T10 steel is not traditionally used for making katana blades. While T10 steel has its own merits, it is not a commonly employed material for crafting traditional Japanese swords.

Traditional katana blades are typically made from a specialized steel known as tamahagane, which is a combination of high-carbon steel and low-carbon steel layers. This layering process provides a blade with a hard cutting edge (called the ha) and a more flexible spine (called the mune), resulting in a blade that is both sharp and resilient.

While T10 steel can offer desirable properties such as high hardness, toughness, and edge retention, it may not possess the specific qualities required for a traditional katana. The manufacturing process and techniques used for crafting katana blades, such as differential hardening and folding, are designed to optimize the blade's performance, including its sharpness, flexibility, and overall cutting ability.

If you are considering a T10 steel katana, it is important to carefully evaluate the quality of the blade's craftsmanship, heat treatment, and overall construction. Additionally, it is crucial to ensure that the blade is created by experienced artisans who understand the nuances of crafting a katana blade from this specific steel type.

If you are seeking an authentic, traditional katana, it is advisable to choose one made from materials and following techniques that align with the historical practices.