... in shan dong province,we are specialzing in making carbon steel balls(AISI1010-1015,AISI1045,AISI1085 G28-G1000,2MM-60MM),and ... chrome steel balls(AISI52100 G40-G1000,2MM-60MM) and stainless steel balls(AISI304,316,420,440 G100-1000 ... 1996.through several years development,quality of TAIAN ZHONG RUI steel balls has approved by many countries,it is growing stronger and ...