AMS 4590 Nickel Aluminum Bronze
Nickel Aluminum Bronze offers high ductility, high electrical and thermal conductivity, high impact strength, good creep resistance, ease of welding, and low volatility under high vacuum.
Volume: 0
Nickel Aluminum Bronze offers high ductility, high electrical and thermal conductivity, high impact strength, good creep resistance, ease of welding, and low volatility under high vacuum.
Volume: 0
(AMS 4590 | QQ-C-465 | ASTM B148 C95800 | Mil-B-24480)
Cu 81% · Al 9% · Ni 5% · Fe 4% · Seawater Champion · Zero Failures in Combat Systems
Product Overview: The Naval Superalloy
Specified by General Dynamics for submarine propellers and Northrop Grumman for aircraft carrier components, AMS 4590 sets the gold standard for critical marine applications. This nickel-modified aluminum bronze withstands 25+ years in hyper-saline and high-velocity seawater environments, outperforming standard alloys in cavitation erosion resistance. Its battle-proven composition prevents stress-corrosion cracking (SCC) while maintaining 690 MPa tensile strength – the Pentagon’s preferred alloy for seawater systems since 1987.
Technical Parameters
| Property | AMS 4590 Value | C95500 | 316L SS |
|---|---|---|---|
| Composition | Cu 79-85% | Cu 79% | Fe 65% |
| Al 8.5-9.5% | Al 11% | Cr 17% | |
| Ni 4.0-5.5% | Ni 5% | Ni 13% | |
| Tensile Strength | 690 MPa | 725 MPa | 485 MPa |
| Seawater Corrosion Rate | 0.008 mm/yr | 0.03 mm/yr | 0.10 mm/yr |
| Cavitation Erosion | 15 mg/hr (ASTM G32) | 45 mg/hr | 60 mg/hr |
| Thermal Conductivity | 40 W/m·K | 42 W/m·K | 16 W/m·K |
| Max Service Temp | 425°C (797°F) | 260°C (500°F) | 425°C (797°F) |
Certifications: ASME SB148. NACE MR0175. Mil-B-24480. DNVGL-CP-039. ABS Grade 9
5 Dominant Advantages
Extreme Cavitation Resistance
5x longer service life in pump impellers vs. standard aluminum bronze (per NAVSEA tests).
Ballistic Impact Strength
Withstands 9mm rounds at 10m (MIL-STD-662F V50 rating: 1.850 ft/s).
Sulfide Stress Cracking Immunity
NACE TM0177 Method A certified for sour gas service.
Magnetic Permeability <1.05
Critical for minesweeping vessels and sonar systems.
Hot Workability
Forgeable at 700-900°C without cracking.
Mission-Critical Features
Dezincification Resistance: ISO 6509 Class A rating (<100 μm penetration)
Biofilm Resistance: 90% less barnacle adhesion vs. bronze (ISO 22196)
Galvanic Safety: 0.08V potential difference with titanium alloys
Cryogenic Toughness: 85 J Charpy V-notch at -196°C
Radiation Shielding: 40% better gamma ray attenuation than steel
Military-Spec Manufacturing
1 Vacuum Induction Melting
99.9% pure cathode copper + aerospace-grade Al/Ni → argon shrouded pouring
2 Ceramic Mold Casting
Investment casting for complex geometries (tolerance: ±0.13mm/mm)
3 Solution Treatment
925°C × 2hr → water quench for martensitic transformation
4 Precipitation Aging
575°C × 8hr → controlled cooling to HRC 28-32
5 Non-Destructive Testing
100% UT + RT per ASTM E164/E94 + liquid penetrant (AMS 2644)
Defense & Industrial Applications
| Sector | Critical Components | Compliance |
|---|---|---|
| Naval Defense | Propellers, seawater valves, sonar domes | Mil-B-24480. DOD-STD-1687 |
| Aerospace | Landing gear bushings, actuator systems | AMS 4590. AS7114 |
| Power Generation | Nuclear reactor coolant pumps | ASME III, RCC-M Rx Level 1 |
| Offshore Oil | Christmas tree valves, BOP components | API 6A, NACE MR0175 |
| Desalination | Reverse osmosis pump shafts | ASTM A990. EN 10204 3.1 |
Top Search Keywords:
AMS 4590 distributor | Nickel aluminum bronze propeller | Mil-B-24480 bronze | Cavitation resistant alloys
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