Inner Mongolia GB 45 # round steel round bar 45 # - 45 # round steel manufacturers Liaocheng, Shandong Tiancheng Pipe Co., Ltd. specializing in the production of ductile iron pipe natural, small-caliber seamless steel tubes, seamless steel pipe of large diameter stainless steel pipe, hot dip galvanized steel, various types of steel, can be customized for the user a variety of special specifications and special material seamless steel pipe, timely delivery, quality and cheap, welcome to order 15,063,536,111 15,069,589,959 Ge printed Wu www.sdtcgy.com 

 45 # round steel section of a round solid bar of steel. Mm of diameter, its specifications, such as "50" means that the diameter of 50 mm round bar. 
 45 # round steel into hot rolling, forging and cold drawing three. Hot rolled round steel specifications of 5.5-250 mm. :5.5-25 mm round bar is mostly straight into bundles of supplies, commonly used to make steel bars, bolts and various mechanical parts; greater than 25 mm round steel, mainly used in the manufacture of mechanical parts or seamless steel pipe billet. 

 Chemical composition: 
 Carbon, the C: 0.42 to 0.50 Si Si: 0.17 ~ 0.37 Mn Mn: 0.50 ~ 0.80 SS: ≤ 0.035 phosphorus P: ≤ 0.035 Chromium Cr: ≤ 0.25 Nickel Ni: ≤ 0.25 Copper Cu: ≤ 0.25 
 Mechanical properties: 
 Tensile strength σb (MPa): ≥ 600 (61) yield strength σs (MPa): ≥ 355 (36) elongation δ5 (%): ≥ 16 Reduction of area ψ (%): ≥ 40 impact energy Akv (J ): ≥ 39 impact the toughness the value αkv (J/cm2): ≥ 49 (5) Hardness: heat treatment, ≤ 229HB; annealing steel, ≤ 197HB sample size: sample size is 25mm 
 Inner Mongolia GB 45 # round steel round bar of 45 # - heaven 45 # round steel manufacturers