PRC National Standard Of The Cast Iron Grinding Ball (1)

Release time：2021-10-20

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 producing mould

– 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 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.