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Product Description
Zinc-nickel-copper alloy rods—commonly known in the industry as "German Silver" rods—are produced by smelting copper, nickel, and zinc. Mainstream grades include BZn15-20, BZn18-18, BZn12-26, C7541, and C7701,
all manufactured in strict accordance with the GB/T 4423 national standard. These rods exhibit a uniform, fine, silvery-white metallic luster and a smooth texture; they are free from processing defects such as porosity, sand holes, cracks, or surface peeling, and possess a dense, homogeneous internal microstructure. Thanks to precise alloying ratios and hot/cold forging processes, the rods achieve a silver-like appearance without the need for silver plating, while offering high strength and excellent environmental adaptability. Distinct from standard brass or pure copper rods, they combine decorative appeal with functional performance, serving as a high-end base material for sectors such as precision manufacturing, electronics and electrical engineering, marine engineering, and medical devices. Their hardness and strength can be adjusted through cold-working processes to meet diverse requirements for precision deep processing.
| White Copper alloy series composition,%max | |||||||
| Type | Cu+Ag（%） | Pb（%） | Fe（%） | Ni+Co（%） | Mn（%） | Zn（%） | Other（%） |
| C71000 | Other | 0.05 | 0.5-1.0 | 19.0-23.0 | 1 | 1 | - |
| C70400 | Other | 0.05 | 1.3-1.7 | 4.8-6.2 | 0.3-0.5 | 1 | - |
| C70800 | Other | 0.05 | 0.1 | 10.5-12.5 | 0.15 | 0.2 | - |
| C75200 | Other | 0.05 | 0.1 | 10.5-12.5 | 0.15 | 0.2 | Other |
| Low nickel white copper | 59.0-60.0 | ≤0.009 | ≤0.3 | 5.0-6.0 | - | - | - |
| BZn8-30 | 58.0-59.0 | ≤0.009 | ≤0.3 | 6.5-7.2 | - | - | - |
| BZn8-25 | 60.0-61.0 | ≤0.009 | ≤0.3 | 6.8-7. 5 | - | - | - |
| BZn10-25 | 60.0-61.0 | ≤0.009 | ≤0.3 | 8. 5-9.3 | - | - | - |
| BZn12-23 | 60.0-61.0 | ≤0.009 | ≤0.3 | 11.0-11.8 | - | - | - |
| BZn15-20 | 61.0-62.0 | ≤0.009 | ≤0.3 | 13.5-14.3 | - | - | - |
| BZn18-20 | 61.0-62.0 | ≤0.009 | ≤0.3 | 16.5-17.3 | 0.2-0.3 | - | - |
| BZn18-18 | 61.0-62.0 | ≤0.009 | ≤0.3 | 18.0-18.6 | 0.2-0.3 | - | - |
| BZn22-18 | 60.0-61.0 | ≤0.009 | ≤0.3 | 20.5-21.3 | 0.3-0. 35 | - | - |
| BZn25-18 | 56.0-57.0 | ≤0.009 | ≤0.3 | 23.5-24.3 | 0.35-0.4 | - | - |
To meet the processing requirements of various industries, we offer both readily available stock in standard specifications and custom production for non-standard sizes. All products feature precise dimensions and stable performance; specific parameters are as follows:
1. Common Grades: BZn15-20, BZn18-18, BZn12-26, C7541, C7701
2. Diameter Range: Φ8mm–Φ180mm (customization available for miniature precision rods and large-diameter solid rods)
3. Standard Lengths: 1000mm–6000mm; custom cutting to specific lengths or small-batch/piece cutting available
4. Supply Temper: Soft (M), Half-hard (H/2), Hard (H); hardness can be customized based on processing needs
5. Surface Finish: Natural/As-produced
6. Standards: GB/T 4423-1992 (National Standard); third-party material testing supported
1. Superior Appearance and Finish: Features a natural silvery-white matte metallic finish with enduring luster; it can achieve a mirror-like polish. The surface is smooth and flat, offering high dimensional accuracy and strict tolerance control. Ready for immediate use without secondary grinding, it is ideal for high-end decorative applications and precision component manufacturing.
2. Stable Microstructure: Produced via vacuum melting and continuous casting, the material boasts a uniform, dense grain structure with extremely low impurity levels. It is free from defects such as porosity or segregation, ensuring consistent material quality and performance across batches, which guarantees stability during subsequent processing.
3. Outstanding Mechanical Properties: Combines high tensile strength with excellent toughness. Standard products exceed 440 MPa in tensile strength, while customized reinforced versions can reach 600 MPa. It offers superior resistance to deformation and fatigue, withstanding repeated bending and stress over the long term without fracturing or warping.
4. Strong Environmental Adaptability: Possesses inherent high-quality passivation properties, eliminating the need for post-production anti-corrosion treatments. It performs reliably in complex conditions—including ambient temperatures, humidity, mild acids/alkalis, and seawater—demonstrating atmospheric oxidation and salt spray corrosion resistance far superior to standard copper alloy rods.
5. Versatile Processing Capabilities: Exhibits excellent hot and cold forming characteristics, allowing for easy machining—including cutting, stamping, bending, drawing, polishing, and drilling. It is suitable for manufacturing complex, precision-engineered parts and is compatible with high-speed automated processing equipment.
Compared to brass or pure copper rods, nickel-zinc-copper alloy rods feature a stable structural composition. They offer outstanding resistance to oxidation, rust, and seawater salt spray—withstanding neutral salt spray corrosion for over 36 hours. They remain stable during long-term use in humid outdoor, marine, and mildly corrosive chemical environments, significantly reducing the frequency of component replacement and lowering operational costs.
Manufactured using standardized precision rolling and cutting processes, these rods feature strictly controlled straightness, roundness, and dimensional tolerances. They offer flat, burr-free end faces and a smooth surface finish, minimizing issues such as edge chipping, deformation, or scrap during processing. They are ideal for the mass production of high-precision components, effectively increasing the yield rate of finished parts.
These rods offer a balance of electrical and thermal conductivity, elasticity, wear resistance, and corrosion resistance. They combine the high strength required for structural metal components with the stable conductivity needed for precision electronic parts. Their multi-functional nature allows them to replace various single-property copper materials, thereby reducing material selection costs.
The product is non-magnetic and free from hazardous substances, complying with industrial environmental standards. The material is safe and non-toxic, making it suitable for demanding high-end applications such as medical devices, food-contact decorative elements, and precision instruments, ensuring safe and worry-free use.
No secondary processing—such as silver plating or anti-corrosion coating—is required; the material's inherent appearance and performance meet high-end requirements. Compared to premium materials like pure silver or stainless steel, the cost is lower, offering a superior overall cost-performance ratio compared to similar alloy products.
High Strength: Delivers superior mechanical strength, making the white copper rod highly reliable for heavy-duty manufacturing and load-bearing applications.
Corrosion Resistance: Performs exceptionally well in humid and corrosive environments, ensuring long-term stability for exposed components.
Customization: Available in multiple shapes, dimensions, and specifications to precisely match diverse industrial processing requirements.
Good Plasticity: Demonstrates excellent formability, allowing for efficient processing and shaping under both hot and cold conditions.
Superior Surface Finish: Provides a high-quality, defect-free surface that meets strict aesthetic and functional standards for precision parts.
Poor Weldability: Please note that this specific material has poor weldability and is not suitable for manufacturing processes that require welding operations.
Instrument parts: Used to manufacture parts of precision instruments, such as sliders on potentiometers, etc.
Medical instruments: Used to manufacture medical instruments, such as surgical instruments, etc.
Telecommunication parts: Used for electromagnetic shielding housings of electronic devices, such as crystal oscillator housings.
Artworks: Because of its beautiful silvery-white appearance, it is often used to make artworks and jewelry.
Parts in wet and corrosive environments: Suitable for parts working in wet and corrosive environments.
Leveraging their excellent comprehensive properties, nickel-silver rods are widely used in fields such as precision industrial manufacturing, high-end decoration, and specialized equipment. Key application scenarios include:
1. Electronics and Electrical Industry: Used for conductive, elastic components—such as precision connectors, relay springs, micromotor commutators, potentiometer wipers, and electronic sensor housings—ensuring the long-term, stable operation of electronic devices through reliable conductivity and fatigue resistance.
2. Precision Instruments: Suitable for precision, wear-resistant components like watch gears, optical instrument brackets, instrument Bourdon tubes, and LCD oscillator housings; their dimensional stability and resistance to deformation ensure measurement accuracy.
3. Marine and Chemical Engineering: Used to manufacture valves for seawater desalination equipment, marine instrument fittings, seawater pipeline connectors, and biofouling-resistant structural parts; they withstand seawater corrosion and humid, salt-laden environments, making them ideal for long-term marine operations.
4. Medical Device Industry: Used for surgical instrument handles, endoscope accessories, precision medical connectors, and more; the material is eco-friendly, non-toxic, resistant to high-temperature sterilization and corrosion, and meets standards for medical device materials.
5. High-end Decoration and Consumer Goods: With an aesthetic, silver-like appearance, the material is used for premium tableware, jewelry accessories, architectural trim, musical instrument parts, locks, and eyeglass frames, maintaining a lasting luster without oxidizing or tarnishing.
6. Mechanical Hardware Manufacturing: Used for precision springs, wear-resistant bushings, fasteners, and custom-shaped hardware fittings; offering high strength, deformation resistance, and durability, they are suitable for various precision mechanical transmission structures.
1. Professional Protective Packaging: Features a thickened outer film layer, reinforcement with sturdy cartons or wooden frames, and solid wood palletizing; this ensures complete protection against moisture, oxidation, impact, scratches, and deformation during transit.
2. Flexible Shipping Options: Direct shipment of in-stock items from multiple locations nationwide, with on-demand delivery available for remote areas; supports packaging for international sea and air freight to meet the procurement needs of both domestic and overseas clients.
3. Delivery Services: Timely delivery of custom-specified products, with end-to-end shipment tracking.
DETONG follows strict quality control standards throughout the production process. Each batch of white copper rods is tested for dimensional accuracy, surface quality, and mechanical strength. These rods undergo rigorous inspections to ensure they meet international standards, including ASTM and ISO certifications. The company employs advanced technology and skilled professionals to guarantee high-quality products.
A1: White copper rods are widely used in the production of precision instrument parts, medical instruments, telecommunications components, and corrosion-resistant parts for electronics.
A3: The white copper rod contains between 5.0% and 6.0% zinc and 19.0% to 23.0% nickel, providing excellent strength and corrosion resistance.
A4: While the white copper rod has good strength and corrosion resistance, it is not ideal for welding. It is better suited for applications that do not require welding.
1. Precision Instrument Manufacturer: We have been purchasing this nickel silver rod in bulk for a long time; the material is exceptionally stable, with consistent performance and color across batches. It is free from porosity or cracks, ensuring the precision of machined gears and instrument components. Its excellent fatigue resistance has significantly reduced equipment failure rates, offering far better value for money than previous suppliers.
2. Marine Component Processor: Used specifically for marine parts, this material offers outstanding resistance to salt spray corrosion; it showed no signs of oxidation or rust after over six months of outdoor exposure to seawater. The dimensional tolerances are precise, eliminating the need for rework and greatly saving on machining time—the quality is highly reliable.
3. High-End Decorative Products Supplier: The material boasts a premium silvery-white finish and looks stunning after polishing; finished ornaments and decorative strips retain their luster, resisting tarnishing or fading. It is eco-friendly and odorless, earning excellent customer feedback. The custom cutting service is also attentive, ensuring precise dimensions with zero material waste.
4. Electronic Components Enterprise: Available in both soft and hard tempers, the material is suitable for the stamping and bending processes required for our various parts. It offers excellent formability—resisting cracking or deformation—and stable electrical conductivity. We achieve high yields in mass production, and the supply is consistent and reliable, making for a worry-free long-term partnership.
