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National Standards for Base Materials (Blank)
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 鈮?.15 鈮?.20 鈮?.05 0.45-0.90 鈮?.05 鈮?.05 鈮?.15
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