Tungsten discs and tungsten squares are widely used as contact materials in silicon-controlled rectifier diodes, transistors, and thyristors. Tungsten has similar coefficients of thermal expansion (CTE) to silicon combined with moderate thermal conductivity and is therefore appropriate for large-area power devices where considerable heat is generated. Further applications include the use of Tungsten as heat sink bases in IC’s, LSI’s, and hybrid circuits.

HM is a trusted supplier of pure Tungsten and Tungsten alloy, we offer tungsten (W) discs in various sizes. Other specifications are also available upon request.

Tungsten Disc Specification

• Size: Diameter: 1.0 mm – 150.0 mm (0.04” – 6.0”) x Thick: 0.1 mm – 12.0+ mm (0.004” – 0.5”+)
• Surface: Flatness<0.005mm, Parallelism<0.01mm, Ra<0.063mm, Tolerance: ±0.025mm.
• Material: Tungsten or Tungsten heavy alloy
• Purity: 99.9%~99.99%
• Standard: ASTM B760
• Coating: Ru, Rh, Ni, Ag, Au, etc.

Tungsten Disc Application

• Silicon Controlled Rectifiers Diodes
• Transistors
• Thyristors (GTO ‘s)
• Heat Sink Bases in IC’s, LSI’s, and Hybrid Circuits

Tungsten Disc Order Info

• Quantity (weight, number of pieces, or another suitable measure of quantity)
• ASTM grade (See above Tungsten and Tungsten Alloy ASTM Grade)
• Dimensions (Diameter and thickness)
• Coating, if any
• Additions to the specification and supplementary requirements, if any

Tungsten Disc Packing

Tungsten Discs are tagged and labeled externally to ensure efficient identification and quality control. Great care is taken to avoid any damage caused during storage or transportation. They will be packed in a carton box or wooden case supported with soft materials to ensure that the products thus packed will not shift inside the cases.