Aluminum Bronze Alloy – Aluminium Bronze Material

Aluminum bronze stands out as a distinctive type of bronze alloy, characterized by the addition of aluminum as the primary alloying metal alongside copper. Unlike traditional bronze, which relies on a blend of copper and tin, or brass, which merges copper with zinc, aluminum bronze typically encompasses 5% to 11% aluminum by weight, with the remaining composition being predominantly copper. Additionally, supplementary elements like iron, nickel, manganese, and silicon may be incorporated to further enhance its properties.

Notably, they demonstrate exceptional resistance to corrosion in marine environments, can endure high temperatures without oxidizing, and display minimal reactivity to sulfurous compounds and other combustion byproducts. The inclusion of aluminum prompts the formation of a protective layer of alumina on the surface, mitigating further corrosion of the copper-rich alloy. Moreover, the introduction of elements such as tin can augment their corrosion resistance.

To produce aluminum bronze, melt copper and aluminum together, adding optional elements like iron, nickel, manganese, and silicon for desired properties. Here’s a summary:

1. Raw Material Selection: Choose high-quality copper and aluminum, typically with aluminum content between 5% to 11%, and add other elements as needed.
2. Melting: Heat the metals in a crucible until they melt. Copper melts at about 1085°C (1985°F) and aluminum at about 660°C (1220°F).
3. Alloying: Mix the molten metals to form the alloy, ensuring uniform composition by stirring.
4. Casting: Pour the molten alloy into molds using methods like sand casting, centrifugal casting, or continuous casting.
5. Cooling and Removal: Let the metal cool and solidify, then remove it from the mold.
6. Finishing: Further process the casting if needed, such as machining, grinding, or polishing, to achieve desired dimensions and surface finish.

Aluminum bronze grades are classified based on their composition, which typically includes copper and aluminum, along with additional elements like iron, nickel, manganese, and silicon to enhance properties. Here’s a summary:

• Common Aluminum Bronze Grades: CuAl5 (CA104, CW307G, BS2 B23, DTD197A): 4% to 6.5% aluminum, 0.5% iron, 0.8% nickel, 0.5% manganese, and 0.5% zinc. Known for wear resistance, shock loading capacity, and mechanical properties at cryogenic temperatures.
  CuAl8: 7% to 9% aluminum, 0.5% iron, 0.8% nickel, 0.5% manganese, and 0.5% zinc.
  CuAl8Fe3: 1.5% to 3.5% aluminum, 1% iron, 1% nickel, 0.8% manganese, and 0.5% zinc.
  CuAl9Mn2: 8% to 10% aluminum, 1.5% iron, 0.8% nickel, 1.5% to 3% manganese, and 0.5% zinc.
  CuAl10Fe3: 2% to 4% aluminum, 2% to 4% iron, 1% nickel, 2% manganese, and 0.5% zinc.
  CuAl10Fe5Ni5: 2% to 6% aluminum, 2% to 6% iron, 4% to 6% nickel, 2% manganese, and 0.5% zinc.
• Specialized Grades: C95400, C95500, C95900: High-strength aluminum bronze alloys by Concast, with C959 being tougher than C954. Known for strength and high wear resistance.
  Nickel Aluminum Bronze (ASTM B505): Excellent wear and galling resistance, high strength, and superior corrosion resistance, widely used in marine applications and bearings.

C95400 Aluminum Bronze is also known as nickel-aluminum bronze because of the Ni content in its composition.

C95400 – The Most Popular Aluminium Bronze Alloy

C954 provides high tensile and yield strength, good ductility, weldability, and machinability, which also has excellent wear resistance, resistance to impact, and fatigue deformation under heavy loads. It is ranked among the strongest and best acid-reducing alloys with good machine and weldability.

C95800 nickel aluminum bronze gate valve is widely used in marine engineering, environmental protection engineering, and oxidizing medium corrosion.

Chemical Composition Of Nickel-Aluminium Bronze

The main chemical composition of nickel-aluminum bronze: copper Cu; the rest of lead Pb: ≤ 0.02 (impurities), nickel Ni: 4.0 ~ 5.0, aluminum Al: 8.5 ~ 10.0, iron Fe: 4.0 ~ 5.0, manganese Mn: 0.8 ~ 2.5, silicon Si: ≤ 0.15 (impurities), carbon C (impurities) ≤ 1.0.

C63200 Aluminum Bronze Bushing has high mechanical properties, excellent corrosion resistance in atmosphere, freshwater, and seawater, good castability & wear resistance, heat resistance up to 400°C, heat treatable, and good weldability.

Chemical Composition

Cu+Ag: 88.2~92.2
Pb：≤0.02
Fe：3.0~5.0
Al：8.5~9.5
Mn：≤3.5
Si：≤0.10
Nickel(With Cobalt) Ni(With Co): 4.0~5.5

• C95200 is a highly ductile material with good corrosion resistance. This is ideally suited for bushings, bearings, light-duty gears, wear plates, low-pressure piping, pump columns, and containers.
• C95500 is one of the toughest of the non-ferrous alloys. It serves the same industries as C95400 with higher strength, hardness, and corrosion resistance, though it has a slightly lower impact toughness.
• As a special Nickel Aluminum Bronze, C95800 is especially suited for marine applications with optimum resistance to seawater corrosion. Those may include propeller system parts, bushings, bearings, piping, including desalination, and other corrosive marine applications.
• C95900 provides higher hardness and compressive strength, and is used for wear plates, forming rolls, draw dies, gears, valve guides, seats, and die inserts.

CC333G / CUAL10FE5NI5 aluminum bronze bushing Combining the robust qualities of aluminum and copper, this continuous cast aluminum bronze stands out as a reliable choice for heavy-load scenarios and environments where traditional tin or leaded bronzes fall short.

• The Strength of Aluminum Bronze alloy: A Perfect Fit for Heavy Loads
• Corrosion Resistance: A Marine Industry Favorite
• While CC333G / CUAL10FE5NI5 aluminum bronze boasts impressive qualities, it’s important to note that the absence of zinc and lead in this material places a strong emphasis on lubrication.
• Continuous Casting: The Manufacturing Advantage

From marine environments to heavy machinery, this aluminum bronze variant continues to prove its mettle. As long as proper lubrication practices are followed, the CC333G / CUAL10FE5NI5 aluminum bronze bushing offers a durable solution that can withstand the test of time and demanding conditions.

CuAl10Ni aluminum bronze bushings epitomize the synergy of strength, hardness, wear resistance, and corrosion resistance. From the demanding world of shipbuilding to heavily loaded machinery, these bushings offer a solution that withstands the toughest challenges. As industries continue to push the boundaries of engineering, the CuAl10Ni aluminum bronze bushing stands as a testament to the incredible achievements that can be unlocked through the fusion of science, metallurgy, and innovation.

The mechanical properties of CuAl10Ni aluminium bronze, as defined by DIN 1705, 1709, and 1714 standards, are equally impressive:

RM (Tensile Strength): 700 MPa
RP02 (Yield Strength): 300 MPa
A (Elongation): 13%
HB (Hardness): 160