AMS 4881 is offered in solid and hollow bars. The additional heat treating process improves mechanical properties and the strength to weight ratio exceeding the range of typical aluminum bronzes. AMS 4881 is commonly used in applications involving heavy loads abrasion, friction, and deformation at high temperatures.
Volume: 0
AMS 4881 Nickel Aluminum Bronze: High-Strength Cast Alloy for Demanding Environments
(SAE-AMS-4881 | UNS C95800 | CuAl9Ni5Fe4)
Cu 79-85% · Al 8.5-9.5% · Ni 4.0-5.5% · Fe 3.5-5.0% · Saltwater Champion · Zero-Pitting Alloy
Product Overview: Engineered for Extreme Service
Specified by Northrop Grumman for aircraft landing gear components and Shell for offshore valve systems, AMS 4881 nickel aluminum bronze delivers exceptional corrosion resistance and mechanical strength. This investment-cast alloy withstands seawater, acids, and high-stress conditions while offering 3× the cavitation resistance of 316 stainless steel. Compliant with AMS 4881 Rev C, MIL-B-24480. and NACE MR0175 for critical aerospace, marine, and energy applications.
Technical Parameters
| Property | AMS 4881 Value | C95500 Bronze | 316L Stainless |
|---|---|---|---|
| Composition | Cu 79-85% | Cu 86% | Fe 65% |
| Al 8.5-9.5% | Al 10.5% | Cr 17% | |
| Ni 4.0-5.5% | Ni 1.5% | Ni 12% | |
| Tensile Strength | 725-860 MPa | 620 MPa | 485 MPa |
| Seawater Corrosion Rate | 0.018 mm/yr | 0.045 mm/yr | 0.025 mm/yr |
| Cavitation Resistance | 1.2 mg/hr loss | 4.5 mg/hr | 3.8 mg/hr |
| Fatigue Strength | 345 MPa (10⁷ cyc) | 290 MPa | 240 MPa |
| Impact Toughness | 100 J @ -40°C | 60 J | 90 J |
| Max Service Temp | 400°C (750°F) | 260°C | 870°C |
Certifications: AMS 4881C, AS 4861. PED 2014/68/EU, Lloyds Register Type Approval
Top 4 Competitive Advantages
Unmatched Corrosion Resistance
Zero pitting after 5.000hr ASTM B117 salt spray testing
Superior Cavitation/Erosion Resistance
8× better than carbon steel in high-velocity seawater
Non-Galling & Non-Sparking
μ=0.18 friction coefficient (ATEX/IECEx certified)
Lifecycle Cost Savings
40% lower total ownership cost vs. super duplex steels
Critical Performance Features
Biofouling Resistance: 85% less marine growth vs. brass (ISO 22196)
Cryogenic Compatibility: Maintains ductility down to -196°C
Stress-Corrosion Immunity: Passes ASTM G47 at 70% yield strength
Thermal Stability: Consistent performance from -50°C to 400°C
EMI Shielding: 92% RF attenuation (1 MHz–18 GHz)
Precision Manufacturing Process
1 Vacuum Induction Melting
Oxygen-free copper + aerospace-grade alloys under argon shield
2 Investment Casting
Ceramic molds with ±0.1mm dimensional accuracy
3 Hot Isostatic Pressing (HIP)
1100°C @ 100 MPa × 4hr → eliminates microporosity
4 Solution Heat Treatment
790°C × 8hr + water quench
5 Rigorous Quality Control
100% PMI (XRF/OES) + ASTM E186 radiography + hardness testing
Core Applications
| Industry | Critical Components | Standards |
|---|---|---|
| Aerospace | Actuator sleeves, rotor bearings | AMS 4881C, AS 4861 |
| Marine Engineering | Propeller hubs, stern tubes, pump bodies | MIL-S-24112. DNVGL |
| Oil & Gas | Subsea valve trims, Xmas tree components | API 6A, NORSOK M-650 |
| Power Generation | Hydro turbine wear rings, shaft seals | IEC 60034. ASME PTC |
| Chemical Processing | Acid pump impellers, reactor agitators | ISO 5199. ASME B73.1 |
Top Search Keywords:
AMS 4881 distributor | Nickel aluminum bronze casting | Marine propeller alloy | Aircraft bearing bronze
Please Feel free to give your inquiry in the form below. We will reply you in 24 hours.
Products
Phone
