SUJ : High Carbon Chromium Bearing Steels

* Standard                     : JIS G4805 - 1990 

 * Equivalent Grades   : SUJ1, SUJ2, SUJ2, SUJ4, SUJ5, ...

SUJ is a kind of high carbon steel whose carbon content is from 0.95%~1.7%.

SUJ has the great properties of bearings, such as wear resistance, toughness, hardness. Its workability and anti-fatigue strength are excellent as well.

SUJ is widely used for the manufacture of plastic molds, ball bearings, steel ball, ball, bushings, shafts, guide rods, guide pins and other mechanical parts.

* Shapes                         :  Round, Hexagon, Flat, Square.

* Surface Finish            :  Hot Rolled, Cold drawn, Chamfered.

* Available size range : 

* Chemical Composition : 

* Mechanical properties :

Tensile strength (kgf/mm²): 1617

Yield strength (kgf/mm²): 1176

Elongation (%): 5

Impact value (J/cm2): 28

Hardness (Hb): 61~64

* Conditions of heat treatment : 

Annealing: 780~830℃ Water Cooling

Hardening: 850~860℃ Oil Cooling

Tempering: 120~160℃