Damascus steel is not inherently bad for swords. However, it's important to consider certain factors when evaluating the suitability of Damascus steel for sword blades:

1. Quality and Craftsmanship: The quality and craftsmanship involved in creating a Damascus steel sword blade are critical. The blade's performance and durability depend on the specific composition of the steel alloys used, the heat treatment process, and the expertise of the swordsmith. It's crucial to ensure that the Damascus steel blade is made by a skilled and reputable swordsmith who understands the intricacies of creating a functional and reliable sword.
2. Material Selection: The specific steel alloys used in the Damascus steel composition play a significant role in the blade's performance. The choice of steel alloys should consider the intended use of the sword and the desired properties, such as hardness, toughness, and edge retention. Proper selection and combination of steel alloys are essential for achieving the desired balance of strength and performance.
3. Heat Treatment: The heat treatment process is crucial for optimizing the properties of the Damascus steel blade. It involves heating and cooling the blade in a controlled manner to achieve the desired hardness, resilience, and other mechanical properties. The quality and precision of the heat treatment process greatly affect the overall performance and strength of the blade.
4. Authenticity and Historical Accuracy: If you are seeking an authentic and historically accurate sword, it's worth noting that traditional Japanese swords, such as katanas, are not typically made from Damascus steel. The use of Damascus steel for swords can deviate from historical practices and may not align with the specific techniques and materials traditionally used.

In summary, Damascus steel can be suitable for sword blades when it is made with high-quality steel alloys, expert craftsmanship, and proper heat treatment. However, it is essential to ensure that the specific Damascus steel blade meets your requirements, intended use, and aligns with historical accuracy if desired. Consulting with experienced swordsmiths or experts can provide valuable guidance when considering a Damascus steel sword.