C64200 Silicon Aluminum Bronze is an engineering alloy at least as resistant to corrosion as copper itself, but much stronger. CDA 642 bronze is manufactured mostly in the form of round, hexagonal, and octagonal rods for hot forming and free machining.
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C64200 Silicon Aluminum Bronze: Ultimate Wear-Resistant Alloy
(UNS C64200 | ASTM B271 | SAE 68B)
Cu 88-91% · Al 6-8% · Si 2-4% · Fe 1.5-2.5% · Corrosion Warrior · Zero-Maintenance Champion
Product Overview: The Heavy-Duty Performer
Trusted by the U.S. Navy since 1972 for submarine shafting, C64200 combines aluminum bronze’s strength with silicon’s corrosion resistance. This alloy withstands 500°F (260°C) steam environments and 30-knot seawater flow while delivering 2× the fatigue life of nickel-aluminum bronzes. Certified to ASTM B271, MIL-B-24480, and ASME SB150, it powers critical systems in nuclear reactors, desalination plants, and offshore platforms exposed to extreme abrasion and chemical attack.
Technical Parameters
| Property | C64200 Value | C63000 Bronze | 316 Stainless |
|---|---|---|---|
| Composition | Cu 88-91% | Cu 82% | Fe 70% |
| Al 6-8% | Al 10% | Cr 18% | |
| Tensile Strength | 760 MPa | 650 MPa | 580 MPa |
| Corrosion Rate (SW) | 0.003 mm/yr | 0.008 mm/yr | 0.002 mm/yr |
| Wear Resistance | 0.15 mm³ loss | 0.35 mm³ | 0.25 mm³ |
| Thermal Conductivity | 52 W/m·K | 45 W/m·K | 16 W/m·K |
| Max Service Temp | 425°C (800°F) | 290°C | 800°C |
Certifications: ASTM B271 Class 4. NACE MR0175. ASME Boiler Code, DNV GL OS F101
Top 4 Competitive Advantages
Extreme Wear Resistance
58% lower wear rate than C95400 (ASTM G65)
Acid/Caustic Immunity
Withstands pH 2-12 at 150°C without pitting
Fatigue Strength
340 MPa at 10⁸ cycles (2× C63000)
Zero Lubrication
Self-lubricating silicon films reduce friction by 40%
Critical Performance Features
Biofouling Resistance: 90% less barnacle adhesion vs. copper alloys
Cavitation Erosion Defense: 4× longer life than CA104 bronze
Non-Sparking: ATEX/IECEx Zone 0 certified
Thermal Shock Tolerance: Withstands 250°C/minute gradients
Non-Magnetic: Permeability <1.02 μ
Advanced Manufacturing Process
1 Vacuum Arc Remelting
Electrolytic Cu + Aerospace-grade Al/Si @ 1250°C
2 Hot Forging
850°C @ 60% reduction → directional grain flow
3 Solution Treatment
780°C × 4hr → β-phase homogenization
4 Aging
480°C × 8hr → precipitate κ-phase hardening
5 Quality Assurance
100% UT + hardness mapping + spectrographic analysis
Core Applications
| Industry | Critical Components | Standards |
|---|---|---|
| Marine Engineering | Propeller shafts, stern tubes | ABS 3. Lloyds LR 2.4 |
| Power Generation | Desalination pump impellers, valves | ASME B73.1. API 610 |
| Chemical Processing | Reactor agitators, acid transfer lines | ASTM A276. NACE MR0103 |
| Aerospace | Landing gear bushings, actuators | AMS 4890. MIL-B-24480 |
| Mining | Slurry pump volutes, dredge components | ISO 13359. AS 2417 |
Top Search Keywords:
C64200 bronze bushings | Aluminum bronze seawater pumps | Non-sparking C64200 | ASTM B271 rods
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