Bright hot rolled or forging bars (Round steel bar) or Cold Drawn,Carbon, Alloy Range:5.5mm-25mm; 25-300mm Length:3m-12m Bright Hot Rolled or Forging Bars(Round Steel Bar,Round Bar ) AISI4340 AISI4140Classfications: Cold Drawn,Carbon,HammersRange: 5.5mm-25mm Usage: reinforcing,bolt>25mm Usage:componets,stainlesSTANDARDS: AISI, ASTM,GB,DIN steel solid round bar 4140 42CrMo4 1.7225