Steel bars have high yield strength and tensile strength, and can withstand large external forces without deformation or breakage. This high strength property enables them to be used as heavy-load structural components in the fields of construction and machinery manufacturing. For example, in construction, reinforced concrete structures rely on the high strength of steel bars to resist the various loads imposed on the building and ensure the safety of the building.
20/45/C22/C45 steel bar is a high-quality low-carbon steel, which is cold extruded, carburized and hardened steel. In the unheat-treated state, the hardness is ≤156HBS. Normalizing can promote the spheroidization of the steel, refine the large proeutectoid ferrite, and improve the cutting performance of the blank less than 160HBS.
20CrMo is an alloy structural steel containing alloy elements such as chromium (Cr) and molybdenum (Mo). Chromium can enhance the steel's oxidation resistance and corrosion resistance, while molybdenum improves its mechanical properties at high temperatures. This steel has higher strength and hardenability than carbon steel, good plasticity and toughness, good weldability, medium plasticity during cold deformation, and good cutting performance.
It has excellent strength, toughness and wear resistance, high hardenability, no temper brittleness, good weldability, little tendency to form cold cracks, good machinability and cold strain plasticity. Tensile strength σb (MPa) ≥ 885 (90), elongation δ5 (%) ≥ 12, cross-sectional shrinkage ψ (%) ≥ 50, impact energy Akv (J) ≥ 35, impact toughness value αkv (J/cm²) ≥ 98 (10), hardness ≤ 212HB
Steel bar, a fundamental and versatile construction material, is pivotal in a wide range of engineering and building projects. Manufactured from high-quality carbon steel, alloy steel, or stainless steel through hot-rolling, cold-drawing, or forging processes, steel bars come in various forms and specifications to meet diverse application requirements.
