... hardness:633-66hrc Production name high hardened steel balls for polishingsize2MM-25.4MMGradeG28,G40,G80,G100,G200,G500, ... to customers' requirementApplications1,C10-C15 balls are case-hardened only(surface heat treatment),low carbon steel balls offer considerable ... discuss against when specific order confirmedDelivery timeusually 20 days for one 20ft containeror discuss when order confirmedPort of ...