The difference between 409 and 430 stainless steel
409 stainless steel plate shearing plate bending is worse than general low carbon steel due to poor thermal conductivity and low elongation, resulting in large deformation force; 321 stainless steel plate has a strong springback tendency compared with carbon steel during bending; stainless steel plate is relatively Due to the low elongation of carbon steel, the bending angle R of the workpiece during bending is larger than that of carbon steel, otherwise there may be cracks. Because of the high hardness of stainless steel plate, the cold work hardening effect is obvious, so when selecting press bending tools, it is necessary to select tool steel with heat treatment hardness above 60HRC, and its surface roughness is an order of magnitude higher than that of carbon steel press bending tools.
Due to the poor tempering stability of 409 stainless steel, when carbon steel is quenched and tempered, a lower tempering temperature should be selected to ensure higher strength, so that the resistance of the steel is low; in order to ensure better resistance, use high The strength is low at the tempering temperature, so the comprehensive mechanical performance level of carbon steel is not high. After the alloying elements are added to the steel, the basic components of the steel, iron and carbon, will interact with the added alloying elements. The intention of alloying steel is to use the interaction of alloying elements with iron, carbon and the effect on the iron-carbon phase diagram and the heat treatment of the steel to improve the structure and function of the steel.
430 is a ferritic stainless steel, and 430 16Cr is a representative steel grade of ferritic steel, with good thermal expansion rate, excellent formability and oxidation resistance. The surface of the 430 stainless steel plate adheres to organic juices (such as vegetables, noodle soup, sputum, etc.), which will form organic acids in the presence of water and oxygen. Over time, the organic acid will cause certain corrosion to the surface of the 430 stainless steel plate. The surface of 430 stainless steel plate contains acids, alkalis and salts (such as splashing of alkaline water and lime water when decorating walls), which will cause local corrosion. 430 stainless steel plate in polluted air (such as the atmosphere containing a lot of sulfide, carbon oxide, nitrogen oxide), when encountering condensed water, it will form sulfuric acid, nitric acid, and acetic acid liquid points, causing chemical corrosion. All of the above conditions may cause damage to the protective film on the surface of 430 stainless steel and cause rust. Then let's take a look at the rust prevention method of 430 stainless steel plate. It is recommended to clean and scrub the surface of the 430 stainless steel plate in time to remove attachments and eliminate external factors that cause rust; choose a clean, dry and ventilated warehouse to place the 430 stainless steel plate.
430 stainless steel plate application areas:
1. 430 stainless steel is mainly used for building decoration, fuel burner parts, household appliances, and home appliance parts.
2. The steel grade 430F with free cutting performance is added to the 430 steel, which is mainly used for automatic lathes, bolts and nuts, etc.
3. Add Ti or Nb to 430 steel, reduce the C content to 430LX, improve the processing performance and welding performance, mainly used for hot water tanks, hot water supply systems, sanitary appliances, household durable appliances, bicycle flywheels, etc. .
430 stainless steel plate specifications are divided according to thickness:
Thin plate: 0.3-4.0mm thick Small plate is: 1m*2m Large plate is 1.22m*2.44m
Thick plate: 8-100mm thick, can be sawed arbitrarily
430 stainless steel plate has good thermal conductivity and mechanical properties, and 430 stainless steel is better in the fields of building decoration, fuel burner parts, household appliances, and home appliance parts.