This standard specifies the order contents, dimension, shape, technical requirements, test methods, inspection rules, and packing, marking and quality certificate of the high-carbon chromium bearing steel. 

This standard is applicable to the hot-rolled or forged round steels, wire rods, cold-drawn (cold-rolled) round steels (vertical stripe or disc) and steel pipes that are of high-carbon chromium bearing steel and used for manufacturing bearing ring and rolling body. The continuously cast steel is not recommended to be adopted as the steel for manufacturing steel ball. 

Based on the agreement of both the supplier and the purchaser, steels and steel billets of other varieties and specifications may also be supplied, and the specific requirements shall be noted in the contract. 

FOREWORD I

1  SCOPE 1

2  NORMATIVE REFERENCES 1

3  ORDER CONTENTS 3

4  DIMENSION AND SHAPE 4

5  TECHNICAL REQUIREMENTS 6

6  TEST METHODS 12

7  INSPECTION RULES 15

8  MARKING, PACKING AND QUALITY CERTIFICATE 16

APPENDIX A (NORMATIVE)  STANDARD DIAGRAMS OF HIGH-CARBON CHROMIUM BEARING STEEL 17