1045 steel is a commonly used material for sword blades due to its affordability and availability. While it may not possess the same level of performance as higher-grade steels, it can still be suitable for certain types of swords and applications. Here are some key points about 1045 steel for swords:

1. Carbon Content and Hardness: 1045 steel is a medium-carbon steel, typically containing around 0.45% carbon. It provides a good balance between hardness and toughness. After proper heat treatment, it can achieve a hardness of around 50-55 HRC (Rockwell Hardness Scale), which is suitable for functional swords.
2. Edge Retention: Compared to higher carbon steels like 1060 or 1095, 1045 steel may have slightly lower edge retention. However, with proper heat treatment and appropriate sharpening techniques, it can still hold a reasonable edge for cutting and slicing purposes.
3. Toughness: 1045 steel is known for its good toughness, meaning it can absorb impacts and resist deformation without breaking. This toughness allows the sword to withstand regular use and handling.
4. Forgeability: 1045 steel is generally considered to be forgeable, allowing skilled swordsmiths to shape and manipulate the steel during the swordmaking process. It can be forged into different blade profiles and edge geometries.

While 1045 steel may not offer the same level of performance or edge retention as higher-end steels, it can still be a suitable choice for entry-level or beginner swords, decorative or display swords, or swords used for practice and light cutting. It is important to note that the overall quality and performance of a sword depend not only on the type of steel used but also on the craftsmanship, heat treatment, and other factors involved in the swordmaking process.

If you are considering purchasing or commissioning a sword made of 1045 steel, it is advisable to consult with experienced swordsmiths, reputable manufacturers, or knowledgeable enthusiasts who can provide insights into the specific construction, heat treatment, and craftsmanship to ensure the quality and performance of the sword meets your expectations.