Phosphor Bronze Wire for Custom Springs & Custom Wire Forms

Please note that we do not sell phosphor bronze or any other materials in raw form. Phosphor bronze wire is a material option for custom springs, etc., manufactured by Peninsula Spring.

Phosphor bronze wire exhibits good physical properties and fair electrical conductivity. Round, square, flat, and special-shaped phosphor bronze wire is ideal for custom springs and custom wire forms, as well as electrical contacts and connectors. The material is also a popular, lower-cost alternative to Beryllium copper for many applications.

To discuss material requirements for your custom manufacturing project, contact Peninsula Spring today.

Nominal Chemical & Physical Properties

  • Cu: 94.0 - 96.0%
  • Sn: 4.0 - 6.0%
  • Minimum tensile strength: psi x 103 105-145
  • Design stress % minimum tensile: 40
  • Modulus of elasticity: psi x 106 15
  • Modulus in torsion: psi x 106 6.25
  • Maximum operating temperature: 200°F (93°C)
  • Rockwell hardness: B98-104

Heat Treating Phosphor Bronze

This material is delivered in pre-tempered condition, and no further hardening can be obtained via heat treating.  However, depending on your application, completed phosphor bronze springs and wire forms will undergo a stress-relieving process.

Manufacturing Custom Phosphor Bronze Springs & Wire Forms

Phosphor bronze is cold worked to the required temper. This material is extremely well-suited to spring and wire form applications that require corrosion resistance and/or electrical conductivity.

Common Trade Names

  • Phos. Bronze
  • UNS C51000
  • ASTM B159
  • ASTM B139
  • QQ-W-321
  • SAE J463

Contact Us for Phosphor Bronze Springs & Phosphor Bronze Wire Forms

Contact Peninsula Spring to discuss your custom requirements. We look forward to working with you!