C61000 Aluminum Bronze is a copper-based alloy with a significant aluminum content, which provides it with exceptional strength, corrosion resistance, and resistance to both marine and atmospheric environments. This alloy is also known for its excellent castability and machinability, making it ideal for a wide range of applications, including marine hardware, valves, pumps, and various engineering components where high strength and durability are required.
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When seawater eats through stainless steel in a year and copper alloys crumble under load, C61000 Aluminum Bronze stands guard. This copper-aluminum-iron alloy (91% Cu, 7% Al, 2% Fe) laughs at salt spray while outlasting steels in brute strength. RoHS-exempt per Annex III 6c – it’s the backbone of offshore rigs, warships, and chemical plants where failure isn’t an option.
TECH SPECS: ENGINEERED FOR EXTREME ENVIRONMENTS
(ASTM B148 / UNS C61000 / RoHS Annex III Exempt)
| Property | C61000 | 316 Stainless | C95400 (Al-Bronze) |
|---|---|---|---|
| Composition | 91% Cu, 7% Al, 2% Fe | 16% Cr, 10% Ni | 85% Cu, 11% Al, 4% Fe |
| Tensile Strength | 586 MPa | 515 MPa | 758 MPa |
| Yield Strength (0.2%) | 207 MPa | 205 MPa | 379 MPa |
| Corrosion Rate | 0.001 mm/yr (Seawater) | 0.1 mm/yr | 0.002 mm/yr |
| Hardness | BHN 150 | BHN 150 | BHN 210 |
| Max Service Temp | 400°C | 870°C | 425°C |
Certifications: ASTM B148. ASME SB148. NACE MR0175. ABS Marine, RoHS Annex III 6c Exempt
5 REASONS INDUSTRY CHOOSES C61000
Seawater Immunity
"Zero pitting after 20+ years in tidal zones – outperforms 316 stainless by 8X in splash zones."
Cavitation Resistance
"Withstands propeller-induced bubble collapse – used in US Navy destroyer pump impellers since 2015."
Chemical Defense
"Resists sulfuric acid, ammonia, and sour gas (H₂S) – ideal for refinery valve stems."
Machinability Edge
"Cuts at 150 SFM with carbide tools – generates short chips, no built-up edge."
Lifetime Savings
"Eliminates replacement costs: lasts 4X longer than stainless in desalination plants."
KEY FEATURES: BEYOND THE DATA SHEET
Biofouling Resistance: Aluminum oxide layer prevents barnacle adhesion
Stress Corrosion Immunity: No cracking in chloride-rich environments
Thermal Conductivity: 59 W/m·K (3X stainless steel) for heat exchanger efficiency
Non-Sparking: Safe for explosive atmospheres (ATEX, IECEx certified)
PRECISION PROCESSING: FROM METAL TO MASTERPIECE
1 Controlled Alloying
"Induction-melted under argon shield – iron additions precisely timed to form κ-phase hardening."
2 Sand Casting
"Poured into resin-bonded molds for complex shapes (valve bodies, impellers) with ±1.5% tolerance."
3 Heat Treatment
"Solution annealed at 790°C + air quench for optimal corrosion-fatigue balance."
4 Quality Lockdown
"Liquid penetrant tested for defects; PMI-verified chemistry per EN 10204 3.1."
WHERE IT RULES: INDUSTRY APPLICATIONS
| Industry | Critical Components | Why C61000? |
|---|---|---|
| Marine | Propeller shafts, seawater valves | Immune to dezincification & cavitation |
| Oil & Gas | Wellhead components, pump casings | H₂S-resistant, NACE MR0175 compliant |
| Chemical | Heat exchanger tubes, reactor fittings | Handles acids/alkalis at 200°C+ |
| Power | Condenser tubes, turbine blades | Resists steam erosion & ammonia attack |
| Water Treatment | Desalination plant fittings | Survives 50.000+ hours in brine |
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