めっき技術

Aluminum-based materials

Aluminum alloys are lightweight (specific gravity 2.7, which is 1/3 of iron), and their strength is improved to 600MPa (60kgf/mm2) by alloying. Having good workability, corrosion resistance, thermal conductivity, and light reflectivity, they are frequently used for aircraft, automobiles, and other transportation equipment, architectural members, heat exchangers, and chemical industry members. Furthermore, with the electrical conductivity 60% or more of copper, they are suitable as electrical materials. However, since aluminum alloys themselves also have shortcomings, such as being easily scratched and being low in wear resistance, hard electroless nickel plating is performed to make up for the shortcomings.
Classification Type Features Uses
Non-heat treated type (1) Pure Al-based
Six types from A1050P to A1200P
A1050(99.5%Al),A110(99%Al)

(2) Al-Mn-based
Six types from A3003P to A3105P
A3003(Al-1.2Mn)

(3) Al-Mg系   
Ten types from A5005P to P5086P
A5056(Al-5Mg), A5086(Al-4Mg)
- Strength 80MPa (8kgf/mm2)

- Strength 110MPa (11kgf/mm2)

- Strength 200MPa (20kgf/mm2)
- Impact cases, heatsinks

- Aluminum cans, kitchen instruments, panels, piping materials

- Camera parts, copiers, structural materials, magnetic disks
Heat-treated type (1) Al-Cu-based alloy materials
Six types from A2004P to A2024P
A2024(Al-4.5Cu-1.5Mg)

(2) Al-Mg-Si-based
A6061(Al-1Mg-0.6Si)

(3) Al-Zn-Mg-based
A7000-based
A7075(Al-5.6Zn-2.5Mg-1.6Cu)
A7N01(Al-4.5Zn-1.5Mg)
- Duralumin, super duralumin (quench and temper T6 treatment)

- Age hardening treatment, corrosion resistance, strength

- Extra super duralumin, high strength
- Aircraft, transportation equipment, machine parts

- Sashes, motorcycle parts, sports gear

- Aircraft structural members, Shinkansen, train cars, sports gear
採用事例
Aluminum-based materials
Aluminum-made Shinkansen “Nozomi”