Phosphor bronze is a popular copper alloy, most commonly used for creating springs, bolts, and other durable parts. If you're looking to replace or upgrade this alloy, there are a few other options to consider. Beryllium copper is a similar copper alloy that's known for its high strength and conductivity. Silicon bronze is another popular copper alloy that's highly resistant to corrosion and ideal for marine environments. Aluminum bronze is a harder, more wear-resistant option, while brass is a softer, more malleable option that's great for decorative or artistic purposes. Ultimately, the best alloy for your project will depend on your specific needs, so be sure to do your research before making a decision.