Yes, carbon steel is widely considered a good material for swords due to its desirable properties for blade performance. Carbon steel refers to steel that contains a higher carbon content than other types of steel, which imparts specific characteristics that are advantageous for sword making.

Here are some reasons why carbon steel is favored for sword blades:

1. Strength and Durability: Carbon steel offers excellent strength and durability, allowing the sword blade to withstand the forces and impacts encountered during cutting, thrusting, or combat.
2. Sharpness and Edge Retention: Carbon steel blades can achieve exceptional sharpness and retain their edge for longer periods compared to other types of steel. This is crucial for maintaining the sword's cutting effectiveness.
3. Flexibility: Carbon steel blades can possess a desirable balance of hardness and flexibility. This flexibility helps absorb and distribute impact forces, reducing the risk of blade breakage.
4. Ease of Sharpening: Carbon steel blades are generally easier to sharpen compared to other types of steel, allowing for the maintenance and restoration of the blade's sharpness with appropriate sharpening techniques.

However, it's important to note that not all carbon steels are equal, and the specific composition and heat treatment of the steel can greatly affect the quality and performance of a sword blade. Skilled swordsmiths or reputable manufacturers employ specific grades of carbon steel, such as 1045, 1060, or higher, along with proper forging techniques and heat treatment processes to create high-quality and functional swords.

Regular maintenance, including proper cleaning, oiling, and storage, is important to prevent rust and maintain the longevity of a carbon steel sword blade.

It's worth mentioning that there are also other types of steel used for sword making, such as stainless steel and tool steel, each with their own characteristics and considerations. The choice of steel depends on the intended use of the sword and the specific requirements of the user.