C63600 Silicon Aluminum Bronze is a specific grade of bronze alloy characterized by its high silicon content, offering enhanced corrosion resistance, strength, and wear resistance, often utilized in marine environments, chemical processing, and electrical components due to its non-magnetic properties and excellent casting capabilities.
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C63600 Silicon Aluminum Bronze: The Precision Engineer's Choice
(UNS C63600 | ASTM B271 | SAE 65B)
Cu 91-94% · Al 5.5-6.5% · Si 1.5-2.5% · Fe ≤0.25% · Machining Master · Corrosion Defender
Product Overview: The Versatile Performer
Developed for U.S. Navy shipbuilding in the 1960s, C63600 strikes the ideal balance between silicon bronze’s corrosion resistance and aluminum bronze’s strength. With 35% higher machinability than standard bronzes and exceptional thermal conductivity (59 W/m·K), it excels in complex marine fittings, steam systems, and precision bushings. Certified to ASTM B271, ASME SB150, and MIL-C-22262, this alloy withstands 400°F (204°C) continuous service while resisting saltwater corrosion at flow rates up to 15 knots.
Technical Parameters
| Property | C63600 Value | C63000 Bronze | 316 Stainless |
|---|---|---|---|
| Composition | Cu 91-94% | Cu 82% | Fe 70% |
| Al 5.5-6.5% | Al 10% | Cr 18% | |
| Tensile Strength | 620 MPa | 650 MPa | 580 MPa |
| Machinability Rating | 85% (free-cutting) | 20% | 45% |
| Thermal Conductivity | 59 W/m·K | 45 W/m·K | 16 W/m·K |
| Corrosion Rate (SW) | 0.005 mm/yr | 0.008 mm/yr | 0.002 mm/yr |
| Max Service Temp | 400°C (750°F) | 290°C | 800°C |
Certifications: ASTM B271 Class 2. NACE MR0175. AMS 4890. EN 1982
Top 4 Competitive Advantages
Unmatched Machinability
4× faster machining than C63000 (per ASTM E618)
Thermal Management
3.7× better heat dissipation than stainless steel
Marine-Grade Durability
15+ year service life in splash zones
Cost Efficiency
30% lower part cost vs. C64200 due to reduced tool wear
Critical Performance Features
Stress Corrosion Immunity: 0 failures in 5.000-hr ammonia vapor tests
Non-Galling: Silicon-rich films reduce friction by 35%
Weldability: Autogenous TIG welding without preheat
Biofouling Resistance: 70% less marine growth vs. copper alloys
Non-Sparking: ATEX Zone 2 certified
Precision Manufacturing Process
1 Controlled Atmosphere Melting
Oxygen-free Cu + Al/Si additives @ 1100°C under nitrogen
2 Continuous Casting
Electromagnetic stirring → uniform fine-grain structure
3 Hot Extrusion
750°C @ 40:1 ratio → optimized mechanical properties
4 Cold Drawing
30% reduction → enhanced surface finish
5 Quality Validation
100% eddy current testing + ASTM E8/E18 mechanical tests
Core Applications
| Industry | Critical Components | Standards |
|---|---|---|
| Marine Engineering | Seawater valves, pump shafts | ABS 3. Lloyds LR 2.4 |
| Power Generation | Steam turbine bushings, heat exchangers | ASME B31.1. API 610 |
| Automotive | Transmission synchronizers, bearings | SAE J461. ISO 4381 |
| Industrial Machinery | Hydraulic cylinders, gear components | ISO 4378-1. DIN 1709 |
| Chemical Processing | Acid transfer fittings, valve stems | NACE MR0103. ASME B16 |
Top Search Keywords:
C63600 bronze bushings | Machinable silicon bronze | Marine bronze valves | ASTM B271 rods
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