What type of metal is typically used to hold an edge and is highly ferrous?

Martenitic stainless steels are characterized by their high hardness and strength, which are achieved through heat treatment processes that create a specific crystal structure. This type of metal is known for its ability to hold a sharp edge, making it an ideal choice for applications such as cutlery and tools. The presence of significant amounts of carbon in martensitic types contributes to their hardness and capability to be tempered for various levels of durability.

Additionally, martensitic stainless steel is typically ferrous, meaning it contains a significant amount of iron, which is why it is recommended for applications where edge retention is crucial. The properties of martensitic steel allow it to maintain its shape and sharpness under stress, which is particularly valuable in cutting instruments. Therefore, the identification of martensitic steel as the type that holds an edge well and is highly ferrous is accurate and aligns with its known characteristics in the metallurgical field.