70WCu / 75WCu Tungsten Copper Blank for Ring & Jewelry

70WCu / 75WCu Tungsten Copper Blank for Ring & Jewelry

Product Introduction

Zhuzhou Jiuding Metal Technology Corp Ltd is a reliable manufacturer and supplier of high-purity tungsten copper jewelry blanks and tungsten ring raw materials based in Zhuzhou, China, the world’s core tungsten industrial base. We specialize in the precision production and customized processing of 70WCu and 75WCu tungsten copper blanks, premium composite raw materials widely used for tungsten rings, tungsten copper bands, decorative tungsten loops and a full range of fashion jewelry accessories. Manufactured in strict accordance with GB/T 8320 and ASTM B702 dual international standards, our jewelry-grade blanks feature high density, exceptional scratch resistance, superior oxidation stability and consistent elegant metallic luster. Adopting advanced vacuum infiltration metallurgy and precision finishing technology, we deliver pore-free, impurity-free and defect-free tungsten copper billets, supporting custom sizes, thicknesses and special-shaped blanks to meet diverse jewelry manufacturing needs worldwide.

Product Overview

70WCu / 75WCu Tungsten Copper Blank is a high-performance tungsten-copper composite material exclusively formulated for premium jewelry and decorative ornament production. 70WCu (70% Tungsten + 30% Copper) and 75WCu (75% Tungsten + 25% Copper) are the most popular and practical grades for jewelry blank manufacturing, achieving an ideal balance of high hardness, refined metallic texture and excellent machinability for cutting, engraving and polishing. Unlike conventional industrial tungsten copper alloys, our jewelry-grade blanks adopt optimized batching and high-purity purification processes, featuring uniform internal structure, zero pores, no inclusions and smooth base surface. These two stable alloy grades serve as ideal raw materials for crafting tungsten rings, tungsten copper bands, decorative tungsten loops and custom jewelry blanks, widely recognized by jewelry manufacturers for stable texture, outstanding wear resistance and hassle-free post-processing performance.

Dual Standard Compliance (GB/T 8320 & ASTM B702)

All our 70WCu and 75WCu jewelry-grade tungsten copper blanks fully comply with China’s GB/T 8320 national standard and the US ASTM B702 industrial standard. Every batch is strictly controlled in chemical composition, density, hardness and surface quality, ensuring excellent batch consistency, eco-friendly and skin-friendly properties, and full compliance with global jewelry processing specifications and international export inspection standards.

Standard Parameter Specification for 70WCu & 75WCu Jewelry Grade

We implement strict quality control on all core technical indicators to guarantee stable texture, reliable performance and superior machinability for ring and ornament fabrication:

• 70WCu Alloy Composition: 70% Tungsten, 30% Copper, total impurities ≤ 0.3%

• 75WCu Alloy Composition: 75% Tungsten, 25% Copper, total impurities ≤ 0.3%

• 70WCu Density: 13.8 g/cm³

• 75WCu Density: 14.5 g/cm³

• Hardness Performance: Balanced hardness and toughness for effortless cutting, engraving and fine polishing

• Surface Quality: Crack-free, pore-free, oxidation-free with uniform and delicate texture

• Material Characteristics: Eco-friendly, hypoallergenic, wear-resistant and long-lasting metallic luster

Customization Service for Jewelry Blanks

We provide comprehensive one-stop customization services for 70WCu and 75WCu tungsten copper jewelry blanks, catering to personalized manufacturing requirements for various tungsten rings, tungsten loops and decorative ornaments:

• Custom Dimension: Customizable outer diameter, inner diameter, thickness and strip width for standard ring and loop blanks

• Shape Customization: Custom round rings, flat blanks, arc blanks and irregular special-shaped jewelry base blanks

• Precision Machining: Professional fine cutting, surface grinding, mirror polishing, chamfering and pre-finishing treatment

• Batch Production Support: Stable mass supply with consistent size, texture and performance, suitable for large-scale jewelry factory production

Core Technical Specifications

Our jewelry-grade 70WCu and 75WCu tungsten copper blanks feature stable and standardized comprehensive performance, perfectly adaptable to all types of precision jewelry processing:

Key Product Features

• Premium Jewelry-Grade Texture: Manufactured via precision vacuum infiltration sintering, the blanks deliver uniform, delicate internal structure and stable metallic luster. Free of dark spots, pores and impurities, they present a high-end glossy finish after fine polishing.

• Superior Wear & Scratch Resistance: Optimized hardness and toughness effectively resist daily scratches, abrasion and impact, ensuring long-term brightness and structural stability without deformation for long-wear jewelry.

• Excellent Machinability: The classic 70WCu and 75WCu jewelry-grade formulas balance rigidity and ductility perfectly, supporting custom cutting, bending, deep engraving, stone inlay and mirror polishing for diversified jewelry design styles.

• Outstanding Anti-Oxidation & Colorfast Performance: Stable alloy molecular structure resists air oxidation, sweat corrosion and daily erosion, maintaining original metallic color and luster without fading or discoloration for lifelong wearing.

• Diversified Customization Flexibility: Flexible size and shape customization supports standard ring blanks, decorative tungsten loops, fashion ornament substrates and personalized custom blanks, meeting diverse designer and factory customization needs.

Main Applications

70WCu and 75WCu tungsten copper blanks are professional dedicated raw materials for fashion jewelry and decorative ornaments, widely adopted in global jewelry processing, customization and high-end accessory manufacturing industries:

• Tungsten Copper Ring Blanks: Core raw materials for men’s & women’s fashion tungsten rings, couple rings, engraved custom rings and daily wear band rings

• Tungsten Loop & Ornament Blanks: Premium blanks for decorative tungsten loops, circular tungsten accessories, jewelry connecting rings and ornamental circular parts

• Fashion Jewelry Base Materials: Precision substrate blanks for personalized ornaments, stone inlay bases and customized jewelry accessories

• High-End Custom Handmade Jewelry: Ideal raw materials for designer exclusive ornaments, luxury customized tungsten copper jewelry and craft accessories

• Hypoallergenic Daily Wear Accessories: Skin-friendly, non-irritating tungsten copper blanks suitable for long-term daily wearable jewelry production

Manufacturing & Quality Assurance

Zhuzhou Jiuding Metal is an ISO-certified professional tungsten alloy manufacturer. All 70WCu and 75WCu jewelry-grade tungsten copper blanks undergo full-process precision quality control in compliance with GB/T 8320 and ASTM B702 dual standards. We adopt high-purity raw material screening, strictly controlled sintering temperature and density, and implement 100% visual surface inspection and dimensional testing before delivery. All products are guaranteed zero impurities, zero pores and zero cracks. We provide official COA material certificates and batch quality inspection reports, ensuring stable and reliable quality for long-term cooperative jewelry manufacturers.

Packaging & Global Shipping

Each tungsten copper jewelry blank is individually wrapped with soft anti-scratch bubble film to avoid friction, scratches and extrusion deformation, then packed in shockproof customized export cartons. We support global sea freight, air freight and international express delivery, providing stable batch supply and efficient global delivery services for jewelry manufacturers and customized processing customers worldwide.