(UNS C61400 | ASTM B148 | SAE CA614 | DIN 1705)
91% Cu · 7% Al · 2% Si · Seawater Champion · High-Fluidity Casting Alloy
Product Overview: The Seawater Specialist
When Flowserve designs pump impellers for desalination plants or Wärtsilä engineers marine gear components, they specify C61400 Aluminum Bronze. This unique silicon-aluminum bronze delivers 40% better casting fluidity than standard aluminum bronzes while offering exceptional corrosion resistance in chlorinated and sulfide environments. Its optimized composition withstands 15+ years in offshore applications, reducing maintenance costs for critical infrastructure.
Technical Parameters
| Property | C61400 Value | C95400 Bronze | 316 Stainless |
|---|
| Composition | Cu 90-92% | Cu 85% | Fe 67% |
| Al 6.0-8.0% | Al 11% | Cr 17% |
| Si 1.5-2.5% | Fe 4% | Ni 12% |
| Tensile Strength | 585 MPa | 620 MPa | 515 MPa |
| Corrosion Rate | <0.025 mm/yr (seawater) | 0.03 mm/yr | 0.05 mm/yr |
| Castability Index | 92/100 | 75/100 | N/A |
| Thermal Conductivity | 45 W/m·K | 42 W/m·K | 16 W/m·K |
| Max Service Temp | 400°C (752°F) | 260°C (500°F) | 870°C (1600°F) |
|
|
|
|
Certifications: ASTM B148. NACE MR0175. ABS Type 3. Lloyd's Register, NSF-61
3 Competitive Advantages
Superior Castability
Silicon addition enables thin-wall casting (down to 3mm) with 30% fewer defects vs. C95500.
Biofouling Resistance
Natural antimicrobial properties reduce barnacle growth by 70% (per ISO 22196).
Impact Toughness
110 J Charpy impact strength at -40°C – ideal for Arctic offshore installations.
Critical Performance Features
Dezincification Immunity: Passes ISO 6509 Method B (Class A rating)
Cavitation Resistance: 3x longer service life in pump impellers vs. cast iron
Stress Relief Capability: Self-annealing at 275°C eliminates distortion risks
Galvanic Compatibility: 0.15V potential difference with 316L stainless steel
Advanced Manufacturing Process
1 Argon-Shielded Melting
95% recycled copper + Al/Si master alloy → 1.100°C controlled oxidation.
2 Sand Casting
No-bake molds for complex geometries (min. 3mm wall thickness).
3 Solution Treatment
Heat to 675°C → water quench for β-phase transformation.
4 Aging & Stress Relieving
Precision aging at 550°C for 4 hours.
5 Final Machining
Ceramic inserts @ 180 m/min + high-pressure coolant.
Core Application Fields
| Industry | Critical Components | Compliance Standards |
|---|
| Marine Engineering | Propeller hubs, seawater valves | ABS Type 3. DNVGL-CP-0429 |
| Water Treatment | Desalination pump casings, chlorine injectors | NSF-61. WRAS |
| Power Generation | Cooling water systems, turbine bushings | ASME B31.1. EN 12516 |
| Chemical Processing | Acid transfer pumps, agitator shafts | NACE MR0175. ASME B73.1 |
| Transportation | High-load bearings, suspension parts | ASTM F519. MIL-B-24480 |
Top Search Keywords:
C61400 bronze price | Aluminum bronze seawater valves | Castable bronze alloy | ASTM B148 C61400
Let's Talk About Your Project!
Please Feel free to give your inquiry in the form below. We will reply you in 24
hours.
