Top Quality 420J2 Stainless Steel Sheet

The 420J2 stainless steel belt is a grade of stainless steel produced according to the American ASTM standard. Japanese standard SUS420J2, new standard 30Cr13, old standard 3Cr13, digital code S42030, euro 1.4028.


The hardness of 420 series steel after heat treatment is about HRC52~55, but the resistance to damage and other aspects of the performance is not very outstanding. The 420 stainless steel is also known as "cutting tool grade" martensite steel because it is easier to cut and polish. Due to its low carbon content (carbon content: 0.16~0.25) and excellent rust resistance, 420 series steels are ideal for the production of diving tools.


420J2 also known as 3Cr13 is martensitic stainless steel, used after quenching and tempering. Compared with 1Cr13 and 2Cr13 steel, it has higher strength, hardness and hardenability, but its corrosion resistance and thermal stability below 700℃ are lower than 1Cr13 and 2Cr13 steel. Cold working performance and welding performance is not good, welding should be immediately after heat treatment to prevent cracking. It has good cutting performance in annealing state.Bar and forging: oil quenching or air cooling at 1000 ~ 1050℃, tempering at 200 ~ 300℃. Plate: 740 ~ 780℃ annealing or high temperature tempering.Smelting and casting process: electric arc furnace, electric arc furnace + electroslag remelting and other smelting methods.


Top quality 420J2 stainless steel sheet.3Cr13 steel is mainly used for manufacturing corrosion-resistant, high-strength, wear-resistant parts and measuring tools, medical instruments, cutting tools and components, such as spring working below 300℃, shaft working below 400℃, bolts, valves, bearings and so on. Because in quenching quenching easy to produce cracks, if the use of air cooling, corrosion resistance will be reduced, therefore, for large surface parts, it is appropriate to use graded quenching. Sometimes cold treatment is required to reduce the residual austenite content in the tissue.

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