CARBON STEEL BAR, CHROME PLATED BAR, CHROMATE TREATED BAR. They are commonly used in the machine production as bearing. DIAMETER:Φ20 Φ80mm; STRAIGHTNESS:±0.15mm/m; ROUNDNESS:±0.02mm; CHROME LAYER:0.02mm; MATERIAL:45 STEEL, CARBON STEEL 45 STEEL, CARBON STEEL: Tensile strength: Mpa 600 Yield strength: Mpa 355 Chemical composition(%) 0.42-0.50C,0.17-0.37Si,0.50-0.80Mn,0.035P,0.035S,0.25Ni,0.25Cr,0.25Cu Our carbon steel solid bar and chrome plated bar are widely used in the fields of machine production, electronic equipment, chemical industry, medicine, energy, building and so on. Price:usd920 1000/T,Discount for big quantity.