C48500
Alloy 485, known as naval brass, finds prominent utilization in machine hardware, screw machine products, and valve stems. This variant of naval brass, possessing attributes that are conducive to hot forging, pressing, and machining, stands out. Notably, it boasts elevated ductility and remarkable electrical and thermal conductivity. Additionally, 485 naval brass demonstrates commendable creep resistance and impressive impact strength.
CHEMICAL COMPOSITION
| Elements | Min (%) | Max (%) |
| Cu | 59.00 | 62.00 |
| Pb | 1.30 | 2.20 |
| Sn | 0.50 | 1.00 |
| Fe | – | 0.10 |
| Total Others | – | 0.40 |
| Zn | Remainder | |
| (1) Cu + Sum of Named Elements 99.6% min. | ||
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 | 12 | – | – |
| 0.500 | 1.000 | 60 | 27 | 12 | 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 | 12 | – | – |
| 0.500 | 1.000 | 60 | 27 | 12 | 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 | 12 | – | – |
| 0.500 | 1.000 | 60 | 27 | 12 | 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 | 12 | – | – |
| 0.500 | 1.000 | 60 | 27 | 12 | 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 | 12 | – | – |
| 12 | 25 | 415 | 185 | 12 | 65 | 85 | |
| 25 | 50 | 400 | 180 | 20 | 60 | 85 | |
| 50 | 75 | 370 | 170 | 20 | 60 | 85 | |
| Hex (A/F) | 3 | 12 | 415 | 185 | 12 | – | – |
| 12 | 25 | 415 | 185 | 12 | 65 | 85 | |
| 25 | 50 | 400 | 180 | 20 | 60 | 85 | |
| 50 | 70 | 370 | 170 | 20 | 60 | 85 | |
| Square (A/F) | 3 | 12 | 415 | 185 | 12 | – | – |
| 12 | 25 | 415 | 185 | 12 | 65 | 85 | |
| 25 | 50 | 400 | 180 | 20 | 60 | 85 | |
| 50 | 70 | 370 | 170 | 20 | 60 | 85 | |
| Rectangle (Thickness) | 3 | 12 | 415 | 185 | 12 | – | – |
| 12 | 25 | 415 | 185 | 12 | 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 | 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 | 70 |
