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The Difference Between Aluminum 6061, 6063 And 6005

The Difference Between Aluminum 6061, 6063 And 6005

AL6061, AL6063 and AL6005 are collectively referred to as 6××× series aluminum alloys. AL6061, AL6063 and AL6005 are commonly used aluminum alloy material grades. The less commonly used 6××× series aluminum alloys are 6009, 6010, 6061, 6063, 6066, 6070 , 6101, 6151, 6201, 6205, 6262, 6351, 6463, 6A02.

This pile of numbers looks a bit dazzling, it doesn’t matter, there are still a bunch of chemical symbols below.

Chemical composition of AL6061: Its main chemical composition is (mass fraction of each element):

  • Copper Cu: 0.15~0.4
  • Manganese Mn:0.15
  • Magnesium Mg: 0.8~1.2
  • Zinc Zn: 0.25
  • Chromium Cr: 0.04~0.35
  • Titanium Ti: 0.15
  • Silicon Si: 0.4~0.8
  • Iron Fe: 0.7
  • Aluminum Al : Allowance

AL6061 corresponding grade:

  • National standard: 6061 (LD30) GB/T 3190-2008
  • ISO: AlMg1SiCu ISO 209.1-1989
  • Japanese standard: A6061 JIS H4000-1999 JIS H4040-1999
  • Non-standard: 65032 IS 733-2001 IS 737-2001
  • EN: EN AW-6061/AlMg1SiCu EN 573-3-1994
  • German standard: AlMgSi1Cu/3.3211 DIN 1725.1-1986/W-Nr
  • French standard: 6061 (A-GSUC) NF A50-411 NF A50-451
  • British Standard: 6061 (N20/H20) BS 1470-1988
  • American Standard: 6061/A96061 AA/UNS

The main alloying elements in 6061 aluminum alloy are magnesium and silicon. 6061 aluminum alloy is a high-quality aluminum alloy product produced by heat treatment and pre-stretching process. Although its strength cannot be compared with 2XXX series or 7XXX series, its magnesium and silicon alloys. There are many characteristics, with excellent processing performance, excellent welding characteristics and electroplating, good corrosion resistance, high toughness and no deformation after processing, dense material without defects and easy to polish, easy to color film, excellent oxidation effect, etc. Features.

Generally used for structural materials with load-bearing requirements or industrial aluminum profiles with welding requirements, usually in T6 state or T651 state. The material of 6061 in special-shaped extruded aluminum profiles is usually used for extruded aluminum parts with uncomplicated cross-sections.

Chemical composition of AL6063: Its main chemical composition is (mass fraction of each element):

  • Aluminum Al : Allowance
  • Silicon Si: 0.20 to 0.6
  • Copper Cu: ≤0.10
  • Magnesium Mg: 0.45~0.9
  • Zinc Zn: ≤0.10
  • Manganese Mn: ≤0.10
  • Titanium Ti: ≤0.10
  • Chromium Cr: ≤0.10
  • Iron Fe: 0.000 to 0.350
  • Note: single: ≤0.05; total: ≤0.15

6063 is a low alloyed Al-Mg-Si series high plasticity alloy. It has many valuable features: 1. Strengthened by heat treatment, high impact toughness, and insensitive to notch. 2. It has good thermoplasticity and can be extruded at high speed into various profiles with complex structure, thin wall and hollow, or forged into forgings with complex structure. The quenching temperature range is wide and the quenching sensitivity is low. After extrusion and forging demoulding, as long as the temperature is higher than the quenching temperature, it can be quenched by water spray or water penetration. Thin-walled parts (δ<3mm) can also be air quenched. 3. Excellent welding performance and corrosion resistance, no stress corrosion cracking tendency. Among the heat-treatable-strengthened aluminum alloys, Al-Mg-Si alloys are the only alloys that have not found stress corrosion cracking. 4. The surface after processing is very smooth and easy to anodize and color. The disadvantage is that after quenching, if it is parked at room temperature for a period of time, the aging will have an adverse effect on the strength (parking effect).

Within the composition range of 6063 aluminum alloy specified in the national standard GB/T3190, different values ​​of chemical composition will result in different material properties. When the range of chemical composition is large, the performance difference will fluctuate within a large range. , so that the overall performance of the profile will be uncontrollable.

AL6005 extruded profiles and pipes are used for structural parts that require higher strength than 6063 alloy, such as ladders and TV antennas. Wait. The strength is between 6061 and 6063, and can do T5 and T6 states. It is also a commonly used material for extruded aluminum profiles. Some complex cross-section profiles cannot be achieved by 6061, but they have requirements for hardness, and are usually replaced by 6005T6 materials. At present, the most used solar frame is the solar frame, and the good solar frame is extruded with 6005 material.

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