PRC NATIONAL STANDARD OF THE CAST IRON GRINDING BALLS (1)

This standard is modified with the USA ASTM A532/A532M-93a (2003) ‘Standard specification for wear-resistant cast iron’ and EU standard EN12513:2000N ‘CAST WEAR-RESISTANT CAST IRON’ and other foreign advanced standards of the relevant provisions.

Compared with ASTM A532/A532M-93a(2003), the structure was made more editorial. The main technical contents are revised as follows: 

–Added standard terms and definitions for grinding ball;

–The differences of mechanical properties of different parts of the grinding ball are specified;

—Sample inspection rules have been added;

—Added the requirements of package, mark, and delivery.

This standard replaces GB/T17445-1988 ‘CAST IRON BALLS.’

Compared with GB/T17445-1988, the main technical contents are revised as follows: 

– Reducing the cast iron balls diameter tolerance

– Added the grades of alloyed casting balls

– Altered alloyed casting balls chemical composition

– Martensitic ductile iron grinding ball grade is added;

– Increase the hardness of high chrome contenting alloyed cast iron balls

Appendix A, B, and C of this Standard Are Standard Appendices

This standard is put forward by the national technical committee of foundry standardization (SAC/TC 54)

The responsible drafting unit: JINAN UNIVERSITY

The participating drafting units: Anhui Fengxing wear-resistant Materials Incorporated Company; Jiangxi Copper Industry Group Machinery Manufacturing Co. , Ltd. ; Ma Anshan Yifeng Metallurgical Wear-resistant Materials Development Co. , Ltd. ; Anshan Dongtai Wear-resistant Materials Co. , Ltd. ; Ningguo Dongfang Wear-resistant Materials Co. , Ltd.; Ningguo Chengxin Wear-resistant Materials Co. , Ltd.; Anhui Institute of Mechanical Science

The main drafter for this standard: LI WEI, SONG LIANG, CHEN ZONGMING, HUANG RUQING, LI JIABAO, WANG XIAOFEI, ZHAO JINBIN, TAN ZHAOCHENG

Successive releases of the standards replaced by this standard are as follows:

— GB / T17445-1998.