TRI-METAL CONTACTS RIVETS
This unique product, has been for the first time introduced in India by the PARADISE house and excellently serves the requisite purpose with crown of success. We have equipment capable to produce tri-metal contact rivets with diameter between 2.0 mm to 10 mm.
​
Over and above the advantages claimed by bi-metal contact rivets, it is double headed, with head tip layer and shank tip layer of precious contact material while the base material is OFHD Copper. The shank end will be rivetted over to form the second contact head,when in use.
​
Products in forms of rivet and disc can be available with perfect metallurgical bond having the precious contact materials layer thickness generally in 50% or any desired ratio to suit individual application.
Bimetal & Trimetal
Electrical Contacts
MATERIAL
PROPERTIES
(The above listed values are typical and shall not be taken for specification.
There are a few in other grades having different composition.)
Below mentioned are the characteristics of various metals that are used for the manufacturing purposes:
The proper selection of contact material is one of the major problems which modern industry are facing. The selection of ideal contact materials depends on the basic properties like high electrical, high conductivity, good arc –interrupting capabilities with minimum contact resistance. Moreover, they must resist corrosion due to arc erosion and have minimum tendency against interfacial welding or sticking during service.
Material Properties:
​
SILVER
Silver metal in its pure state has a brilliant white metallic lustre.It is a
little harder than gold and is very ductile and malleable. It is classified
with the precious metals. Silver is stable in pure air and water, but
tarnishes when exposed to ozone, hydrogen sulphide, or air containing
sulphur because of the formation of a silver sulphide.
CADMIUM
Cadmium metal is produced as a by-product from the extraction, smelting and refining of the nonferrous metals zinc, lead and copper. Rather than disposing of it as a waste, engineers have been able to utilize its unique properties for many important industrial applications.
Cadmium metal exhibits excellent resistance to corrosion, particularly in alkaline and seawater environments, possesses a low melting temperature and rapid electrical exchange activity, and has both high electrical and thermal conductivity. Cadmium compounds possess outstanding resistance to high stresses and high temperatures, and deter ultraviolet light degradation of certain plastics. Some cadmium electronic compounds exhibit semi-conducting properties and are utilized in electrical contacts and many electronic applications.
​
COPPER
Copper (CU) is one of the oldest metals that is well known and holds
great importance. Pure copper has a distinctive engineering property .
Its low electrical resistivity—one of the lowest of all elements. Because
of this property, and its relative abundance in nature, pure copper is
widely used as an electrical conductor.
Copper is also an excellent thermal conductor .Copper is one of the noble metals, so it is corrosion resistant. All of these properties combine to make copper one of the most important metals.
​
NICKEL
Nickel is magnetic and its modulus of elasticity is virtually the same as that of Iron & Steel. It is much more corrosion resistant, and the high temperature properties of its alloys are generally superior. Because of its corrosion-resistant characteristics, it is widely used as alloying element.
Application of the Electrical contacts: (pictures of the relay and the switch)
Our range of rivets based on silver base alloys is quite wide and is ideally suited for electrical switches, contactors, motor starters, clock control devices ,cassette deck mechanism ,thermostat and power relays etc.
​
​
