28
Cu
Copper
%76,0–83,0
CuAl10Fe5Ni5
CuAl10Fe5Ni5 | KUPRAL® 5 | Nickel Aluminium Bronze
KUPRAL® 5 (CuAl10Fe5Ni5-C / CC333G) is a cast nickel aluminium bronze combining high mechanical strength with wear, cavitation and seawater corrosion resistance. It is considered for pumps, valves, propellers, heavy-duty bushes, bearings and gear components.
- Alloy
- CuAl10Fe5Ni5
- EN casting
- CC333G
- EN ingot
- CB333G
- Former DIN
- CuAl10Ni / 2.0975
- Comparable UNS
- C95800
- Density
- 7.60 g/cm³
01. Chemical Composition (%)
13
Al
Aluminium
%8,5–10,5
26
Fe
Iron
%4,0–5,5
28
Ni
Nickel
%4,0–6,0
25
Mn
Manganese
%3,0 Max
30
Zn
Zinc
%0,50 Max
14
Si
Silicon
%0,10 Max
50
Sn
Tin
%0,10 Max
12
Mg
Magnezyum
%0,05 Max
24
Cr
Chromium
%0,05 Max
82
Pb
Lead
%0,03 Max
83
Bi
Bizmut
%0,01 Max
02. Mechanical Properties
| Property | Unit | Value | Test Method |
|---|---|---|---|
| Tensile Strength Rm | MPa | GS ≥600; GM ≥650; GZ ≥650; GC ≥650 | EN 1982; minimum by casting process |
| 0.2% Proof Strength Rp0.2 | MPa | GS ≥250; GM ≥280; GZ ≥280; GC ≥280 | EN 1982; minimum by casting process |
| Elongation A | % | GS ≥13; GM ≥7; GZ ≥13; GC ≥13 | EN 1982; minimum by casting process |
| Hardness | HBW | GS ≥140; GM ≥150; GZ ≥150; GC ≥150 | EN 1982; minimum by casting process |
| Density | g/cm³ | approximately 7.6 | Typical value; not a standard acceptance value |
03. Applications
- Ship propellers and marine equipment
- Seawater pumps and pump impellers
- Valve and control-valve bodies
- Heavy-duty bushes and plain bearings
- Worm wheels and highly loaded gears
- Shaft and drive-system components
- Heat-exchanger and piping components
- Chemical and process equipment
- Flow components exposed to cavitation and erosion
- Machine parts under high static and dynamic loads
04. Manufacturing Technology and Supply Forms
Manufacturing TechnologyCuAl10Fe5Ni5-C / CC333G may be produced by sand (GS), permanent-mould (GM), centrifugal (GZ) and continuous (GC) casting. The process is selected according to component geometry, dimensions, surface requirements, mechanical requirements and service environment.
Supply FormsHollow Bar / Pipe, Flat Bar / Plate, Round Bar
05. Standards and Comparable Grades
06. Technical Description
View Detailed Technical Description
What Is CuAl10Fe5Ni5?
CuAl10Fe5Ni5 is a high-strength nickel aluminium bronze designated CuAl10Fe5Ni5-C / CC333G for castings under EN 1982. It is supplied by Çorum Bronz under the trade name KUPRAL® 5. The alloy is considered for demanding applications requiring strength, wear and fatigue performance, cavitation resistance and seawater corrosion resistance.
CuAl10Fe5Ni5 Chemical Composition
For CC333G castings, Cu is 76.0-83.0%, Al 8.5-10.5%, Fe 4.0-5.5% and Ni 4.0-6.0%. Maximum limits are Mn 3.0%, Zn 0.50%, Si 0.10%, Sn 0.10%, Mg 0.05%, Cr 0.05%, Pb 0.03% and Bi 0.01%. Process-specific limits for permanent-mould castings allow minimum Fe of 3.0% and minimum Ni of 3.7%.
The composition limits of the related CuAl10Fe5Ni5-B / CB333G ingot grade differ from those of the casting grade. CC333G and CB333G analyses are therefore evaluated against their respective specifications.
Mechanical Properties by Casting Process
According to EN 1982 minimums, sand castings require Rm 600 MPa, Rp0.2 250 MPa, elongation 13% and hardness 140 HBW. Permanent-mould castings require 650 MPa, 280 MPa, 7% and 150 HBW; centrifugal and continuous castings require 650 MPa, 280 MPa, 13% and 150 HBW.
The continuous-casting minimums apply to sizes up to 300 mm and are guidance values for larger sections. Final component properties can vary with section, geometry, casting structure and test-sample location.
Typical Physical Properties
Typical reference values include density of approximately 7.6 g/cm³, elastic modulus of about 120 GPa, thermal expansion of about 16 × 10⁻⁶/K and thermal conductivity of roughly 60 W/(m·K). These are engineering references rather than EN 1982 acceptance values.
Technical Characteristics and Material Selection
The protective aluminium-rich oxide film supports corrosion performance in seawater and various industrial environments. Nickel and iron contribute to strength, microstructural stability, fatigue, wear, erosion and cavitation resistance.
Plain-bearing and bush applications require suitable lubrication and assessment of shaft hardness, surface finish, running clearance, pressure and sliding speed. Seawater systems also require consideration of flow velocity, temperature, galvanic contact, water chemistry and cavitation risk.
CuAl10Fe5Ni5 Applications
Typical applications include ship propellers, seawater pumps and impellers, valve bodies, heavy-duty bushes and plain bearings, worm wheels and gears, shaft and drive-system components, heat-exchanger and piping components, chemical and process equipment, and machine components exposed to high static and dynamic loads.
Production Technology and Product Forms
CuAl10Fe5Ni5-C / CC333G can be produced by sand, permanent-mould, centrifugal and continuous casting. It may be supplied as hollow bar, round bar, bushes, rings, special sections, cast components or machined parts manufactured to drawing.
CuAl10Ni5Fe4 / CW307G, encountered in plate, flat and wrought semi-finished products, is a separate wrought alloy. CW307G and CC333G are not automatically interchangeable because their product standards, manufacturing structures and chemical limits differ.
CuAl10Fe5Ni5 Supply from Çorum Bronz
Çorum Bronz supplies KUPRAL® 5 CuAl10Fe5Ni5 as semi-finished material or machined components to project requirements. Dimensions, sections, tolerances, casting process, surface machining, testing and EN 10204 certification requirements are evaluated at the ordering stage.
Standards and Comparable Grades
The principal European designation is CuAl10Fe5Ni5-C / CC333G; the related ingot designation is CuAl10Fe5Ni5-B / CB333G. The former DIN 1714 designation is CuAl10Ni / 2.0975, while BS 1400 AB2 is the nearest former British grade. UNS C95800, C95820 and C95500 are comparable US alloys, but they are not exact equivalents because their composition and product requirements differ.
ASTM B148 covers sand-cast aluminium bronze products, ASTM B271/B271M centrifugal castings and ASTM B505/B505M continuous-cast products. ISO 4382-1:2021 covers cast copper alloys for plain-bearing applications. ISO 1338:1977 is a historical withdrawn cast-copper-alloy standard.
Engineering and Quality Note
Final conformity is verified through the applicable standard, casting process, section size, chemical analysis, mechanical testing, non-destructive examination requirements and EN 10204 inspection documentation. Marine, pressure-equipment and safety-critical applications may also require project, classification-society or customer acceptance criteria.