C97600 Nickel Silver Bronze, also referred to as dairy metal or dairy bronze, is a cast bronze alloy with a high machinability rating of 70. C976 Dairy Bronze contains 63-67% Cu, 3.5-4.5 % Sn, 3-5% Pb, 3-9% Zn, 1.5% Fe, 19-21.5% Ni, 1% Mn, and 0.15% Si.
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C97600 Nickel Silver Bronze: Premium Corrosion-Resistant Alloy
(ASTM B122 C97600 | UNS C97600 | CuNi18Zn27)
Cu 55% · Ni 18% · Zn 27% · Silver Finish · Marine-Grade Durability
Product Overview: The Versatile Workhorse
Trusted by Siemens for electrical components and Caterpillar for marine fittings, C97600 delivers exceptional corrosion resistance with a polished silver appearance. This lead-free nickel silver bronze withstands harsh marine atmospheres, industrial chemicals, and high-wear environments. With ISO 9001-certified manufacturing, it serves critical roles from shipbuilding to architectural hardware, offering superior strength-to-weight ratio compared to brass alloys.
Technical Parameters
| Property | C97600 Value | C77000 Brass | 316L Stainless |
|---|---|---|---|
| Composition | Cu 54-60% | Cu 55% | Fe 65% |
| Ni 16.5-19.5% | Ni 12% | Cr 17% | |
| Zn 26-31% | Zn 33% | Ni 13% | |
| Tensile Strength | 380 MPa | 400 MPa | 485 MPa |
| Seawater Corrosion Rate | 0.015 mm/yr | 0.04 mm/yr | 0.10 mm/yr |
| Thermal Conductivity | 50 W/m·K | 120 W/m·K | 16 W/m·K |
| Electrical Conductivity | 7% IACS | 28% IACS | 2% IACS |
| Hardness | HB 110 | HB 90 | HB 150 |
Certifications: ASTM B122. RoHS/REACH, EN 12164. NSF/ANSI 61
Top 4 Advantages
Marine Corrosion Champion
3x longer lifespan in salt spray vs. standard brass (ASTM B117: 2000+ hours)
Aesthetic Silver Finish
Mirror-polish capability (Ra 0.1μm) without plating
Stress-Corrosion Immunity
Zero cracking in ammonia vapor tests per ASTM G36
Superior Formability
45% bend radius improvement vs. C77000 at 0.5mm thickness
Key Performance Features
Lead-Free Compliance: <0.01% Pb content exceeds EU Directive 2023/1907
Biofouling Resistance: 80% less barnacle adhesion (ISO 22196)
Low Magnetic Permeability: μ<1.02 for electronics/medical applications
Fatigue Strength: 180 MPa at 10⁷ cycles (rotary components)
Cryogenic Stability: Maintains ductility at -196°C
Precision Manufacturing Process
1 Induction Melting
99.97% pure copper + electrolytic Ni/Zn → argon-protected pouring
2 Continuous Casting
Vertical casting for defect-free slabs (1600°C → 650°C/min cooling)
3 Hot Rolling
800°C reduction (90% thickness reduction)
4 Cold Working
Multiple-pass rolling/tempering for H08 temper
5 Surface Finishing
Electrolytic polishing → ultrasonic cleaning
QC: 100% eddy current testing per ASTM E309
Core Applications
| Industry | Typical Components | Standards |
|---|---|---|
| Marine Engineering | Deck hardware, valve stems | ABS Type 8. Lloyds Reg |
| Electronics | Connectors, relay contacts | IEC 60394. MIL-C-1058 |
| Architecture | Door handles, decorative fixtures | ANSI/BHMA A156.18 |
| Medical Devices | Surgical instrument bodies | ISO 13485. ASTM F2063 |
| Automotive | Fuel system components, bushings | SAE J461. ISO 15510 |
Top Search Keywords:
C97600 distributor | Nickel silver bronze fittings | Marine-grade bronze | Lead-free architectural bronze
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