CBS 600 is a carburising bearing and gear steel suitable for service up to 600ºF (315ºC.) Double vacuum melting is used to give maximum cleanliness and optimum strength and toughness properties.
CBS 600 is used for bearings, forged gears, shafts and bushings and similar applications where standard 9310 and 8620 grades are insufficiently temperature-resistant.
CBS 600 may be forged from a start temperature between 1800 to 2000ºF (980 to 1090ºC) with finishing temperature being not critical. Air cooling may be satisfactory, but a retarded rate of cooling might be used to prevent strain cracking.
A sub-critical anneal at 1300ºF (705ºC) is suitable to render this grade suitable for further heat treatment.
Further heat treatment, including carburising and hardening and tempering, should be put in the hands of a reliable heat treat organization. A wide range of properties can be obtained with this grade of steel.
The grade may be easily machined in the annealed condition.
Welding of this grade will not be a problem, but welding should be carried out only in the as-forged or annealed conditions.