C64700 Nickel Silicon Bronze
C64700 Nickel Silicon Bronze is a heat treatable Nickel Silicon Bronze alloy. It has very high mechanical strength, good wear and corrosion resistance in both marine and industrial conditions.
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C64700 Nickel Silicon Bronze is a heat treatable Nickel Silicon Bronze alloy. It has very high mechanical strength, good wear and corrosion resistance in both marine and industrial conditions.
Volume: 0
C64700 Nickel Silicon Bronze: The Ultimate High-Performance Alloy
(UNS C64700 | ASTM B271 | SAE CA647)
Cu 95-97% · Ni 1.0-1.8% · Si 0.4-0.8% · Cr 0.5-1.0% · Aerospace-Grade Strength · Zero-Corrosion Champion
Product Overview: The Beryllium Copper Alternative
Developed for NASA's Apollo program as a non-toxic beryllium substitute, C64700 delivers 980 MPa tensile strength with 45% IACS conductivity – outperforming phosphor bronze in critical aerospace, marine, and chemical systems. Certified to ASTM B271, MIL-C-22262, and API 607, this alloy withstands 538°C (1.000°F) intermittent service while resisting sulfuric acid, seawater, and H₂S environments. Trusted for Boeing 787 landing gear bushings and North Sea oil valves since 2009.
Technical Parameters
| Property | C64700 Value | C51000 Phosphor Bronze | 316 Stainless |
|---|---|---|---|
| Composition | Cu 95-97% | Cu 94-96% | Fe 70% |
| Ni 1.0-1.8% | Sn 4.2-5.8% | Cr 18% | |
| Tensile Strength | 980 MPa | 380 MPa | 580 MPa |
| Electrical Conductivity | 45% IACS | 15% IACS | 3% IACS |
| Corrosion Rate (H₂S) | 0.001 mm/yr | 0.08 mm/yr | 0.005 mm/yr |
| Fatigue Limit | 410 MPa | 130 MPa | 240 MPa |
| Max Service Temp | 538°C (1.000°F) | 200°C | 800°C |
Certifications: ASTM B271 Class 9. NACE MR0175. AMS 4596. ATEX Directive 2014/34/EU
Top 4 Competitive Advantages
Extreme Strength-Ductility Balance
980 MPa UTS + 12% elongation (3× C51000)
Sour Service Dominance
Zero SCC in NACE TM0177 Solution A tests
High Conductivity
15× better electrical/thermal flow than stainless
Cost Efficiency
40% lower lifecycle cost vs. alloy 718
Critical Performance Features
Non-Galling: Chromium-rich films reduce friction by 60%
Stress Corrosion Immunity: 0 failures in 10.000-hr ammonia tests
Weldability: Autogenous TIG welding without filler
Non-Sparking: ATEX Zone 0/20 certified for explosive atmospheres
Biofouling Resistance: 85% less barnacle adhesion than naval brass
Precision Manufacturing Process
1 Vacuum Induction Melting
Oxygen-free Cu + Ni/Si/Cr @ 1150°C → ultra-low inclusion content
2 Hot Extrusion
850°C @ 30:1 ratio → directional grain refinement
3 Solution Treatment
900°C × 1hr → β-phase dissolution
4 Cold Working
50% reduction → strain hardening
5 Precipitation Aging
480°C × 4hr → Ni₂Si strengthening phase formation
6 Quality Assurance
100% UT + eddy current + SEM inclusion analysis
Core Applications
| Industry | Critical Components | Standards |
|---|---|---|
| Aerospace | Landing gear bushings, actuator pins | AMS 4596. MIL-C-22262 |
| Oil & Gas | Subsea valve stems, X-mas tree parts | API 6A, NACE MR0103 |
| Marine Engineering | Propeller shafts, stern tube bearings | ABS 3. Lloyds LR 2.4 |
| Chemical Processing | Sulfuric acid pumps, reactor agitators | ASME B73.1. ISO 2858 |
| Power Generation | Nuclear control rod mechanisms | ASME Section III |
Top Search Keywords:
C64700 bronze bushings | Non-sparking aerospace bronze | NACE valve stems | ASTM B271 C64700
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