MKM Enterpriese Pune, Maharashtra

Many applications demands Copper to have higher mechanical properties and to be capable of use at elevated operating temperatures while still retaining the good conductivity for which it is selected in the first place.

The high-copper alloy family includes Beryllium Coppers, 2% Beryllium Copper, Chromium Coppers, Zirconium Copper , Chromium Zirconium Copper and Nickel Silicon Chromium Copper.

We Supply a large variety of Spot / Projection & Butt welding electrodes to meet diverse needs of the welder. We Supply fully machined electrodes in Chromium Copper, Chromium Zirconium Copper, Beryllium Copper, Tungsten Copper, Tungsten & Molybdenum. We also Supply composite spot welding electrodes with refractory tips of Tungsten or Molybdenum Silver brazed on to Chromium Copper shanks.

Beryllium Copper alloys are used for their High Strength and Good Electrical and Thermal Conductivities.

There are two groups of Beryllium Copper alloys. One is High Strength Alloys and the other High Conductivity Alloys.

The High Conductivity Alloys contain 0.2-0.7% Beryllium and higher amounts of Nickel and Cobalt.

These alloys are used in applications such as Electronic Connector Contacts, Switch and Relay Blades, Control Bearings, Housings for Magnetic Sensing Devices, Non Sparking applications, Small Springs, High Speed Plastic Molds and Resistance Welding Electrodes. Their high conductivity enables high production speed, while their good corrosion and oxidation resistance promotes long mould life.

Beryllium copper is used in Springs & Collets and other parts that must retain their shapes during periods in which they are subjected to repeated strain. Due to its Electrical Conductivity, it is used in Low-Current Contacts for Batteries and Electrical Connectors. And because it is Non-Sparking but physically tough and non-magnetic, it is used to make tools that can be used in explosive environments

CONTACT TIPS FOR MIG WELDING IN CHROMIUM ZIRCONIUM COPPER
We Supply contact tips out of Chromium Zirconium Copper drawn tubes having hardness of 83 'R'B. Because of its high hardness together with higher annealing temperature (525C). These contact tips will

• Give very good life
• Reduce wire sticking
• Reduce wire wandering
• Reduce hole enlargement or contraction during service.

We invite your enquiries with drawings, samples or part number with make to give you most competitive prices. We urges you to insist on Chromium Zirconium Copper tips because a torch is only as good as its tip.

Molybdenum is a refractory metal typically used in high temperature applications. Key properties include:

• Low co-efficient of thermal expansion (5.1x10-6 m/m/C) which is about half that of most steels
• Good thermal conductivity
• Good electrical conductivity
• Good stiffness, greater then that of steel (Young's Modulus 317MPa)
• High melting point (2615C)
• Good hot strength
• Good strength and ductility at room temperature
• High density (10.2 g/cm3)

Its ability to withstand high temperatures and maintain strength under these conditions are responsible for the fact that molybdenum finds most of its application at elevated temperatures. In fact, it can work at temperatures above 1100C (in non-oxidising conditions), which is higher than steels and nickel-based super alloys. When exposed to temperatures in excess of 760C in air rapid oxidation can result. Under these conditions, the oxide layer sublimes and the base metal is attacked. Thus, molybdenum performs best in inert of vacuum environments.

The following list illustrates some of the tungsten applications:
Thoriated or Zirconiated or rare earth oxide alloyed rod electrodes for inert gas welding (TIG welding electrodes).
Sintered pure tungsten electrical contacts
High temperature furnace parts such as tungsten heating coils, reflectors and structural material etc.