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DESCRIPTION
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) | 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 | |
|---|---|
| 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
- Hot Forming
- Hot Pressing
- Machining
- Industial
- Marine
- Fasteners
- Others