1. Consider the material's strength and weight. Metal with a higher strength rating will be more durable and weigh less than metal with a lower strength rating.
2. Look for metal that is corrosion resistant. Some metals are more resistant to corrosion than others, so choose one that will be a good fit for your project.
3. Consider the material's price. Some metals are more expensive than others, so consider what you need the metal for before making a decision.