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1045 round bar is a medium carbon range steel that offers better mechanical properties than 1018 steel and other lower carbon steels. It has good heat treatment response and fair welding characteristics. It can be forged and it is the most common shafting steel in the medium carbon range.. Color Code: Purple/White Stripe Material: Steel Shape: Round Rod Alloy: 1045 Temper: Annealed Diameter: 1.750 (1-3/4 inch) Length: 12 inches Finish: Cold Finished Specifications: AISI 1045 Notes: Length tolerance is (-1/16" / +3/4")