CW721R
High Tensile Brass are alloys of Copper and Zinc. CW721R is a duplex or alpha/beta alloy. Brass alloy CW 721R is a versatile high strength, hot workable, machinable engineering alloy sometimes referred to as a Manganese Bronze or High Tensile Brass.
CHEMICAL COMPOSITION
| Elements | Min (%) | Max (%) |
|---|---|---|
| Cu | 57.00 | 59.00 |
| Pb | 0.80 | 1.60 |
| Sn | 0.20 | 1.00 |
| Fe | 0.20 | 1.20 |
| Al | 0.30 | 1.30 |
| Mn | 0.80 | 1.80 |
| Ni | - | 0.30 |
| Total Others | - | 0.30 |
| Zn | Remainder | |
Mechanical Properties According To EN12164 CW721R (As Per Temper R440)
| Range (mm) | From | To | UTS Min (N/mm²) | UTS Max (N/mm²) | PS Min (N/mm²) | Elongation Min (%) | Hardness Min | Hardness Max | |
|---|---|---|---|---|---|---|---|---|---|
| Round (Dia) | 40 | 75 | 440 | - | 180 | 20 | - | - | |
| Hex (A/F) | 40 | 60 | 440 | - | 180 | 20 | - | - | |
| Square (A/F) | 40 | 60 | 440 | - | 180 | 20 | - | - | |
| Rectangle | Thickness | 40 | 50 | 440 | - | 180 | 20 | - | - |
| PHYSICAL PROPERTIES | |
|---|---|
| Melting Point | 865°C |
| Density | 8.63g/cm3 |
| Electrical Conductivity | 0.09 x 10⁻⁶ Ω.m |
| Thermal Conductivity | 88.3W/m.K |
| Modulus of Elasticity | 96.5 GPa |
| FABRICATION PROPERTIES | |
|---|---|
| Technique | Suitability |
| Capacity for being Cold formed | Poor |
| Capacity for Being Hot Worked | Good |
| Machinability Ration | 30% |
| Resistance to Corrosion | Excellent |
| Suitability for Soldering | Excellent |
TYPICAL USES
- Gas valves and fittings
- Fasteners
- Pump trim
- Gears
- Locks
- Heavy-duty electrical connectors
- Transmission components
- Marine hardware
- Safety tools and decorative metalwork
- Marine