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 (2615°C) 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 1100°C (in non-oxidising conditions), which is higher than steels and nickel-based super alloys. When exposed to temperatures in excess of 760°C 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.  

• thickness2" diameter to 28"

Seam welding electrodes are generally in the form of wheels and are referred to as seam welding wheels or rolls. We supply Mipalloy seam welding wheels in Cr.Zr.Cu. Materials. However Ni.Si.Cr.Cu. wheels are available on request. For best results and to ensure lower down times seam welder shafts & housings must be made of Cr.Zr.Cu. Seam welder wheels supplied by us are in proof machined & fully machined condition. All seam welding wheels are manufactured out of individually forged blanks

Chromium Zirconium Coppers are used widely in areas where high electrical and thermal conductivity are required combined with good mechanical properties. Uses include Resistance Welding Machine Electrodes, Seam Welding Wheels, Spot Welding Tips, Flash Butt Welding Electrodes, Anvil Contact Bars, Electrical Switch Gear Contacts & Terminals, Electrode Holders, Cable Connectors, Current Carrying Arms and Shafts, Circuit Breaker Parts, Heat Sinks, Short Circuit Rings, MIG welding contact tubes and many other applications where Copper would normally be the ideal choice for High Conductivity but is just not Strong enough. C18150 Chromium Zirconium Copper is used extensively for cap style resistance welding electrodes. Evidence suggests that it can provide less sticking and resist deformation longer than its chromium copper counterpart in some specific situations.

It is an accepted norm to adopt cap & shank type of spot welding electrode for large requirements of spot welding internationally. This stems from the inherent advantages of caps which are low cost and higher productivity. Spot welder caps are commonly manufactured by cold heading which results in a double edged advantage of lower material consumption for manufacture (translating into lower costs) and higher mechanical properties like higher hardness, higher tensile strength etc due to intense cold working

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.