Copper
Copper and copper alloys are one of the most versatile engineering materials available. A combination of physical properties such as strength, conductivity, corrosion resistance, machinability, and ductility make copper suitable for a wide range of applications. Variations in alloying composition and processing methods used can further enhance its properties.
The key properties exhibited by Copper and its alloys include: ~ Excellent heat conductivity ~ Excellent electrical conductivity ~ Good corrosion resistance ~ Good biofouling resistance ~ Good machinability ~ Retention of mechanical and electrical properties at cryogenic temperatures ~ Non-magnetic
Melting Point The melting point for pure Copper is 1083ºC.
CORROSION RESISTANCE
All copper alloys resist corrosion by fresh water and steam. In most rural, marine, and industrial atmospheres, copper alloys are also resistant to corrosion. Copper is resistant to saline solutions, soils, non-oxidising minerals, organic acids, and caustic solutions. Moist ammonia, halogens, sulphides, solutions containing ammonia ions, and oxidising acids, like nitric acid, will attack copper. Copper alloys also have poor resistance to inorganic acids. The corrosion resistance of copper alloys comes from the formation of adherent films on the material surface. These films are relatively impervious to corrosion, therefore protecting the base metal from further attack. Copper nickel alloys, aluminium brass, and aluminium bronzes demonstrate superior resistance to saltwater corrosion.
ELECTRICAL CONDUCTIVITY
The electrical conductivity of copper is second only to silver (97% of the conductivity of silver). Due to its much lower cost and greater abundance, it has traditionally been the standard material used for electricity transmission applications.
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Copper C110
This metal contains sufficient oxygen to induce good ductility, combined with the highest conductivity (98-100% IACS) for electrical applications such as busbars and other electrical conductors and components. They also have excellent corrosion resistance to weather in various building applications, and have excellent resistance to most chemicals. |
NZ Stock Rounds 9.53mm - 160mm diameter Squares 10mm - 100mm Flats 6mm- 80mm thick Plates 20mm - 40mm thick |
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Uddeholm Coolmould / Berrylium Copper
A high strength berrylium copper alloy for plastics mould applications.Supplied in the age hardened ( about 40 HRC hardness) condition. Main properties include: high thermal conductivity; good corrosion resistance, polishability, wear resistance; good resistance to galling;good machinability and excellent weldability. Typical applications: Blow moulds (pinch offs,neck rings and handle inserts); Injection moulds (moulds,cores and inserts); Injection nozzles and manifolds for hot runner systems.
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NZ Stock Rounds 8.7mm - 140mm diameter Flats 4mm - 50mm thick TIG Wire Rod 1.6mm diameter Overseas Stock Rounds 12mm - 355mm diameter Flats/ Plates 30mm -200mm thick
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Aluminium Bronze Alloy 954
Alloy 954 is a high strength Aluminium Bronze that is widely used in heavy duty application such as forestry, mining, construction & marine. It is a very hard material which has excellent strength and wear resistance, yet still has good machining properties. Alloy 954 also has a good resistance to impact loading, but due to the absence of lead and zinc, aluminium bronze bearings must have proper lubrication to prevent metal to metal contact and seizure of moving/sliding parts. Characteristic applications for aluminium bronzes are high strain bearings, slide strips and toothed wheels.
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Enquiries welcome |
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Phosphor Bronze PB1
Phosphor Bronze has a fine material structure which helps it reach very high mechanical properties. The phosphor in the material binds to the copper which prevents oxygen from reacting with the material and it also raises the wear resistance of the material. Phosphor bronzes are exclusively available in extruded or drawn shapes. Phosphor bronzes exhibit very high wear resistance,very high strain level and good thermal conductivity. It has good sea water corrosion resistance. Suitable for applications operating at higher temperatures compared with other bronzes. Due to the fine material structure and the absence of heavy metals like lead and zinc, phosphor bronze is suitable for application in the food processing industry. It is also used for springs and big glide planes.
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Enquiries welcome |
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Leaded Bronze / LG2 LG2
Leaded bronze /Leaded Gunmetal has a high lead content and is used when there is a high demand for "dry running properties" with poor lubrication and the bearing has a low strain level. The maximum application temperature for leaded bronzes should be lower as the lead‘s mechanical properties change at a rather low temperature (ca. 200ºC). Good sliding and dry running properties, suitable for bearings with higher circumferential velocity and acid resistant. |
Enquiries welcome |
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