Non-ferrous Metal Materials
Aluminum
Characteristics: Low specific gravity (2.7 g/cm³, approximately 35% of iron). High electrical and thermal conductivity. Easily corroded by seawater, acid, and alkali. Forms a thin oxide film in air or water, which prevents corrosion.
It has excellent castability and workability, allowing for rolling, wire drawing, and pressing at both room temperature and high temperatures.
- Aluminum Alloys
- Al-Cu Alloy (A2017):
- Uses: General-purpose high-strength material, such as aircraft materials, various structural materials, and machine parts.
- Features: Known as “Duralumin”. It is a heat-treatable alloy with high strength and good machinability, but poor weldability.
- Al-Mg Alloy (A5052):
- Uses: General-purpose high-strength material, such as ships, vehicles, building materials, beverage cans, and machine parts.
- Features: A representative alloy with medium strength. It has good corrosion resistance, press formability, weldability, and seawater resistance.
- Al-Mg-Si Alloy (A6061):
- Uses: General machine parts.
- Features: A heat-treatable, corrosion-resistant alloy. After T6 treatment, it achieves considerably high yield strength.
- Al-Mg-Si Alloy (A6063):
- Uses: Structural materials for general machine parts, such as parts or flat plates that do not require high strength.
- Features: Often used for extruded materials. Its strength is lower than A6061, but it has excellent extrudability, allowing for complex cross-sectional shapes. It has good corrosion resistance and surface treatability.