SUJ3
Material steel categories: bearing steel
Standard: China GB/T18254-2002
  U.S. ASTM A295: 1998
  International ISO 683-17:1999
  SUJ3 mainly used to manufacture bearing parts such as ball, roller and bearing rings, etc. they are working under a high concentration of alternating load, due to ball bearing rings and pull the contact area between the small, high-speed rotation while also sliding, the friction may be great, so the rolling bearing steel should have a high hardness, wear resistance and fatigue strength of the steel microstructure, chemical composition requirements are very strict, or the use of reduced bearing life generally the moisture content of bearing steel high carbon content, in the 0.95-1.1% range, and the inclusion of certain alloying elements, such as chromium, manganese, etc. and many more bad delivery annealing, quenching before use and low-temperature tempering. SUJ3 bearing steel containing Mn, for the large thickness-shaped objects, wear-resistant, as a bearing. SUJ3 bearing steel is widely used in industry, agriculture, aquaculture, construction, transportation, mining, Wuxi, price, charge and so on.
Chemical Composition (%):
  C :0.95-1 .10
  Mn :0.90-1 .15
  P: ≤ 0.025
  S: ≤ 0.025
  Cr :0.90-1 .20
  Si :0.40-0 .70
  Production methods:
Bearing steel smelting of high quality requirements, the need for strict control of sulfur, phosphorus and non-metallic inclusions content and distribution, because the non-metallic inclusions content and distribution of life on the great influence of bearing steel. The higher the amount of inclusions, the shorter life expectancy. In order to improve the quality of smelting, smelting furnace and has recently been adopted by the ESR, we can use a vacuum smelting, vacuum consumable refining new techniques to improve the quality of bearing steel.