CZ115 / CW722R Extruded High Tensile Brass (Restricted Al) consists of of a duplex structure and is a high tensile brass with a restricted aluminium content, enabling it to be soldered and brazed. Similar in composition to the CW721 / CZ114 (aluminium content aside) this grade it was developed to allow high strength brass components to be joined. Sometimes referred to as a manganese bronze the CW722R / CZ115 has additions of iron, tin and manganese that benefit the physical and mechanical attributes of the alloy.
Extruded Brass is a light brass. This color is a polyester top coat powder coat and has a semi-gloss finish. Top Coat Information: Top coat powder coating colors and clear metallics are transparent. The color of the substrate (surface) under a top coat will affect the finished appearance.
The tin and iron additions impart higher strength levels, while the tin also improves the corrosion resistance. The CW722R / CW115 also offers good fabrication properties with a very good machinability rating, ease of hot forging and the ability to lend itself to finish plating.
Related Specifications
| CZ115 | CuZn40Mn1Pb1FeSn |
| CW722R |
Chemical Composition
| Copper | 56.5-58.5% |
| Tin | 0.2-0.8% |
| Lead | 0.5-1.5% |
| Iron | 0.3-1.0% |
| Aluminium | 0.1% max |
| Manganese | 0.5-2.0% |
| Zinc | Rem |
| Others | 0.5% max |
Mechanical Properties (Specification minima 18-80mm)
| Tensile Strength | 440N/mm2 |
| 0.2% Proof Strength
|
210N/mm2 |
| Elongation √5.65
|
15% |
Key Features
Typical Physical Properties
| Melting Point | 940°C |
| Density | 8.42 g/cm³ |
| Specific Heat | 380 J/Kg°K |
| Thermal conductivity (RT) | 88 W/m°K |
| Thermal expansion coefficient (20-200°C) | 20 x 10-6 |
| Electrical conductivity | 18% IACS |
| Electrical Resistivity | 0.082 ohm mm2/m |
Fabrication Properties
| Hot Working Temperature Range | 700-750°C |
| Hot Formability | Very Good |
| Cold Formability | Poor |
| Machinability rating
(free cutting brass = 100) |
75% |
| Annealing Temp. Range | 425-600°C |
| Stress Relieving Temp. Range | 225-350°C |
Joining Methods
| Soldering | Very Good |
| Brazing | Very Good |
| Oxy-acetylene welding | Not Recommended |
| Gas-shielded arc welding | Not Recommended |
| Resistance welding: Spot and Seam | Not Recommended |
| Butt | Fair |
Typical Uses:
Due to the enhanced mechanical properties and joining properties of CW722R / CZ115 it is utilised in gas valves and fittings, fasteners, pump trim, gears, locks, heavy-duty electrical connectors, transmission components, marine hardware, safety tools and decorative metalwork. CZ114 / CW721R High Tensile Brass Extruded
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