Tungsten Alloy Jewelry Counterweight
Detailed description
Leveraging the advantageous local tungsten industry resources, we specialize in manufacturing pure tungsten, non-magnetic tungsten-nickel-copper and tungsten-nickel-iron heavy alloy counterweights. All our products meet international environmental standards and are widely exported to Europe, North America and other overseas markets. We are able to provide official material certifications and customized processing services for jewelry and watch industry customers around the globe.
Product Overview
Jiuding's tungsten counterweights for jewelry are concealed embedded weighting accessories, specially designed for internal weighting in necklaces, pendants, bracelets, retro gold-plated jewelry and watch cases. Made from high-specific-gravity tungsten material, our products deliver a realistic heavy, textured hand feel comparable to pure gold and platinum even at a small 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
|
Material Grade |
Density |
Magnetic Property |
Application Features |
|
Pure Tungsten |
19.1±0.15 g/cm³ |
Non-magnetic |
Ultra-high density, minimum volume under the same weight. Ideal for high-end precision pendants and luxury watch counterweights with strict volume limits |
|
Non-magnetic W-Ni-Cu Alloy |
18.5±0.15 g/cm³ |
Non-magnetic |
Preferred material for jewelry and watches. Balances high density and excellent machinability, no magnetic interference with precision watch movements |
|
W-Ni-Fe Alloy |
17.8~18.7 g/cm³ |
Slightly magnetic |
Cost-effective general-grade counterweight, perfect for mass production of conventional jewelry weighting parts |
TReference 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.