Keyed different single-post shackle padlocks are typically made from a combination of materials to ensure durability, security, and resistance to environmental factors. The main components and their materials are:
1. **Body**: The body of the padlock is often made from materials like brass, stainless steel, or laminated steel. Brass is popular for its corrosion resistance and ease of machining. Stainless steel offers superior strength and corrosion resistance, making it ideal for outdoor use. Laminated steel provides a balance of strength and cost-effectiveness.
2. **Shackle**: The shackle is usually made from hardened steel to resist cutting and sawing. For enhanced security, some padlocks use boron alloy steel, which is even more resistant to cutting and physical attacks. Stainless steel shackles are also used for their corrosion resistance, especially in marine environments.
3. **Locking Mechanism**: The internal locking mechanism, including the pins and springs, is typically made from brass or stainless steel. Brass is used for its smooth operation and resistance to rust, while stainless steel offers durability and corrosion resistance.
4. **Coating/Finish**: To further protect against corrosion and wear, padlocks may have a protective coating or finish. Common finishes include chrome plating, zinc plating, or powder coating, which provide an additional layer of protection against the elements.
5. **Cylinder**: The cylinder, which houses the keyway, is often made from brass or zinc alloy. Brass is preferred for its precision and resistance to corrosion, while zinc alloy offers a cost-effective alternative with reasonable durability.
These materials are chosen to balance security, durability, and cost, ensuring that the padlock can withstand various environmental conditions and physical attacks.