C79200 Leaded Nickel Silver, also known as nickel silver or German silver, is a copper-based alloy containing nickel and often lead, which provides excellent corrosion resistance, high strength, and good ductility, commonly used in marine applications, decorative items, and precision castings due to its silver-like appearance and performance.
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When coastal railings corrode in months and luxury yacht fittings demand flawless finishes, C79200 Leaded Nickel Silver steps in. This ‘white bronze’ (55% Cu, 27% Zn, 12% Ni, 3% Pb) masquerades as sterling silver while shrugging off salt spray, acid rain, and fingerprint tarnish. ASTM B151-certified – it’s the hidden champion in oceanfront architecture, marine hardware, and precision instruments demanding elegance without compromise.
TECH SPECS: ENGINEERED ELEGANCE
(ASTM B151 / UNS C79200 / DIN 2.0810)
| Property | C79200 | 304 Stainless | C36000 Brass |
|---|---|---|---|
| Composition | 55% Cu, 27% Zn, 12% Ni, 3% Pb | 18% Cr, 8% Ni | 61.5% Cu, 35.5% Zn, 3% Pb |
| Tensile Strength | 380 MPa (55 ksi) | 505 MPa | 340 MPa |
| Corrosion Rate | 0.003 mm/yr (ASTM G85 salt fog) | 0.001 mm/yr | 0.08 mm/yr |
| Machinability | 85% (free-cutting) | 45% | 100% |
| Thermal Expansion | 18.7 μm/m°C | 17.3 μm/m°C | 20.5 μm/m°C |
| Color Stability | No tarnish @ 5 yrs (coastal) | Permanent | Greens in 6 mos |
Certifications: ASTM B151. RoHS 2011/65/EU (exempt), REACH Annex XVII
5 REASONS DESIGNERS SPECIFY IT
Saltwater Immunity
"Survives Miami beachfront exposure for 10+ years – zero green corrosion on yacht cleats."
Luxury Aesthetics
"Mirror-polishes to 0.1μm Ra – indistinguishable from sterling silver at 1/3 the cost."
Machining Superstar
"Drills 3x faster than stainless steel – slashes CNC time for complex architectural grilles."
Low-Maintenance
"Resists fingerprint stains – ideal for elevator panels in humid climates."
Cost Genius
"40% cheaper than marine-grade stainless with equal corrosion resistance in splash zones."
KEY FEATURES: ENGINEERED FOR DEMANDING ENVIRONMENTS
Lead-Enhanced Machining: Self-lubricating Pb particles prevent tool wear during high-speed milling
Acid Rain Resistance: Withstands pH 4.0 environments (industrial/marine zones)
Non-Sparking: Meets ATEX Directive 2014/34/EU for explosive atmospheres
Weldability: Accepts TIG welding for seamless fabrications
PRECISION PROCESSING: ARTISAN METALLURGY
1 Controlled Atmosphere Melting
"Induction-melted under argon shield – prevents zinc volatilization (±0.5% chemistry control)."
2 Continuous Casting
"Extruded rods/tubes with uniform grain structure (ASTM E112 grain size 7)."
3 Cold Drawing
"Precision-drawn to ±0.05mm tolerances for instrument components."
4 Stress Relieving
"450°C anneal eliminates machining distortion in optical mounts."
WHERE IT EXCELS: CORROSION-PROOF ELEGANCE
| Industry | Signature Applications | Performance Edge |
|---|---|---|
| Marine | Yacht cleats, radar housings | Zero pitting after 15+ years in seawater |
| Architecture | Coastal balcony rails, facade cladding | Maintains reflectivity in UV/salt spray |
| Medical | Surgical instrument handles | Autoclavable & biocompatible (ISO 13485) |
| Optics | Telescope focusers, laser mounts | Thermal stability holds micron alignment |
| Industrial | Chemical valve stems, food processing | Resists acetic acid & chlorides |
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