Basics of aluminum and aluminum alloys
1.Standard duralumin
Has medium strength and good spot welding properties. It is prone to cracking when used as a solder for gas welding and arc welding. It can be strengthened by heat treatment. It is used in quenching and natural aging conditions. It is not very corrosion resistant. It is mainly used for packaging aluminum, and the surface protection is anodizing and painting. It has poor machinability in the annealed state and good hardenability.
Used as medium strength parts, air propeller blades, bolts, rivets, etc., and also includes craftsman zero turn 54 parts, cub cadet zero turn mower deck parts, cub cadet zero turn mower parts, encore zero turn mower parts and large-scale precision turned parts.
2.High-strength duralumin
Has good spot welding properties. It has a tendency to crack in sub-arc welding and gas welding. It has acceptable machinability in the annealed state and can be strengthened by heat treatment. Poor corrosion resistance. Aluminum cladding, anodizing and coating are usually used to improve corrosion resistance.
3.Heat-resistant hard aluminum
It has high creep strength at high temperature, and the alloy has high plasticity in hot state; it has good machinability, no extrusion effect, can be strengthened by heat treatment, has good welding performance, can be spot welded, rolled and argon arc welded, but the corrosion stability of the weld is poor, and anodizing treatment should be used
It is used for parts working at high temperature (250~350℃), such as compressor blades, welding parts, etc.