Tungsten Alloy Jewelry Counterweight 

Zhuzhou Jiuding Metal Technology Co., Ltd. is a professional manufacturer and supplier of high-density tungsten products, located in Zhuzhou — China’s core tungsten industrial base. The company integrates independent R&D, powder metallurgy production and precision CNC machining, holding complete ISO9001, ISO14001, ISO45001 and ISO13485 quality management system certifications.

Relying on local superior tungsten industry resources, we specialize in producing pure tungsten, non-magnetic tungsten nickel copper and tungsten nickel iron heavy alloy counterweights. All products comply with international environmental standards and are widely exported to Europe, America and other overseas markets. We can provide official material certificates and customized processing services for jewelry and watch industry clients worldwide.

Product Overview

Jiuding metal tungsten jewelry counterweights are hidden embedded weighting accessories, specially designed for necklaces, pendants, bracelets, retro gold-plated jewelry and watch case internal weighting. Adopting high-specific-gravity tungsten materials, our products create a realistic heavy and textured hand feel similar to pure gold and platinum with a tiny volume.

As an eco-friendly alternative to traditional toxic lead counterweights, our tungsten counterweights fully meet RoHS and REACH international environmental requirements for cross-border jewelry sales. These high-density weighting parts are widely applied for various fashion jewelry and watch inner weighting scenarios.

Material Specifications & Density Parameters

Reference Density Comparison: Pure Gold 19.3 g/cm³ | Lead 11.34 g/cm³ | Steel 7.85 g/cm³. All our tungsten alloy blanks are produced by vacuum liquid phase sintering, with uniform internal structure, no pores and stable weight without long-term drift.

Available Product Shapes & Customization

Supported by complete precision processing equipment including CNC lathes, grinding machines and EDM machines, we provide one-stop production from blank forming to finished products. Surface treatments such as sandblasting and polishing are available, and the parts can be further copper-plated and gold-plated to match various jewelry craftsmanship:

• Tungsten Alloy Balls: Φ2mm~Φ10mm, the most common style for pendant cavity filling

• Thin Discs & Sheets: Minimum thickness 0.5mm, used for watch bottom cover and embedded pendant weighting

• Special-shaped Blocks: Square, crescent, arc and irregular shapes, customized by customer drawings

• Tungsten Rings: Lining counterweights for rings and watch bezels

• Tungsten Alloy Four-Leaf Clover Counterweight: Hot-selling personalized shaped counterweight for fashion and luxury jewelry. Adopting integrated powder metallurgy forming and high-precision CNC finishing, the four-leaf clover counterweight features standard symmetrical petal structure, smooth rounded edges, flat surface and zero burrs, perfectly matching mainstream clover-themed jewelry design. Available in three professional material grades: pure tungsten (19.1±0.15 g/cm³, non-magnetic), non-magnetic W-Ni-Cu alloy (18.5±0.15 g/cm³) and cost-effective W-Ni-Fe alloy. It is widely used for embedded weighting of four-leaf clover pendants, necklaces, bracelets and electroplated decorative jewelry. While providing stable high-density heavy hand feel similar to real gold, the exquisite clover outline enables it to serve as both hidden weighting core and decorative inner part. Multiple surface treatments including fine polishing, matte sandblasting, copper plating, gold plating and rose gold plating are supported to meet various high-end jewelry surface craftsmanship requirements.

Core Advantages

• Ultra-high Specific Gravity: Pure tungsten density is close to pure gold, realizing heavy texture with ultra-small volume, solving the problem of insufficient weight of miniature jewelry

• Eco-friendly & Export Compliant: Lead-free, non-radiative, fully compliant with RoHS, REACH and other international environmental standards for cross-border sales

• Corrosion & Sweat Resistant: Excellent oxidation resistance, stable size and weight after long-term wearing and storage

• Optional Magnetic Performance: Non-magnetic pure tungsten and W-Ni-Cu for high-end watches and fine jewelry; slightly magnetic W-Ni-Fe for cost-effective mass orders

• Reliable Quality Control: Strictly implemented in accordance with ASTM B777 standard, EN10204 3.1 material certificates and test reports are available

• Full-service Customization: Support sample trial production and mass batch supply, stable delivery cycle, one-stop OEM & ODM service

• Pure Tungsten / W-Ni-Cu / W-Ni-Fe Heavy Alloy: Professional internal hidden counterweight materials for jewelry, featuring high density, stable performance and good machinability, suitable for various standard and customized shaped weighting parts

FAQ

Q1: Are pure tungsten and W-Ni-Cu alloy non-magnetic?

A1: Yes. Both pure tungsten and W-Ni-Cu are completely non-magnetic, while W-Ni-Fe is slightly magnetic. Non-magnetic types are recommended for watch accessories.

Q2: Can tungsten counterweights be electroplated?

A2: W-Ni-Cu and W-Ni-Fe alloys support copper plating and gold plating. Pure tungsten has higher electroplating difficulty, please confirm the surface process in advance.

Q3: What is the minimum processing size?

A3: The minimum diameter of tungsten balls is 2mm, and the thinnest sheet can reach 0.5mm. Special-shaped parts are customizable according to drawings.

Q4: Can you provide official certification documents?

A4: We can provide EN10204 3.1 material certificates and ASTM B777 test reports to support overseas customer audit and customs clearance.