Pure Tungsten block

Product Overview

Pure tungsten block is solid bulk refractory metal blank manufactured by powder metallurgy sintering combined with hot forging process, adopting 99.95% high purity tungsten raw material. Multiple surface finishes are available including as forged, ground and polished surfaces. The picture shows precision machined pure tungsten blocks with flat smooth faces, sharp edges and uniform dimension. Tungsten possesses the highest melting point among all metals at 3422°C, featuring ultra low vapor pressure, low thermal expansion coefficient, excellent thermal electrical conductivity and outstanding high temperature mechanical strength. We provide comprehensive secondary processing services such as sawing, milling, drilling, chamfering and CNC fabrication according to customer drawings. This product is widely adopted for vacuum furnace hot zone blanks, semiconductor fixture bases, radiation shielding blocks, sputtering target blanks, aerospace high temperature test and scientific research laboratories.

Core Product Advantages

• Ultra high Material Purity: Main grade adopts 99.95% pure tungsten; forged processed blocks achieve stable density ≥18.8 g/cm³, guaranteeing consistent physical chemical performance batch by batch. • Diversified Surface Treatment: As forged, ground or polished surfaces optional; solid block free of cracks, internal pores, delamination and inclusions. The machined version features flat smooth faces, precise dimensional tolerance and sharp clean edges as shown in the photo. • Excellent Vacuum Compatibility: Low vapor pressure and low outgassing property; will not generate volatile contaminants under high temperature vacuum working environments. • Outstanding High temperature Comprehensive Performance: Retain sufficient mechanical strength under extreme high temperature conditions; resist thermal shock and high temperature creep deformation for long time service. • Powerful Customization Capability: Support non standard length, width, height, chamfer and special notch features; realize complex shape bases and fixture blocks via precision CNC machining. • Complete Document Support: COA, CO, COC, EN10204 3.1 inspection certificate and third party material test reports can be supplied upon client’s request. • Authorized Factory Qualifications: ISO9001, ISO45001, ISO13485, RoHS and REACH certifications to satisfy global export requirements.

Product Performance Features

• Extreme High temperature Resistance: Can serve long term as structural base blocks inside high temperature vacuum and hydrogen furnaces. • Good Thermal & Electrical Conductivity: Fit for electric vacuum devices, high current conductive bases and heat sink assemblies. • Reliable Radiation Shielding Capacity: High density brings remarkable attenuation effect for X‑ray and gamma‑ray radiation. • Low Thermal Deformation: Low thermal expansion coefficient minimizes dimension shift under repeated heating cooling cycles. • Good Machinability: Can be sawed, milled, drilled and chamfered into all kinds of special shaped refractory bases and blanks. • Strict Batch Stability: Mature powder metallurgy and hot forging workflow ensure repeatable product performance for large volume orders.

Executive & Testing Standards

Executive Standards: GB/T 3459‑2022, GB/T 3875‑2017, Mil‑T‑21014, ASTM B760‑07(2023), ASTM B777‑99. Testing & Verification Standards: Chemical composition test follows GB/T 4324; density inspection complies with GB/T 3850; metallographic grain size test refers to GB/T 6394; dimension and flatness inspection implements ASTM B760‑07(2023).

Application Scenarios

Benefiting from high melting point, low outgassing, good thermal electric performance and high density shielding property, pure tungsten blocks are widely used across multiple high end industrial sectors:

• Vacuum Furnace Hot zone Components: Manufactured into heavy load support bases, heat sink blocks and fixture substrates for sintering furnaces, brazing furnaces and crystal growth furnaces, bearing heavy mechanical load under continuous ultra high temperature vacuum conditions.

• Semiconductor Equipment Parts: Used as sputtering target blanks, fixture base blocks and high temperature carrier substrates for ion implantation, plasma etching and thin film deposition equipment; low outgassing characteristic ensures clean semiconductor process environment.

• Radiation Shielding Components: Further machined into shielding blocks and collimator substrates for medical imaging instruments and industrial non destructive testing facilities for X‑ray and gamma‑ray shielding.

• Electric Vacuum & High Power Equipment: Applied for high power tube base blocks, heat dissipation substrates and conductive structural blocks requiring stable electrical and thermal conduction.

• Aerospace High temperature Simulation Test: Act as thermal test load blocks, high temperature mounting bases and specimen holders for aerospace material thermal cycle simulation experiments.

• Analytical Instrument & Scientific Research Equipment: Fabricated into heavy duty sample stage bases, heat carrier blocks for electron microscopes, mass spectrometers and various laboratory high temperature analytical devices.

• Sputtering and Coating Industry Raw Blanks: Serve as original solid blanks for manufacturing planar and custom shape tungsten sputtering targets.

• Custom Refractory Blanks for Metallurgy & Research: Serve as raw bulk blanks for laboratories and metallurgical equipment to produce tungsten fixtures, dies and various customized refractory components.

Production & Quality Assurance

All JDTG‑PW‑005 pure tungsten blocks are produced with standardized powder metallurgy sintering, hot forging, stress relief annealing and precision surface finishing, complying with Chinese GB standards, US Mil‑T‑21014 and ASTM specifications. Full process quality control covers raw material incoming inspection, sintering parameter monitoring, forging procedure control, surface treatment and finished product full inspection including flatness check, to guarantee purity, density, dimensional accuracy and surface integrity for every batch.

Upon request, we can provide full set official qualification documents including third party material testing reports, COA (Certificate of Analysis), CO, COC and EN10204 3.1 factory inspection certificate. Our factory holds ISO9001, ISO45001, ISO13485 management system certifications together with RoHS and REACH compliance. We support industrial grade and semiconductor grade mass production, as well as drawing based OEM & ODM custom processing services.