KUPRAL® 4
Nickel-Aluminum Bronze | CuAl10Ni5Fe4
KUPRAL 4 (CuAl10Ni5Fe4), produced by Çorum Bronz, is a nickel-aluminum bronze alloy that offers high strength, superior wear resistance, and excellent durability against seawater. It ensures maximum performance in systems operating under heavy loads and high pressure.
01. Chemical Composition (%)
science02. Industries Served
factory03. Supply Forms
inventory_204. Mechanical Properties
engineering| Property Name | Imperial (psi) | Metric (MPa) | Test Method |
|---|---|---|---|
| Tensile Strength | N/mm² | min. 640 N/mm² | - |
| Yield Strength | N/mm² | min. 270 N/mm² | - |
| Hardness | HB | min. 180 HB | - |
| Density | - | 7,6 g/cm³ | - |
05. Areas of Use
settings_suggest| In critical engine and gearbox (gear) components requiring high strength and wear resistance | |
| Propellers resistant to seawater corrosion | |
| In the manufacturing of heavy-duty bearings, shafts, worm screws, and other gear mechanisms | |
| Screws exposed to heavy loads or corrosive environments |
06. Global Equivalent Grades
public| Region | Standard | Grade Definition | Notes |
|---|---|---|---|
| flag Europe | EN | CuAl10Ni5Fe4-C | Casting |
| flag Europe | EN | CC333G | Casting |
| flag Europe | EN | CW307G | |
| flag USA | ASTM | C6301 | |
| flag Türkiye | Brand Name | KUPRAL 4 | Çorum Bronz |
| flag Global | Trade | Nickel-Aluminum Bronze | Common Name |
07. Technical Resources
folder_open08. Standard Compliance
verified_userLong Notes
note_altKUPRAL 4 (CuAl10Ni5Fe4) High-Performance Nickel Aluminum Bronze
KUPRAL 4, developed through Çorum Bronz’s advanced casting technologies, is a premium nickel aluminum bronze alloy. Thanks to its specialized structure enriched with aluminum, nickel, and iron, it delivers exceptional strength, wear resistance, and corrosion protection.
As one of the most robust alloys in the KUPRAL series, it is specifically designed to ensure long-lasting and reliable performance in systems operating under high pressure, heavy loads, and aggressive environmental conditions.
Alternative Designations & Cross-References
KUPRAL 4 covers a wide range of international standards and trade names, including:
Standards: AB2, AMS 4640, AMS 4880/4881, NFL 14706, MIL 24059
ASTM/CDA: C63000, C63200, C95800, CDA 630
EN/DIN: CC333G, CC334G, CW308G, 2.0980, 2.0978, 2.0966
Common Aliases: UA11N, CuAl10Ni5Fe4, CuAl11Ni5Fe5
Superior Material Properties
Produced with Çorum Bronz’s commitment to excellence, KUPRAL 4 offers:
High Strength & Hardness: Maintains structural integrity under extreme stress.
Wear Resistance: Strong protection against surface deformation and friction.
Marine Excellence: Outstanding resistance to seawater corrosion and biofouling.
Dynamic Durability: Highly resistant to cavitation and erosion.
Thermal Stability: Retains mechanical properties under high temperatures and pressures.
Technical Structure and Mechanical Performance
Tensile Strength: 640 MPa
Yield Strength: 270 MPa
Hardness: 180 HB
Density: ~7.5
Global Equivalent Grades
EN Standard: CuAl10Ni5Fe4
DIN Standard: 2.0966
ASTM Standard: C63000
Common Applications
KUPRAL 4 is preferred for mission-critical components:
Heavy-Duty Bearings: Bushings and bearing systems under high loads.
Power Transmission: Gears, shafts, and worm screw mechanisms.
Fluid Control: Pump and valve components for corrosive media.
Marine Engineering: Ship propellers and offshore equipment.
Aerospace & Defense: High-stress structural parts and landing gear components.
Sectoral Applications
Marine & Offshore
Defense & Aerospace
Energy & Turbine Systems
Oil & Gas
Heavy Industry
Availability & Supply
Çorum Bronz supplies KUPRAL 4 in various high-quality forms:
Bronze Rods (Round and Hexagonal)
Bronze Flat Bars (Lama)
Bronze Plates / Sheets
Why Choose Çorum Bronz KUPRAL 4? Çorum Bronz is a sector leader in nickel aluminum bronze production, combining high-capacity manufacturing with rigorous engineering standards. KUPRAL 4 is more than just an alloy; it is a professional engineering solution offering premium durability, extended service life, and competitive pricing.