C4622
C4622 Naval Brass is prominently employed in various applications, notably for machine hardware, screw machine products, and valve stems. This alloy, known as C4622 Naval Brass, exhibits superior suitability for hot forging, pressing, and machining procedures. Possessing elevated ductility, C4622 Naval Brass also boasts exceptional electrical and thermal conductivity. Furthermore, it showcases commendable resistance to creep and impressively high impact strength.
CHEMICAL COMPOSITION
| Elements | Min (%) | Max (%) |
| Cu | 61.00 | 64.00 |
| Pb | – | 0.30 |
| Sn | 0.70 | 1.50 |
| Fe | – | 0.20 |
| Zn | Remainder | |
MECHANICAL PROPERTIES ACCORDING TO BS287 (AS PER TEMPER M)
| Range (mm) | From | To | UTS Min (MPa) | PS Min | Elongation Min (%) | Hardness Min (HRB) | Hardness Max (HRB) |
| Round (Dia) | 1.5 | 75 | 365 | – | 20 | – | – |
| Hex (A/F) | 3 | 70 | 365 | – | 20 | – | – |
| Square (A/F) | 3 | 60 | 365 | – | 20 | – | – |
| Rectangle (Thickness) | 3 | 50 | 365 | – | 20 | – | – |
| PHYSICAL PROPERTIES | |
| Melting Point – Liquidus°F | 1650 |
| Melting Point – Solidus°F | 1630 |
| Density lb/cu in. at 68°F | 0.305 |
| Specific Gravity | 8.44 |
| Electrical Conductivity % IACS at 68°F | 26 |
| Thermal Conductivity Btu/ sq ft/ ft hr/ °F at 68°F | 67 |
| Coefficient of Thermal Expansion 68-57210⁻⁶ per °F (68 – 572°F) | 11.8 |
| Specific Heat Capacity Btu/ lb /°F at 68°F | 0.09 |
| Modulus of Elasticity in Tension ksi | 15000 |
| Modulus of Rigidity ksi | 5600 |
| FABRICATION PROPERTIES | |
| Technique | Suitability |
| Soldering | Excellent |
| Brazing | Good |
| Oxyacetylene Welding | Not Recommended |
| Gas Shielded Arc Welding | Not Recommended |
| Coated Metal Arc Welding | Not Recommended |
| Spot Weld | Not Recommended |
| Seam Weld | Not Recommended |
| Butt Weld | Fair |
| Capacity for Being Cold Worked | Poor |
| Capacity for Being Hot Formed | Good |
| Forgeability Rating | 90 |
| Machinability Rating | 50 |
