20CrMn alloy structural steel

20CrMn Alloy Structural Steel

20CrMn is an alloy structural steel, which is mainly used for components with high strength and high hardness, as well as medium plasticity and medium-low cold deformation and welding. It has high hardenability and good comprehensive mechanical properties through tempering. With wear resistance and fatigue strength, it is suitable for making heavy-duty parts working in high requirements.

20CrMn-alloy-structural-steel has good processing performance during hot rolling. It is easy to get the intended shape, size, and properties. The annealing process of 20CrMn alloy is mainly divided into three parts: recrystallized annealing, normalizing annealing, and quenching annealing. The spheroidization and degree of deformation of the steel are improved after spheroidization and annealing, and then the further cold deformation or machining will become relatively easy.

20CrMn alloy steel has the advantages of good homogeneity and fine grain size. It has high machinability and good heat resistivity, and has fine cutting performance. The parts fabricated by this alloy steel have excellent mechanical properties, fatigue strength, wear resistance and corrosion resistance. But it cannot be used to fabricate parts that work in a high-temperature environment.

20CrMn alloy structural steel has high strength, good hardenability and excellent plasticity. It is mainly used in heavy-duty parts, such as train wheel and chain wheel, camshaft, gear, shaft and crankshaft, etc. It can also be used to manufacture tools, molds, and other important machinery components. Engineering machinery bed, bulldozer blade and bucket link, electric locomotive sleeper, bucket link and other important machinery parts can also be made of this material.

In sum, 20CrMn alloy structural steel has high hardenability and medium plasticity, which is suitable for making parts that need high strength and wear resistance. Although its temperature resistance is relatively poor, its excellent comprehensive properties and practical performance make it an ideal choice for a wide range of applications.

20CrMn Alloy Structural Steel is a kind of low alloy ultra-high-strength steel with high strength, high toughness, wear resistance and corrosion resistance, which is the most widely used alloy structural steel. It is often used in the production of crusher parts, screws and bolts, oil pumps and cylinders, shafts, axles, springs, drills, machining tools, etc.

The 20CrMn alloy structural steel has high strength, good toughness and good hardenability, which is suitable for gear, crank shaft and connecting rod parts with high load and impact. The ultimate tensile strength can reach 800-1200MPa, the surface 3 layers can reach 900-1000MPa, the fatigue strength after tempering is higher than that after quenching, the impact toughness is more than 40 J/cm, and the fatigue limit is 20-25%.

In addition, 20CrMn alloy structural steel has good cold deformation plasticity, under the condition of hardening, the higher impact toughness can remain, but the strength and plasticity are slightly lower than those of direct hardening steel. The welding performance of 20CrMn alloy structural steel is good, but it is neither suitable for gas welding nor for arc welding. So oxyacetylene welding is often used.

The performance of 20CrMn alloy structural steel is excellent, and it has been used in many fields in our life. Therefore, 20CrMn alloy structural steel has broad application prospects in our social and economic fields.