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Standard
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No., Status 6063 T5
Standard No. GB5237.1-2008
Appearance quality
  1. The profile surface shall be tidy and has no defects such as cracking, peeling, corrosion and bubbles.
  2. Slight pressure hole, bruise or scratches in the profile surface, the allowable depth in the decoration surface shall be no more than 0.07mm, and that in non-decoration surface shall be no more than 0.10mm. The depth of the impress shall be not more than 0.03mm.
  3. Partial strains arising from cutting are allowed in the end heads of the profiles, but the vertical length shall not exceed 10mm.
Allowable size deviation
Gap Bending Distortion Angle Length
≤0.15mm for any width of 25mm ≤0.3mm for any length of 300mm ≤1.20mm for each one meter of length ±1.0° Nominal lenght≤6m±15mm
Mechanical property
Wechsler Hardness(HW) Tensile strength Yield strength Tensile stretch
≥8 ≥160N/mm2 ≥110N/mm2 8%
Chemical composition
Si Fe Cu Mn Mg Zn Other impurities
Single Total
0.2-0.6 ≤0.15 ≤0.20 ≤0.05 0.45-0.90 ≤0.05 ≤0.05 ≤0.15
No., Status 6063 T5
Standard No. GB5237.2-2008
Quality To comply with requirements of GB5237.1-2008
Allowable size deviation To comply with requirements of GB5237.1-2008
Mechanical property To comply with requirements of GB5237.1-2008
Chemical composition To comply with requirements of GB5237.1-2008
Quality of oxide film
Grade Average thickness Min partial thickness CASS test Shakeout test Abrasion coefficient Hole seal
AA10 ≥10μm ≥8μm ≥grade 9 ≥300g/μm ≤30mg/dm2
AA15 ≥15μm ≥12μm ≥grade 9 ≥300g/μm
Appearance quality No defects that affect use, such as burned spots, sheds of oxide films are allowed on the surface. No film or electric burns are allowed within 80 mm range from the end heads of the profiles.
No., Status 6063 T5
Standard No. GB5237.2-2008
Quality To comply with requirements of GB5237.1-2008
Allowable size deviation To comply with requirements of GB5237.1-2008
Mechanical property To comply with requirements of GB5237.1-2008
Chemical composition To comply with requirements of GB5237.1-2008
Quality of compound film
Grade Thickness of oxide film Thickness of paint film Thickness of compound film
A ≥9μm ≥12μm ≥21μm
B ≥9μm ≥7μm ≥16μm
Appearance quality The appearance quality before spraying shall comply with relevant requirements of B 5237.2. The paint film after spraying shall be even and tidy, not allowing for defects that may affect use such as wrinkles, cracks, bubbles, stream traces, pastiness and shreds of paint films. It is allowed to have no film within 80mm from the end heads of the profiles.
No., Status 6063 T5
Standard No. GB5237.4-2008
Quality To comply with requirements of GB5237.1-2008
Allowable size deviation To comply with requirements of GB5237.1-2008
Mechanical property To comply with requirements of GB5237.1-2008 after the coating is removed.
Chemical composition To comply with requirements of GB5237.1-2008 after the coating is removed.
Requirements

Color and aberration
The color of the coating shall be basicallythe same as agreed by both the supplier and the buyer. When tested withcolorimeter, the aberration between the single color coating and sample △Eab·≤1.5, and the aberration for the same (delivery)lot of profiles △Eab·≤1.5

Coating thickness
Min partial thicknessof the decoration surface≥40μm

Indentation harness
Indentationresistance of coating ≥80

Adhesive quality
The dry, wet and boiling adhesive quality of the coating shall reach level 0.

Impact resistance
The coating shall have no cracking or shreds after impact tests.
When the supplier and the buyer are negotiating to use coatings with special features but bad impact resistance, the coating is allowed to have slight cracks after impact tests, however, the surface of the coating shall have no shreds or adhesion when it is further tested with adhesive tapes.

Cup drawing resistance
The coating shall have no cracking or shreds after cup drawing tests.
When the supplier and the buyer are negotiating to use coatings with special features but bad cup drawing resistance, the coating is allowed to have slight cracks after impact tests, however, the surface of the coating shall have no shreds or adhesion when it is further tested with adhesive tapes.

Bending resistance
The coating shall have no cracking or shreds after bending tests.
When the supplier and the buyer are negotiating to use coatings with special features but bad bending resistance, the coating is allowed to have slight cracks after impact tests, however, the surface of the coating shall have no shreds or adhesion when it is further tested with adhesive tapes.

Appearance quality
The coating on the decoration surface of the powder spraying profiles shall be smooth, even and have no defects that may affect use such wrinkles, cracks, bubbles, stream traces, pastiness and shreds of paint films. It is allowed to have slight peeling, the extent of which shall be subject to the surface of sample agreed by the supplier and the buyer.
No., Status 6063 T5
Standard No. GB5237.4-2008
Quality To comply with requirements of GB5237.1-2008
Allowable size deviation To comply with requirements of GB5237.1-2008
Mechanical property To comply with the requirements of GB5237.1-2008 after the coating is removed.
Chemical composition To comply with the requirements of GB5237.1-2008 after the coating is removed.
Requirements

Coating gloss
The value of 60°gloss of the coating shall be comply with the contract with a deviation of ±5units.

Coating thickness

Types of coating Average thickness Partial thickness of compound film
2 coatings Average≥30μm Min thickness ≥25μm
3 coatings Average≥40μm Min thickness≥34μm
4 coatings Average≥65μm Min thickness≥55μm

Coating hardness
Tested by pencilstrokes, hardness≥1H.

Adhesion
The dry, wet andboiling adhesion of the coating shall reach level 0.

Impact resistance
After impact test,slight cracks are allowed on the coatings, but it is not allowed to have shredson the adhesive tapes.

Salt and acid resistance
After acid and saltresistance test, the surface of the coating after visual inspection shall haveno bubbles or other obvious changes.

Solvent resistance
After solventresistance test, the coating shall not be softened or have other obviouschanges.
No. Chemical Component (%)
Si Fe Cu Mn Mg Cr Zn Ti Other Al
Single Total
6063 0.20～0.6 0.35 0.1 0.1 0.45～0.9 0.1 0.1 0.1 0.05 0.15 Residue
6061 0.40～0.8 0.7 0.15～0.40 0.15 0.8～1.2 0.04～0.35 0.25 0.15 0.05 0.15 Residue
6005 0.6～0.9 0.35 0.1 0.1 0.40～0.6 0.1 0.1 0.1 0.05 0.15 Residue
6005A 0.50～0.9 0.35 0.3 0.5 0.40～0.7 0.3 0.2 0.1 0.05 0.15 Residue
6351 0.7～1.3 0.5 0.1 0.40～0.8 0.40～0.8 — 0.2 0.2 0.05 0.15 Residue
6463 0.2～0.6 0.15 0.2 0.05 0.45～0.9 — 0.05 — 0.05 0.15 Residue
6082 0.7～1.3 0.5 0.1 0.40～1.0 0.6～1.2 0.25 0.2 0.1 0.05 0.15 Residue

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