C87500 is a cast silicon bronze alloy, primarily composed of copper with approximately 3.5–4.5% silicon. This unique composition provides the material with a combination of strength and corrosion resistance that surpasses many standard copper alloys. Unlike common brasses, C87500 is highly resistant to dezincification and stress corrosion cracking, making it a reliable choice for demanding environments.
C87500 copper tube is widely used in industrial fluid handling systems, marine piping, heat exchangers, and chemical processing equipment. Its excellent weldability allows for secure joint fabrication, while its good formability enables bending and shaping without cracking. Additionally, the alloy maintains its mechanical integrity across a wide temperature range, making it suitable for both high-pressure and high-temperature applications.
| Parameter | Value |
|---|---|
| Standard | ASTM B315 / ASME SB315 |
| Alloy Type | Cast Silicon Bronze |
| UNS No. | C87500 |
| Chemical Composition | Cu: 79.0–83.0%, Si: 3.5–4.5%, Zn: 12.0–16.0%, Pb: ≤0.09%, Fe: ≤0.15% |
| Tensile Strength | 65–75 ksi (450–520 MPa) |
| Yield Strength (0.5% Ext.) | 30–35 ksi (205–240 MPa) |
| Elongation | 15–25% |
| Hardness (HB) | 95–125 |
| Density | 0.303 lb/in³ (8.39 g/cm³) |
| Melting Point | 1830–1860°F (999–1016°C) |
| Thermal Conductivity | 170–200 BTU·in/hr·ft²·°F |
| Electrical Conductivity | 8–12% IACS |
