Introduction

As a mold steel technical expert, I have had extensive experience in working with various types of steels, including HSS and SKH51. In this blog post, I will discuss the key differences between HSS and SKH51, their properties, and their applications.

What is HSS?

High-speed steel (HSS) is a type of tool steel that is used in high-speed cutting tools. It is a combination of several elements, including tungsten, molybdenum, chromium, vanadium, and cobalt. HSS has excellent wear resistance, hot hardness, and toughness, which make it ideal for cutting tools that are subjected to high temperatures and stresses.

Properties of HSS

- High wear resistance\n- High hot hardness\n- High toughness\n- Good machinability\n- Good dimensional stability\n- Good heat treatment response

Applications of HSS

HSS is commonly used in cutting tools, such as drills, end mills, reamers, taps, and broaches. It is also used in saw blades, knives, and other cutting tools that require high wear resistance and toughness.

What is SKH51?

SKH51 is a type of high-speed steel that is equivalent to M2 tool steel in the United States. It is a high-performance steel that is used in cutting tools, such as drills, end mills, and taps. SKH51 contains tungsten, molybdenum, chromium, vanadium, and cobalt, which give it excellent wear resistance, hot hardness, and toughness.

Properties of SKH51

- High wear resistance\n- High hot hardness\n- High toughness\n- Good machinability\n- Good dimensional stability\n- Good heat treatment response

Applications of SKH51

SKH51 is commonly used in cutting tools, such as drills, end mills, and taps. It is also used in saw blades, knives, and other cutting tools that require high wear resistance and toughness.

Differences between HSS and SKH51

While HSS and SKH51 share many properties, there are some key differences between the two. One of the main differences is the composition of the two steels. HSS contains more cobalt than SKH51, which gives it better toughness and wear resistance. On the other hand, SKH51 contains more tungsten and molybdenum than HSS, which gives it better hot hardness and wear resistance. Another difference between the two steels is their heat treatment response. HSS can be hardened to a higher degree than SKH51, which makes it more suitable for cutting tools that require high wear resistance. However, SKH51 can be tempered to a higher degree than HSS, which makes it more suitable for cutting tools that require high toughness.

Conclusion

HSS and SKH51 are both high-speed steels that are widely used in cutting tools. While they share many properties, there are some key differences between the two, such as their composition and heat treatment response. By understanding these differences, engineers and manufacturers can choose the right steel for their specific cutting tool applications.