (18-8) and 430 (18-0) stainless steel for spork. 30 is magnetic and 304 is slightly magnetic. So when choosing stainless steel cutlery, you can easily judge by magnet. Stainless steel products for food are divided into two categories according to their use. One is cutlery containers, which refers to stainless steel utensils used to hold food, i.e. pots, pans, bowls, basins, and so on. There is also a type of stainless steel cutlery, usually knives, forks, spoons, chopsticks and other utensils that come into direct contact with food. The main safety concern of stainless steel for food contact is the migration of heavy metals. Generally speaking, stainless steel products do not pose a food safety risk during serving, cooking or contact with food. When stainless steel products exceed the migration of heavy metals during use, they may be hazardous to human health.430 stainless steel is not food grade.430 belongs to ferritic stainless steel, which is magnetic and is known as stainless steel. Used to make cutlery such as knives (wear-resistant, hard). At present, the general use of austenitic stainless steel (non-magnetic or slightly magnetic), such as 201202301304 (austenitic good corrosion resistance). So 430 stainless steel is not very safe for tableware because of poor corrosion resistance.30 What is the difference between stainless steel and 304 stainless steel? Food grade stainless steel logo LOGO304 stainless steel and 430 stainless steel comparison:Corrosion resistance:430 stainless steel contains 16.00-18.00% chromium, basically no nickel, 304 stainless steel contains more chromium and nickel, so 430 stainless steel is not as corrosion-resistant as 304 stainless steel. Stability: 430 stainless steel is ferritic, 304 stainless steel is austenitic, 304 stainless steel is more stable than 430 stainless steel. Toughness: 304 stainless steel toughness, stronger than 430 stainless steel. Thermal conductivity: 430 stainless steel is ferritic than 304 stainless steel austenitic has better thermal conductivity. Mechanical properties:430 stainless steel added stable chemical element titanium, the mechanical properties of the weld is better than 304 stainless steel.30 stainless steel applications:30 stainless steel is mainly used for architectural decoration, fuel burner parts, household appliances and domestic appliances.430 steel added with easy-to-cut performance of 430F steel grades, mainly used in automatic lathes, bolts and nuts, and so on. Ti or Nb is added to 430 steel to reduce the C content to 430LX and improve the processing performance and welding performance, which is mainly used for hot water tanks, hot water supply systems, sanitary appliances, household durable appliances, bicycle flywheels and so on. Precision Stainless Steel Tube Pictures 34 Stainless Steel Applications:304 stainless steel is characterized by high temperature resistance, good processing performance and high toughness, and is widely used in the industrial and home furnishing industry, as well as in the food and medical industry.304 stainless steel has a strong corrosion resistance, and is widely used in the manufacture of equipment and parts that require good comprehensive performance (corrosion resistance and formability). Summary:04 stainless steel and 430 stainless steel have their own merits:430 stainless steel has good thermal conductivity and mechanical properties, and performs better in the field of architectural decoration, fuel burner parts, household appliances, home appliances, etc. 304 stainless steel is tough and corrosion resistant, and is better for industries that require corrosion resistance, such as industrial and home furnishing industries, as well as the food and medical industries.