Round solid long steel
1045/S45C/CK45 round steel refers to solid long steel strips with a circular cross section. Small round steel is often used as steel bars, bolts and various mechanical parts, while large round steel is used to manufacture mechanical parts or as seamless steel pipe blanks.
45#/1045/S45C round steel refers to solid long steel strips with a circular cross section. Its specifications are expressed in millimeters of diameter, such as “50” means round steel with a diameter of 50 mm. 1045/S45C/CK45 round steel is divided into three types: hot-rolled, forged and cold-drawn. The specifications of hot-rolled round steel are 5.5-250 mm. Among them: 5.5-25 mm small round steel is mostly supplied in bundles of straight bars, and is often used as steel bars, bolts and various mechanical parts; round steel larger than 25 mm is mainly used to manufacture mechanical parts or as seamless steel pipe blanks.
Delivery Condition： Hot rolled only/Hot forged/Annealed/ QT/Normalized/Cold drawn
Chemical composition:
Carbon C: 0.42～0.50
Silicon Si: 0.17～0.37
Manganese Mn: 0.50～0.80
Sulfur S: ≤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
Sectional reduction ψ (%): ≥40
Impact energy Akv (J): ≥39
Impact toughness αkv (J/cm2): ≥49 (5)
Hardness: Unheat treated, ≤229HB;
Annealed steel, ≤197HB
Specimen size: The specimen size is 25mm
Surface Condition:
Peeling/ Polishing/ Grand/ Rough turned/Chrome bar
