... : Iron,Chrome,50Mn,60Mn,75Mn,75Mn 1. Low carbon steel ball 2. Low price & High Hardness 3. OEM service accepted 4. ... .2, P: 0.04 max We are a professional steel ball manufacturer.DongSheng Steel Ball manufacturing Co.,LTD. is located in venerable city YunCheng which ... , is one of most prestigious exporters in Yucheng. cast grinding steel ball