10

20CrMo steel is a low-alloy structural steel mainly composed of elements such as carbon (C), chromium (Cr) and molybdenum (Mo). It has high strength, toughness and wear resistance, and is suitable for manufacturing mechanical parts and engineering components, such as shafts, gears, rods, etc. The steel also has good heat resistance at high temperatures, so it is often used in the manufacture of components in high-temperature working environments.

Chemical composition of 20CrMo steel

20CrMo steel is a low-alloy structural steel whose chemical composition is as follows:

Carbon (C): 0.17-0.24%

Silicon (Si): 0.17-0.37- Manganese (Mn): 0.40-0.70%

Fósforo (P): ≤0.035%

Azufre (S): ≤0.035%

Cromo (Cr): 0.80-1.10%

Molybdenum (Mo): 0.15-0.25%

In addition, 20CrMo steel may also contain a small amount of impurity elements, such as copper (Cu), nickel (Ni) and aluminum (Al), but their content is often very low.

These chemical components can provide 20CrMo steel with good strength, toughness and heat resistance, making it suitable for manufacturing various mechanical parts and engineering structures.

Mechanical properties of 20CrM0 steel

The mechanical properties of 20CrMo steel are as follows:

Tensile Strength: ≥885 MPa

Yield Strength: ≥685 MPa

Alargamiento: ≥12%

Impact toughness (Impact Toughness): usually ≥78 J/cm²

Hardness: usually HB 197- (according to different heat treatment conditions)

These mechanical properties indicate that 20CrMo steel has high strength and toughness, and is suitable for applications subject to high load and impact load. Tensile strength indicates the maximum force that a material can withstand during stretching. Yield strength indicates the point at which the material begins to undergo plastic deformation, and elongation indicates the degree of plastic deformation that the material can undergo before fracture. Impact toughness indicates the force of the material to resist fracture.

Physical properties of 20CrM0 steel

The physical properties of 20CrMo steel are as follows:

Densidad: 7,85 g/cm³

Punto de fusión: 1420-1460°C

Thermal conductivity: 46.6 W/(m·K)

Linear expansion coefficient: 12.2 × 10^(-6) /°C (in the range of 20-100°C)

Elastic modulus: 190-210 GPa

Hardness: usually HB 197- (according to different heat treatment conditions)

Tensile degree: ≥885 MPa

Yield strength: ≥685 MPa

Alargamiento: ≥12%

Impact toughness: usually ≥78 J/cm²

These physical properties make 20CrMo steel have good mechanical properties and heat resistance, and are suitable for working environments with high temperature, high pressure and high load. However, it should be noted that the specific physical properties may be affected by heat treatment and processing, so it should be treated and tested according to specific requirements when using.

What are the characteristics of 20CrM0 steel

20CrMo steel has the following characteristics:

Alloy composition: 20CrMo steel belongs to low alloy steel, and its main alloy elements are chromium (Cr) and molybdenum (Mo). The addition of these two elements can improve the hardness, strength and heat resistance of steel.

High strength and hardness: Due to the effect of alloying elements, 20CrMo steel has high yield strength and tensile strength, and has a certain hardness, so that it has good strength and durability under heavy load and high temperature environment.

Good toughness: Although 20CrMo steel has high hardness and strength, it also has good toughness, which can resist impact and vibration loads to a certain extent and increase its service life.

Good processing performance: 20CrMo steel is easy to heat and machine, and has good plasticity and forgeability. It can be formed and processed by heat treatment, forging, rolling and other processes.

Heat resistance and corrosion resistance: Due to the addition of chromium and molybdenum elements, 20CrMo steel has good high temperature resistance and can operate stably for a long time in a high temperature environment. In addition, it also has certain corrosion resistance and performs better in some corrosive media.

In summary, 20CrMo steel has high strength, hardness and toughness, good processing performance, heat resistance and certain corrosion resistance, and is suitable for working environments that withstand high temperature and high strength requirements, such as mechanical parts, auto parts, boilers and petrochemical equipment.

Machinability of 20CrM0 Steel

20CrMo steel has certain cutting performance, but its hardness is high, and the tool wear is relatively large. The following are some characteristics about the machinability of 20CrMo steel:

Cutting performance: 20CrMo steel has good cutting performance and can be used for conventional turning, milling, drilling and boring operations.

Hardness: The hardness of 20CrMo steel is relatively high, usually between 30-35 HRC, which makes it necessary to use carbide tools or coated tools to improve cutting life when cutting.

Effect of heat treatment: If 20CrMo steel is heat treated, the hardness will increase further, which will increase cutting difficulty and tool wear.

Coolant: During the cutting process, the use of appropriate coolant can effectively reduce the cutting temperature, reduce tool wear, and improve the quality of the cutting surface.

Cutting parameters: Selecting the appropriate cutting speed, feed rate and depth of cut is the key to ensure cutting quality and tool life. According to the specific situation, trial cutting and optimized parameter selection can be carried out.

Application of 20CrM0 steel

20CrMo steel is widely used in various industries due to its excellent mechanical properties and heat resistance. The following are some common application areas:

Machinery manufacturing: 20CrMo steel is often used to manufacture high-strength and high-toughness mechanical parts, such as shafts, wheels, connecting rods, pins, etc.

Automobile industry: This steel can be used to manufacture key components such as crankshafts, connecting rods, and camshafts of automobile engines, as well as transmission gears, drive shafts, etc.

Oil and natural gas industry: 20CrMo steel is widely used in oil and natural gas exploration and transportation fields, such as manufacturing oil well pipelines, oil and gas lines, etc.

Energy equipment: This steel is suitable for manufacturing key components of energy equipment such as gas turbines, boilers, and steam turbines.

Pressure vessel: 20CrMo steel has good resistance and can be used in the manufacture of pressure vessels, storage tanks, etc.

Aerospace industry: This steel is often used in the manufacture of key components of aero-engines, such as turbine blades, turbine discs, etc.