Tungsten Electrodes

Product Standard: ISO 6848 ANSI/AWS A5.12/A5. A2M-98Diameter: 0.5-25mmLength: 75mm, 85mm, 150mm, 175mm, and any other length at customer's requestWT10 YELLOWWT20 REDWT30 VIOLETWT40 ORANGEWC20 GREYWP GREENWY20 BLUEWL10 BLACKWL15 GOLDEN YELLOWWL20 SKY BLUEWZ3 BROWNWZ8 WHITETungsten has the highest melting point (3410° C) and the lowest vapour pressure among all the metals, which makes it a preferred candidate for use as a high performance material in a variety of high temperature products and processes.Main Characteristics:High melting point (3410° C)Low thermal expansionHigh electrical resistanceLow vapour pressureGood thermal conductivityHigh density Mass Characteristics:Symbol: WAtomic Number: 74Atomic Weight: 183.85Density: 19.254 g/ccThermal Properties:Melting Point: 3410° C (+ 20° C)Boiling Point: 5900° CSpecific Heat: 0.14 kJ/kg x K at 20° CLatent Heat of Fusion: 209 kJ/kg (estimated)Thermal Conductivity: 129 W/m x K at 20° CEvaporation Heat: 444 J/g Electrical Properties:Electrical Resistivity: 5.5 μΩ/cm at 20° CTemperature Coefficient of the Electrical Resistivity: 0.00482 Ω/ΩKTemperature of Superconductivity: 0.016 KMechanical Properties:A lot of factors such as microstructure, impurity contents in the tungsten, other alloying elements and heat treatment (for example annealing conditions) inflence the machanical properties of tungsten. By offering various tungsten alloys, TLWM could satisfy the specific needs from customers.Chemical Properties:Tungsten is resistant to corrosion when the humidity is below 60%. However, it must be protected at elevated temperatures. Tungsten can oxidize in the presence of oxidizing gases at temperatures above 250° C. Despite this vulnerability, Molten glass, nitrogen, inert gases, molten metals and ceramic oxides only slightly affect it.