C46750
C46750 Spec SheetNaval Brass C46750 is a copper-zinc-tin alloy designed for excellent corrosion resistance in marine environments, with good strength, hardness, and wear resistance. It is widely used in shipbuilding, marine hardware, and industrial applications requiring durability against seawater.
Chemical Composition
| Elements | Min (%) | Max (%) |
|---|---|---|
| Cu | 59.20 | 62.50 |
| Sn | 1.00 | 1.80 |
| Pb | 0.00 | 0.25 |
| Zn | Remainder | |
| Fe | 0.00 | 0.10 |
| Ni | 0.00 | 0.50 |
| Sb | 0.05 | 0.15 |
| P | 0.05 | 0.15 |
Mechanical properties according to ASTM B21 C46750 (As per temper H50)
| Range (inch) | UTS Min (ksi) |
UTS Max (ksi) |
PS Min (ksi) |
Elongation Min (%) |
Hardness | ||
|---|---|---|---|---|---|---|---|
| Hardness Min (HRB) |
Hardness Max (HRB) |
||||||
| Round (Dia) | 0.300 – 0.500 | 48 | – | 20 | 5 | – | – |
| 0.500 – 1.000 | 48 | – | 20 | 10 | – | – | |
| 1.000 – 2.000 | 48 | – | 20 | 15 | – | – | |
| Hex (A/F) | 0.300 – 0.500 | 48 | – | 20 | 5 | – | – |
| 0.500 – 1.000 | 48 | – | 20 | 10 | – | – | |
| 1.000 – 2.000 | 48 | – | 20 | 15 | – | – | |
| Square (A/F) | 0.300 – 0.500 | 48 | – | 20 | 5 | – | – |
| 0.500 – 1.000 | 48 | – | 20 | 10 | – | – | |
| 1.000 – 2.000 | 48 | – | 20 | 15 | – | – | |
| Rectangle | Thickness: 0.300 – 0.500 | 48 | – | 20 | 5 | – | – |
| Width: 0.500 – 1.000 | |||||||
| Thickness: 0.500 – 1.000 | 48 | – | 20 | 10 | – | – | |
| Width: 1.000 – 2.000 | |||||||
| Thickness: 1.000 – 2.000 | 48 | – | 20 | 15 | – | – | |
| Width: 2.000 – 3.000 | |||||||
| Range (mm) | UTS Min (MPa) |
UTS Max (MPa) |
PS Min (MPa) |
Elongation Min (%) |
Hardness Min (HRB) |
Hardness Max (HRB) |
||
|---|---|---|---|---|---|---|---|---|
| Round (Dia) | 8 | 12 | 315 | – | 140 | 5 | – | – |
| 13 | 25 | 315 | – | 140 | 10 | – | – | |
| 25 | 50 | 315 | – | 140 | 15 | – | – | |
| Hex (A/F) | 8 | 12 | 315 | – | 140 | 5 | – | – |
| 13 | 25 | 315 | – | 140 | 10 | – | – | |
| 25 | 50 | 315 | – | 140 | 15 | – | – | |
| Square (A/F) | 8 | 12 | 315 | – | 140 | 5 | – | – |
| 13 | 25 | 315 | – | 140 | 10 | – | – | |
| 25 | 50 | 315 | – | 140 | 15 | – | – | |
| Rectangle | Thickness | 8 – 12 | 315 | – | 140 | 5 | – | – |
| Width | 12 – 25 | |||||||
| Thickness | 13 – 25 | 315 | – | 140 | 10 | – | – | |
| Width | 25 – 50 | |||||||
| Thickness | 25 – 50 | 315 | – | 140 | 15 | – | – | |
| Width | 50 – 75 | |||||||
| PHYSICAL PROPERTIES | |
|---|---|
| Melting Range | 1546–1632 °F |
| Density | 0.31 lb/cu in (8.48 g/cm³) |
| Electrical Conductivity | ~22% IACS |
| Thermal Conductivity | 59.6 Btu/sq. ft/ft hr/°F |
| Coefficient of Thermal Expansion | 10 × 10⁻⁶ per °F (68–212°F) |
| FABRICATION PROPERTIES | |
|---|---|
| Technique | Suitability |
| Hot Working | Excellent |
| Cold Working | Moderate |
| Machinability | Good |
| Soldering and brazing | Good |
| Welding | Fair |
Typical Uses
Propeller shafts and pump shafts
Bushings and bearings
Valves, fasteners, and fittings
Marine hardware
