C48200
Naval Brass, a copper-zinc alloy in a 60:40 ratio, incorporates approximately 1% tin to enhance its corrosion resistance, particularly countering dezincification. The alloy embodies a two-phase alpha-beta brass structure, resulting in notable strength albeit with slightly reduced ductility. This alloy is well-suited for applications involving hot forging, pressing, and machining.
CHEMICAL COMPOSITION
| Elements | Min (%) | Max (%) |
| Cu | 59.00 | 62.00 |
| Pb | 0.40 | 1.00 |
| Sn | 0.50 | 1.00 |
| Fe | – | 0.10 |
| Total Others | – | 0.40 |
| Zn | Remainder | |
MECHANICAL PROPERTIES ACCORDING TO ASTM B21 (AS PER TEMPER HO2)
| Range (Inch) | From | To | UTS Min (ksi) | PS Min (ksi) | Elongation Min (%) | Hardness Min (HRB) | Hardness Max (HRB) |
| Round (Dia) | 0.059 | 0.500 | 60 | 27 | 18 | – | – |
| 0.500 | 1.000 | 60 | 27 | 18 | 65 | 85 | |
| 1.000 | 2.000 | 58 | 26 | 20 | 60 | 85 | |
| 2.000 | 2.953 | 54 | 25 | 20 | 60 | 85 | |
| Hex (A/F) | 0.118 | 0.500 | 60 | 27 | 18 | – | – |
| 0.500 | 1.000 | 60 | 27 | 18 | 65 | 85 | |
| 1.000 | 2.000 | 58 | 26 | 20 | 60 | 85 | |
| 2.000 | 2.756 | 54 | 25 | 20 | 60 | 85 | |
| Square (A/F) | 0.118 | 0.500 | 60 | 27 | 18 | – | – |
| 0.500 | 1.000 | 60 | 27 | 18 | 65 | 85 | |
| 1.000 | 2.000 | 58 | 26 | 20 | 60 | 85 | |
| 2.000 | 2.362 | 54 | 25 | 20 | 60 | 85 | |
| Rectangle (Thickness) | 0.118 | 0.500 | 60 | 27 | 18 | – | – |
| 0.500 | 1.000 | 60 | 27 | 18 | 65 | 85 | |
| 1.000 | 1.968 | 58 | 26 | 20 | 60 | 85 |
| Range (mm) | From | To | UTS Min (MPa) | PS Min (MPa) | Elongation Min (%) | Hardness Min (HRB) | Hardness Max (HRB) |
| Round (Dia) | 1.5 | 12 | 415 | 185 | 18 | – | – |
| 12 | 25 | 415 | 185 | 18 | 65 | 85 | |
| 25 | 50 | 400 | 180 | 20 | 60 | 85 | |
| 50 | 75 | 370 | 170 | 20 | 60 | 85 | |
| Hex (A/F) | 3 | 12 | 415 | 185 | 18 | – | – |
| 12 | 25 | 415 | 185 | 18 | 65 | 85 | |
| 25 | 50 | 400 | 180 | 20 | 60 | 85 | |
| 50 | 70 | 370 | 170 | 20 | 60 | 85 | |
| Square (A/F) | 3 | 12 | 415 | 185 | 18 | – | – |
| 12 | 25 | 415 | 185 | 18 | 65 | 85 | |
| 25 | 50 | 400 | 180 | 20 | 60 | 85 | |
| 50 | 60 | 370 | 170 | 20 | 60 | 85 | |
| Rectangle (Thickness) | 3 | 12 | 415 | 185 | 18 | – | – |
| 12 | 25 | 415 | 185 | 18 | 65 | 85 | |
| 25 | 50 | 400 | 180 | 20 | 60 | 85 |
| 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 | Excellent |
| 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 |
