SUJ2 Steel Equivalent, Composition, Properties, Hardness

SUJ2 Bearing Steel

SUJ2 steel is a Japanese JIS standard high carbon chromium bearing steel grade. After heat treatment, it has high and uniform hardness, good dimensional stability and corrosion resistance, but the weldability is poor.

SUJ2 material is used to make various bearing rings and rolling elements, such as steel balls, tapered rollers, cylindrical rollers, spherical rollers, needle rollers, etc. It can also be used to manufacture molds, precision measuring tools, etc.

Data Sheet & Specification

SUJ2 Steel Steel Chemical Composition

The chemical composition of SUJ2 bearing steel are displayed in the following table.

SUJ2 Steel Chemical Composition %
Standard Steel Grade C Si Mn P ≤ S ≤ Cr Ni ≤ Mo ≤ Cu ≤
JIS G4805 SUJ2 0.95-1.10 0.15-0.35 ≤ 0.50 0.025 0.025 1.30-1.60 0.25 0.08 0.25

Note: The Cu content of the wire rod shall be 0.20% or less.

SUJ2 Steel Mechanical Properties

Spheroidizing annealed hardness

  • SUJ2 Material Brinell hardness: ≤201 HBW
  • Material Rockwell hardness: ≤94 HRB

SUJ2 Equivalent Grades

SUJ2 steel equivalent to ISO, US ASTM AISI SAE, European EN, Germany DIN, British BS, France NF, and Chinese GB standard. (For reference)

SUJ2 equivalent grades
Japanese USA European China ISO
Standard Grade Standard Grade Standard Grade (Steel Number) Standard Grade Standard Grade
JIS G4805 SUJ2 AISI SAE, ASTM A295/A295M 52100 EN ISO 683-17 100Gr6 (1.3505) GB/T 18254 GCr15 Steel ISO 683-17 100Gr6 (1.3505)

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