C46400
Brass, a copper-zinc alloy with a 60:40 ratio, incorporates approximately 1% tin for augmented corrosion resistance, particularly against dezincification. This alloy adopts a two-phase alpha-beta structure, endowing it with a relatively high strength level albeit slightly lower ductility compared to the single-phase 70:30 or alpha brass. It finds application in structural contexts and forgings, particularly in scenarios where exposure to seawater may prompt corrosion. The mechanical attributes closely resemble those of 60:40 brass C28000, although the tin addition contributes to slightly elevated strength. While C46400 is readily amenable to hot working and also accommodates cold working, it exhibits less ease in comparison to single-phase alpha brasses.
CHEMICAL COMPOSITION
| Elements | Min (%) | Max (%) |
| Cu | 59.00 | 62.00 |
| Pb | – | 0.20 |
| Sn | 0.50 | 1.00 |
| Fe | – | 0.10 |
| Total Others | – | 0.50 |
| Zn | Remainder | |
MECHANICAL PROPERTIES ACCORDING TO ASTM B371 (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 | 22 | – | – |
| 0.500 | 1.000 | 60 | 27 | 25 | 60 | 80 | |
| 1.000 | 2.000 | 58 | 26 | 25 | 55 | 80 | |
| 2.000 | 2.953 | 54 | 25 | 25 | 55 | 80 | |
| Hex (A/F) | 0.118 | 0.500 | 60 | 27 | 22 | – | – |
| 0.500 | 1.000 | 60 | 27 | 25 | 60 | 80 | |
| 1.000 | 2.000 | 58 | 26 | 25 | 55 | 80 | |
| 2.000 | 2.756 | 54 | 25 | 25 | 55 | 80 | |
| Square (A/F) | 0.118 | 0.500 | 60 | 27 | 22 | – | – |
| 0.500 | 1.000 | 60 | 27 | 25 | 60 | 80 | |
| 1.000 | 2.362 | 58 | 26 | 25 | 55 | 80 | |
| Rectangle (Thickness) | 0.1181 | 0.500 | 60 | 27 | 22 | – | – |
| 0.500 | 1.000 | 60 | 27 | 25 | 60 | 80 | |
| 1.000 | 1.968 | 58 | 26 | 25 | 55 | 80 |
| Range (mm) | From | To | UTS Min (MPa) | PS Min (MPa) | Elongation Min (%) | Hardness Min (HRB) | Hardness Max (HRB) |
| Round (Dia) | 3 | 12 | 415 | 185 | 22 | – | – |
| 12 | 25 | 415 | 185 | 25 | 60 | 80 | |
| 25 | 50 | 400 | 180 | 25 | 55 | 80 | |
| 50 | 75 | 370 | 170 | 25 | 55 | 80 | |
| Hex (A/F) | 3 | 12 | 415 | 185 | 22 | – | – |
| 12 | 25 | 415 | 185 | 25 | 60 | 80 | |
| 25 | 50 | 400 | 180 | 25 | 55 | 80 | |
| 50 | 70 | 370 | 170 | 25 | 55 | 80 | |
| Square (A/F) | 3 | 12 | 415 | 185 | 22 | – | – |
| 12 | 25 | 415 | 185 | 25 | 60 | 80 | |
| 25 | 50 | 400 | 180 | 25 | 55 | 80 | |
| 50 | 60 | 370 | 170 | 25 | 55 | 80 | |
| Rectangle (Thickness) | 3 | 12 | 415 | 185 | 22 | – | – |
| 12 | 25 | 415 | 185 | 25 | 60 | 80 | |
| 25 | 50 | 400 | 180 | 25 | 55 | 80 |
| PHYSICAL PROPERTIES | |
| Melting Point – Liquidus°F | 1650 |
| Melting Point – Solidus°F | 1630 |
| Density lb/cu in. at 68°F | 0.304 |
| Specific Gravity | 8.41 |
| 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 | Good |
| Gas shielded Are Welding | Fair |
| Coated Metal Are Welding | Not Recommended |
| Spot Weld | Good |
| Seam Weld | Fair |
| Butt Weld | Good |
| Capacity for Being Cold Worked | Fair |
| Capacity for Being Hot Formed | Excellent |
| Forgeability Rating | 90 |
| Machinability Rating | 30 |
