Guaranteed Hardenability Structural Steel 45H

Introduction

45H steel is a martensitic steel that has superior toughness and wear resistance due to its high hardness. 45H steel is primarily used in applications where high strength is needed, such as in components of automotive transmissions, medical equipment, and tool and die production. The primary benefit of this steel is that it is able to retain its strength and hardness at extremely high temperatures, making it an ideal choice for parts that must operate in extreme conditions.

Chemical Composition

The chemical composition of 45H steel is as follows: C 0.36-0.42%; Mn 0.25-0.45%; Si 0.25-0.50%; Cr 0.65-0.90%; Ni 0.35-0.45%; Mo < 0.1%; P < 0.03%; S < 0.03%. The steel has a balanced chemical composition, featuring a high chromium content, which gives it its superior wear and corrosion resistance.

Heat Treatment

45H steel is typically heat treated in the following manner: it is preheated at 754°F (400°C), then austenitized at 1040°F (560°C) for 1 hour, and then quenched in oil. Finally, the steel is tempered between 203°F (95°C) and 371°F (188°C) for 2 hours. This heat treatment process helps the steel attain the desired properties of strength and wear resistance.

Mec hanical Properties

The mechanical properties of 45H steel depend largely on the heat treatment process and the material’s exact chemical composition. Generally, the material is found to exhibit good wear resistance, high toughness, good tensile strength, and good impact resistance. The yield strength of 45H steel ranges between 300 MPa and 600 MPa, while the tensile strength is typically between 830 MPa.

Applications

45H steel is primarily used in applications requiring high strength and wear resistance, making it well suited for applications such as:

1. Automotive components

2. Tool and die production

3. Medical equipment

4. Aviation and aerospace parts

5. Oil & gas drilling equipment

Conclusion

45H steel is a martensitic steel that has superior toughness and wear resistance due to its high hardness and balanced chemical composition. By undergoing heat treatment, the steel is additionally able to retain its strength and hardness at extremely high temperatures, making it an ideal choice for many industries requiring high strength and wear resistance. The applications for this steel include automotive components, tool and die production, medical equipment, aviation and aerospace parts, and oil & gas drilling equipment.

45H structural steel is a high-quality steel grade with a hardness of 45HRC and above. It is widely used in various mechanical parts and components, as well as in various manufacturing technologies.

45H structural steel is a type of steel alloy composed of iron, carbon, and other alloy elements. The iron content is generally between 0.45％and 0.90％. In addition, the alloy contains a certain amount of carbon and other alloying elements to reduce the hardness of the steel and increase its toughness.

45H structural steel has high strength, good toughness and wear resistance, excellent processing performance, and easy smelting. In addition, it can be used in a variety of environments, such as underwater, high temperature/pressure, and corrosive media.

45H structural steel has excellent tempering performance, which makes it an ideal choice for applications that require good formability, such as automobile industry parts. It also has excellent weldability and heat treatment properties, making it suitable for a variety of welding technologies.

The high-quality 45H structural steel has good wear resistance and can be hardened to a maximum of 55HRc, which can achieve a high wear resistance. In addition, its hardness can be increased by tempering and quenching processes to increase its wear resistance and durability.

In summary, 45H structural steel is a high-quality steel grade with excellent wear resistance, processability, and weldability. Its excellent wear resistance and quenching process make it an ideal choice for manufacturing various mechanical parts and components.