... , 8620H ,SS400,ST37,15CrMo,20CrMo,35CrMo, cold rolled round bar We are making the round steel bar all the time ,the detail information ... , 50CrVA, 60Si2CrVA 7. hot rolled die steel, bearing steel, carbon tool steel Size: 12mm-250mmMaterial: H13, T8, T9, T10, GCr15 8. cold-drawn round bar/ square ...