Brass is a 60:40 copper zinc alloy to which about 1% of tin has been added to improve the corrosion resistance, particularly to dezincification. The allov is a two phase alpha-beta brass. hence has reasonablv high strength with lower ductility than the singlephase 70:30 or alpha brass. lt is used for structural applications and for forgings, especially where contact with sea water is likelto induce corrosion. The mechanical properties are almost indistinguishable from those of 60:40 brass C28000, although the tin addition tends to give slightly higher strength. C46400 can be readily hot worked, and can also be cold worked, but not as easily asthe 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(ksì) | 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° | 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 |