Tungsten News

Tungsten News
【Know Tungsten】Why Tungsten Copper Block Can Be Used for Electrical Discharge Machining (EDM)? 181

The tungsten copper block, measuring 34x33x15mm and composed of 80% tungsten and 20% copper, is a composite material produced through powder metallurgy. It combines tungsten’s high density, high melting point, and exceptional hardness with copper’s excellent electrical and thermal conductivity. This versatile material offers both mechanical strength and thermal performance, making it well-suited for applications such as spot welding and electrical discharge machining (EDM).

Tungsten News
【Know Molybdenum】Ultra-Thin Customized Molybdenum Discs Used as Heat Shields 170

The customized molybdenum disc with a thickness of 0.1mm, an outer diameter of 66.5mm, and an inner diameter of 36mm is a thin sheet product made from high-purity molybdenum. It boasts excellent mechanical properties and chemical stability, making it ideal for use in high-temperature and corrosive environments. Customized molybdenum discs can maintain stable performance under extreme high-temperature conditions. As a result, they are often used as heat shields or reflective screens in vacuum furnaces and high-temperature furnaces.

Tungsten News
India Scraps Customs Duties on Scrap of Tungsten & Other Critical Minerals 71

According to Reuters, India’s Finance Minister Nirmala Sitharaman stated during her annual budget speech on February 1st that India has scrapped customs duties on waste and scrap from a dozen critical minerals, including those of antimony, cobalt, tungsten, copper, lead, zinc, as well as waste and scrap of lithium-ion battery. Sitharaman said that this move will help secure their availability for manufacturing in India. Furthermore, the Indian government will also launch a policy for recovery of critical minerals from tailings…

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MOFCOM Spokesperson Answers Questions from Reporters on Export Controls Imposed on Tungsten and Related Items 82

MOFCOM Spokesperson Answers Questions from Reporters on Export Controls Imposed on Tungsten and Related Items Q: On February 4th, the Ministry of Commerce (MOFCOM) and the General Administration of Customs jointly issued an announcement on export controls for tungsten and related items. What considerations did China take into account when formulating this export control policy? A: On February 4th, MOFCOM, in conjunction with the General Administration of Customs, issued an announcement on export controls for tungsten and related items, implementing…

Tungsten News
China Implements Export Controls on Tungsten & Molybdenum Items 464

The Ministry of Commerce of the People’s Republic of China and the General Administration of Customs have decided to implement export controls on tungsten, tellurium, bismuth, molybdenum, and indium-related items to safeguard national security and interests and fulfill international obligations such as non-proliferation. The relevant items subject to export control are as follows: I. Tungsten-Related Items (1) 1C117.d. Tungsten-Related Materials: Ammonium Paratungstate (Customs HS Code for reference: 2841801000); Tungsten Oxide (Customs HS Codes for reference: 2825901200, 2825901910, 2825901920); Tungsten Carbide…

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Cutting Methods and Forming Processes of TZM Molybdenum Alloy Plates 105

TZM molybdenum alloy is a material with excellent mechanical properties and high-temperature resistance, widely used in aerospace, nuclear industry, and high-temperature furnace applications. Due to its high hardness, high melting point, and low ductility, the cutting and forming processes of TZM molybdenum alloy plates present certain technical challenges. Below are the primary methods and considerations for cutting and forming TZM alloy plates: Cutting Methods Given the high hardness and low ductility of TZM molybdenum alloy, common cutting methods include mechanical…

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Why TZM Alloy Is an Indispensable Material in High-temperature Industrial Applications? 99

TZM molybdenum alloy is a high-performance alloy based on molybdenum, with small amounts of titanium (Ti), zirconium (Zr), and carbon (C) added. Its name derives from the initials of these additive elements. As an advanced material widely used in aerospace, nuclear industries, and high-temperature industrial applications, TZM alloy is renowned for its exceptional melting point and high-temperature performance. Molybdenum itself is a high-melting-point metal, with a melting point of 2623°C. The melting point of TZM molybdenum alloy, enhanced by the…

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What Factors Influence the Longevity of Barium Tungsten Cathodes? 79

Barium tungsten cathodes are critical components in electron emission devices. The longevity of these cathodes directly impacts the efficiency and operational lifespan of the devices they are used in. Several factors influence the durability and performance of barium tungsten cathodes, as detailed below. Operating Temperature Operating temperature is one of the most significant factors affecting the lifespan of BaW cathodes. These cathodes rely on thermionic emission, which requires elevated temperatures. However, prolonged exposure to excessively high temperatures can accelerate barium…

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What Are the Advantages of Using Barium Tungsten Cathodes in Electron Emission Devices? 81

Barium tungsten cathodes are widely used in electron emission devices, including vacuum tubes, cathode ray tubes (CRTs), and X-ray tubes. These cathodes are renowned for their exceptional performance characteristics, which make them indispensable in applications requiring reliable electron emission. Below are the primary advantages of using these cathodes in such devices. High Electron Emission Efficiency One of the foremost advantages is their ability to emit electrons efficiently. The incorporation of barium, which acts as a reducing agent, significantly lowers the…

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【Know Tungsten】Fine Tungsten Rod: Essential Material for High-Precision Industries 230

A fine tungsten rod with a diameter of 1.0 mm and a length of 38 mm is a small bar made of high-purity tungsten, characterized by its high melting point, high density, high strength, and excellent corrosion resistance. Its precise dimensions and superior physical properties make it widely used in electronic devices, vacuum components, medical equipment, and precision manufacturing. The fine tungsten rod performs exceptionally well in high-temperature environments, maintaining stable physical integrity and excellent conductivity, making it an indispensable…

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