Suitable for precision spring clips, decorative hardware, shielding parts, connectors, instrument parts, eyeglass accessories, and copper alloy functional parts requiring a silver-white appearance and certain elasticity.
BZn18-18 Nickel Silver is a copper-nickel-zinc alloy material, usually composed of copper, nickel, zinc, and other elements, with a silver-white or pale grayish-white metallic appearance. It has good corrosion resistance, elasticity, cold workability, decorative properties, and a certain level of strength. It is commonly used in precision spring clips, shielding parts, connectors, eyeglass accessories, instrument parts, decorative hardware, musical instrument accessories, and copper alloy parts requiring a silver-white appearance. Compared to ordinary Brass, BZn18-18 is closer in color to silver-white, with better corrosion resistance and elasticity; Compared toPure Copperand oxygen-free copper, it has weaker electrical and thermal conductivity, but better strength and decorative appearance.
By focusing on application scenarios, boundaries of advantages, and non-recommended scenarios, it helps sales, customer service, and quoting staff quickly determine whether the material meets current part requirements.
It has a silver-white metal appearance, good corrosion resistance, good elasticity, good cold workability, good decorative value, strength higher thanPure Copper, suitable for thin elastic parts, stamping and bending, and precision hardware and instrument parts.
Precision spring clips, shielding pieces, connecting pieces, contact pieces, instrument parts, eyeglass frame accessories, decorative hardware, musical instrument accessories, nameplates, elastic clips, metal panels, craft accessories, low to medium strength elastic parts, silver-white appearance parts, electronic hardware parts.
High-conductivity copper busbars, high thermal conductivity heat dissipation components, high-strength load-bearing structural components, highly wear-resistant moving parts, high-elastic long-life spring parts, food direct contact parts, medical implants, wearable parts sensitive to nickel allergy risk, strong acid and strong alkali environment parts, low-cost ordinary copper parts, electronic components requiring the highest conductivity.
The following parameters come from product information and material knowledge fields, used for design review, quotation communication, and preliminary judgment before material selection.
| Material positioning | Suitable for precision spring clips, decorative hardware, shielding parts, connectors, instrument parts, eyeglass accessories, and copper alloy functional parts requiring a silver-white appearance and certain elasticity. |
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| Precision performance | BZn18-18 Nickel Silver suitable for stamping, etching, bending, CNC machining, drilling, and precision sheet processing. Planar profiles, hole positions, and spring structure can achieve better machining accuracy, but the angle, elasticity, and springback after bending are affected by material condition, plate thickness, rolling direction, die, and post-processing. Surface and elastic parts should be controlled separately for surface quality, key dimensions, and elastic force range. |
| Dimensional tolerances | Conventional dimensional tolerances for CNC machining BZn18-18 Nickel Silver can be referenced ± 0.02mm to ±0.10mm, while ordinary stamped or etched parts can be evaluated at ±0.05mm to ±0.20mm. The overall size and angle of bent spring pieces are affected by springback, material condition, and plate thickness. These values represent the standard reference range and are not absolute guaranteed tolerances for all structures. Elasticity, contact height, and key assembly dimensions should be separately defined as inspection standards. |
| Minimum Wall Thickness | BZn18-18 Nickel Silver are commonly used in the form of sheets, strips, and thin sheets. Precision spring pieces and decorative sheets can use thinner sheets, with common thicknesses ranging from 0.1mm, 0.2mm, 0.3mm to over 1.0mm. For ordinary structural parts, it is recommended that the wall thickness should not be less than 0.5mm-0.8mm; areas requiring threading, riveting, assembly, or under high pressure should be appropriately thickened. |
| Recommended wall thickness | Standard decorative pieces, shielding pieces, and contact pieces can be used as a reference of 0.1mm-0.5mm; medium-elastic clips, connecting pieces, and precision hardware parts can be used as a reference of 0.3mm-1.0mm; CNC machined parts, decorative structural parts, and load-bearing connection positions are recommended to be at least 1.0mm-2.0mm, with specific requirements determined by elasticity, strength, assembly space, and appearance requirements. |
| Minimum aperture | Stamping, etching, or laser machining aperture should be determined based on plate thickness and processing method. For stable design, it is recommended that the hole diameter be no less than one time the plate thickness, and for conventional design, it is recommended not less than 0.5mm-1.0mm. CNC drilling can achieve smaller hole diameters, but deep small holes require consideration of chip evacuation, burrs, and tool strength. Hole positions near the spring's load-bearing area should have margin spacing to prevent fatigue cracks from spreading from the hole edges. |
| Assembly clearance | For ordinary metal assembly, it is recommended to reserve 0.05mm-0.20mm on one side; the structures of precision spring pieces, shielding sheets, clamping pads, and decorative pieces should be designed separately according to the rebound, surface treatment, and assembly methods. If subsequent nickel, silver, gold, tin, or anti-oxidation treatments are needed, additional gaps should be reserved according to the thickness of the coating. Appearance assembly should also consider avoiding scratches and dents. |
| Detailed performance | BZn18-18 Nickel Silver is suitable for producing precision slots, spring silhouettes, decorative textures, brushed surfaces, signage, snap pins, positioning holes, and sheet structural details. Stamping and etching can achieve clearer contours, but overly small sharp corners, narrow bridges, and weak connections can easily cause burrs, deformation, or fatigue risks. Logos and text are recommended to be achieved through etching, laser marking, stamping marking, or silkscreening. |
| Surface effect | BZn18-18 Nickel Silver raw surface usually has a silver-white, grayish-white, or pale silver-yellow metallic texture, and its appearance is closer to stainless steel or silver metal than Brass. Polishing produces a brighter surface, brushing produces a delicate linear texture, and sandblasting produces a soft matte finish. Long-term exposure to air, sweat, or humid environments may cause slight oxidation, darkening, or color differences. Products with high appearance requirements can undergo anti-oxidation, nickel plating, silver plating, or gold plating. |
Based on material characteristics and suitable product ranges, customer needs are broken down into easier application directions to determine.
Precision spring clips, shielding pieces, connecting pieces, contact pieces, instrument parts, eyeglass frame accessories, decorative hardware, musical instrument accessories, nameplates, elastic clips, metal panels, craft accessories, low to medium strength elastic parts, silver-white appearance parts, electronic hardware parts.
Suitable for precision spring clips, decorative hardware, shielding parts, connectors, instrument parts, eyeglass accessories, and copper alloy functional parts requiring a silver-white appearance and certain elasticity.
The main feature of BZn18-18 Nickel Silver is its nearly silver-white color, combining certain strength, elasticity, and corrosion resistance, making it suitable for making thin sheets, spring clips, decorative parts, and precision hardware. Its appearance is more silvery than Brass, and it can present a visual effect similar to stainless steel or silver metal without the need for plating. Due to nickel content, the material has good corrosion resistance and strength, but it is also important to note that some wearable products may have nickel sensitivity or regulatory restrictions.
Based on wall thickness, hole position, assembly clearance, dimensional tolerances, and material usage risks, determine in advance whether the part structure is suitable for BZn18-18 Nickel Silver.
Post-processing of BZn18-18 Nickel Silver affects appearance, dimensions, hole position, assembly clearance, and usage validation results, and should be explained in advance during quotation, DFM review, and sample confirmation stages.
Post-processing should focus on appearance display, dimensional fitting, connection assembly, and testing verification. Parts involving assembly positions need to be reserved in advance for machining, coating, and trial assembly allowances.
For common issues such as threads, snaps, strength, temperature resistance, and weather resistance, identify in advance whether the material needs to be replaced or if another processing method should be used.
When customer demand exceeds BZn18-18 Nickel Silver material boundaries, it is necessary to combine strength, temperature resistance, toughness, long-term stability, and mass production goals to promptly recommend alternative materials or processing technologies.
If higher conductivity is required, Pure CopperT2, TU2 Oxygen-Free Copper, or C18150 Chromium Zirconium Copper can be chosen; If higher elasticity and fatigue life are needed, you can choose beryllium copper C17200, phosphor bronze, or 301 stainless steel; If lower cost and easier cutting performance are required, Brass H62 or HPb59-1 can be chosen; If higher corrosion resistance and structural strength are required, 304 stainless steel or 316 stainless steel can be chosen; If you only want a silver-white appearance, you can choose stainless steel or aluminum alloy sandblasted oxidation or Brass nickel plating solutions.
If customers require a silver-white metallic appearance, good elasticity, superior corrosion resistance, and precision sheet processing capabilities, BZn18-18 Nickel Silver is the appropriate choice. If customers mainly focus on electrical and thermal conductivity, Pure Copperor oxygen-free copper is more suitable; If customers require long-life spring pieces and highly elastic contact parts, beryllium copper or phosphor bronze are more suitable; If the customer's product involves long-term skin contact, export regulations, or nickel release restrictions, material compliance requirements should be confirmed in advance.
After uploading 3D/2D drawings and supplementing materials, quantities, tolerances, surface treatments, and delivery requirements, XPartsLab will provide next steps in 3D printing manufacturability, cost, and delivery pathways.
