SUS420J2 Stainless Steel: High-Hardness Grade for Cutting Tools

420J2 stainless steel is characterized by its high hardness and moderate corrosion resistance, making it suitable for applications requiring wear resistance and strength. Its martensitic structure allows it to be heat-treated to achieve high hardness levels, which is a significant advantage in applications where durability is critical.

 

Advantages:
- High Hardness: The ability to achieve high hardness through heat treatment makes it ideal for cutting tools and wear-resistant applications.
- Good Wear Resistance: Its wear resistance is beneficial in applications where friction and abrasion are prevalent.
- Moderate Corrosion Resistance: While not as corrosion-resistant as austenitic stainless steels, it still offers adequate protection against many corrosive environments.

 

Limitations:
- Lower Toughness: Compared to austenitic grades, 420J2 has lower toughness, which can lead to brittleness under certain conditions.
- Limited Weldability: The high carbon content can make welding challenging, requiring specific techniques and filler materials.