CuZn28Sn1
CW706RAdmiralty Brass — 70/28/1 Cu-Zn-Sn. The 1% Sn addition provides excellent resistance to dezincification in seawater and brackish water. THE condenser tube material for power plants and ships. Also known as Admiralty Metal. Used for condenser tubes, heat exchanger tubes, distiller tubes, and marine hardware.
International equivalents
| Flag | Standard | Country | Grade | Number | Match |
|---|---|---|---|---|---|
| 🇺🇸 | UNS | USA | UNS C44300 (Admiralty, arsenical) | C44300 | REF |
| 🇪🇺 | EN | Europe | CuZn28Sn1 | CW706R | 100% |
Sources: ASTM B111, EN 12163
Chemical composition comparison (wt%)
Side-by-side: CuZn28Sn1 (EN) (EN 12163) vs CuZn28Sn1 (EN) (EN 12163)
| Element | CuZn28Sn1 (EN) | CuZn28Sn1 (EN) | Overlap |
|---|---|---|---|
| Cu | 70–73% | 70–73% | OK |
| Zn | — | — | — |
| Sn | 0.9–1.3% | 0.9–1.3% | OK |
| Pb | 0–0.1% | 0–0.1% | OK |
| Fe | 0–0.06% | 0–0.06% | OK |
Mechanical properties
Annealed
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | 330–400 | MPa |
| Yield Strength | 100–170 | MPa |
| Elongation | 45–60 | % |
| Elastic Modulus | ≥ 110 | GPa |
| Density | ≥ 8.53 | g/cm3 |
Related materials
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