The Difference Between Stainless Steel Materials 420F And 420J2

The difference between stainless steel materials 420F and 420J2

420J2 stainless steel and 420F stainless steel are both martensitic stainless steel. If we take it seriously, the Japanese standard calls them SUS420J2 and SUS420F. These two types of steel have certain wear resistance and corrosion resistance, and have higher hardness. Their prices are the lower among stainless steels, and they are suitable for working environments with common requirements for stainless steel. Suitable for all types of precision machinery, bearings, electrical appliances, equipment, instruments, meters, transportation vehicles, household appliances, etc. It is mostly used to manufacture parts that are resistant to atmospheric, steam, water and oxidizing acid corrosion.

However, many people do not know much about SUS420J2 stainless steel and SUS420F stainless steel, nor do they know the difference between the two steel types. GNEE Steel made a comparison from the chemical composition, physical performance parameters, mechanical properties, comparison of brands in various countries, and comparison of heat treatment systems and found the following The difference:

The difference between stainless steel materials 420F and 420J2:

SUS420J2 stainless steel is also called 3Cr13 steel. It has a higher hardness after quenching than SUS420J1 (2Cr13) stainless steel, and its strength and hardenability are also better than SUS420J1 stainless steel. However, its cold working performance and welding performance are relatively poor. It should be heat treated immediately after welding to prevent cracking. It has good cutting performance in the annealed state and is mainly used as cutting tools, nozzles, valve seats, valves, etc.

SUS420F stainless steel is a steel type that increases the sulfur to more than 0.15% and the phosphorus to less than 0.060% on the basis of SUS420J2 stainless steel, thereby improving the easy cutting performance. It also has the atmospheric corrosion resistance and weak acid corrosion resistance of SUS420J2 stainless steel. However, welding Poor sex. Mainly used for parts and standard parts processed by automatic lathes, such as bolts, nuts, etc.