1045 steel is a commonly used carbon steel alloy that is often used in the production of various tools, including swords. It is considered a mid-range carbon steel with a carbon content of around 0.45%. Here are some key characteristics of 1045 steel:

1. Strength and Durability: 1045 steel offers good strength and durability, making it suitable for applications that require moderate to high levels of strength. It is more robust than lower carbon steels but not as hard or wear-resistant as higher carbon steels.
2. Ease of Machining: 1045 steel is relatively easy to machine, making it a popular choice for various manufacturing processes. It can be readily forged, shaped, and heat-treated to achieve desired properties.
3. Balance of Hardness and Toughness: 1045 steel has a balanced combination of hardness and toughness, which allows it to absorb impacts and resist deformation. This balance makes it suitable for applications where both strength and flexibility are required.
4. Edge Retention: While 1045 steel can be hardened and hold a decent edge, it is not as highly regarded for its edge retention compared to higher carbon steels or more specialized sword steels.

When it comes to swords, the choice of steel depends on factors such as the intended use, desired performance characteristics, and personal preferences. While 1045 steel can produce functional swords, it is considered a lower-end steel in terms of its performance compared to higher carbon steels such as 1060, 1095, or specialized sword steels like T10 or L6.

It's important to note that the quality and performance of a sword are not solely determined by the steel used. Factors such as the blade geometry, heat treatment, craftsmanship, and overall design also play crucial roles. If you are considering purchasing a sword made from 1045 steel, it's recommended to assess the overall quality and construction of the sword and consider your specific needs and expectations.