GB/T 18254-2002 High-carbon chromium bearing steel 1.Scope This standard specifies the order content,dimension,shape,technical requirements,testing methods,inspection rules,packaging,marking and quality certification. This standard applies to manufacture of bearing ring,steel pipe,rolling elements made by high-carbon chromium bearing steel processed with hot rolled,forged round, steel wire,cold rolled. Continuous casting steel is not recommended to be the material of balls. Upon mutual agreement,it is allowed to supply other types & specification of steel or billet,details should be specified in contract. 2. Normative References GB/T 222 Method of sampling steel for determination of chemical composition and permissible variations for product analysis GB/T 223.3 Methods for chemical analysis of iron, steel and alloy; The diantipyrylmethane phosphomolybdate gravimetric method for the determination of phosphorus content GB/T 223.5 Methods for chemical analysis of iron,steel and alloy The reduced molybdosilicate spectrophotometric method for the determination of acid-soluble silicon content GB/T 223.10 Methods for chemical analysis of iron, steel and alloy－The cupferron separation-chrome azurol S photometric method for the determination of aluminium content GB/T 223.11 Methods for chemical analysis of iron,steel and alloy The ammonium persulfate oxidation volumetric method for the determination of chromium content GB/T 223.18 Methods for chemical analysis of iron, steel and alloy The sodium thiosulfate separation iodimetric method for the determination of copper content GB/T 223.19 Methods for chemical analysis of iron steel and alloy; The neocuproine-chloroform extraction photometric method for the determination of copper content GB/T 223....
