6061 is a heat-treatable alloy with good formability, weldability, machinability, and medium strength. It can still maintain good operability after annealing.
The main alloying elements of 6063 are magnesium and silicon. It has excellent processing properties, excellent weldability, extrudability and electroplating properties, good corrosion resistance, toughness, easy polishing, color film, and excellent anodizing effect, which is typical Of extruded alloys.
The 6063 aluminum alloy profile has many advantages such as good plasticity, moderate heat treatment strength, good welding performance, and gorgeous color on the surface after anodizing.
Comparison of chemical composition of 6061 and 6063:
| Steel number | AL | SI | CU | MG | ZN | MN | TI | CR | FE |
| 6061 | margin | 0.4-0.8 | 0.15-0.4 | 0.8-1.2 | 0.25-0.50 | 0.15-0.50 | 0.15 | 0.04-0.35 | 0.7-,0.13 |
| 6063 | margin | 0.20～0.6 | ≤0.10 | 0.45～0.9 | ≤0.10 | ≤0.10 | ≤0.10 | ≤0.10 | 0.000～ 0.350 |
The main purpose of 6061: It is widely used in various industrial structural parts that require a certain strength and high corrosion resistance, such as the manufacture of trucks, tower buildings, ships, trams, railway vehicles, furniture, etc.
The main purpose of 6063: It is widely used in the frame of building aluminum doors and windows and curtain walls. In order to ensure that the doors, windows and curtain walls have high wind pressure resistance, assembly performance, corrosion resistance and decoration performance, the requirements for the comprehensive performance of aluminum alloy profiles are far higher. Based on industrial profile standards.
In addition, in terms of mechanical properties, the hardness of 6061 is higher than 6063, and the tensile strength of 6061 is correspondingly higher than 6063.
