... 2)Application:structural steel bar & tool bar 3)We can produce as customer's design Round Steel Rod:Standard: AISI,ASTM,BS ... ,GB Material:Q195,Q215,Q235Specification:12mm--30mmApplication:structural steel bar or as tool steel ... (1045) , SAE J403 , SAE J412 , SAE J414 , UNS G10450 Quality Round Steel Rod