|
CHEMICAL
COMPOSITION
|
Designation:LD30(6061
|
|
Si
|
Fe
|
Cu
|
Mn
|
Mg
|
Cr
|
Zn
|
Ti
|
Others
|
Al
|
|
Single
|
Total
|
|
0.4-0.8
|
0.7
|
0.15-0.40
|
0.15
|
0.8-1.2
|
0.04-0.35
|
0.25
|
0.15
|
0.05
|
0.15
|
Surplus
|
|
|
CHENICAL COMPOSITION
|
Designation:LD31(6063
|
|
Si
|
Fe
|
Cu
|
Mn
|
Mg
|
Cr
|
Zn
|
Ti
|
Others
|
Al
|
|
Single
|
Total
|
|
0.2-0.6
|
0.35
|
0.10
|
0.1
|
0.45-0.90
|
0.1
|
0.1
|
0.1
|
0.05
|
0.15
|
Surplus
|
|
|
MECHANICAL PROPERTY
|
|
|
Alloy
designations
|
Condition
|
Tensile
strength
|
Yield
strength
|
Elongation
rate
|
Vickers
hardness
|
|
LD30(6061)
|
CS(T6)
|
≥265N/mm²
|
≥245N/mm²
|
≥8%
|
|
|
LD31(6063)
|
RCS(T5)
|
≥160N/mm²
|
≥110N/mm²
|
≥8%
|
HV≥58
|
|
CS(T6)
|
≥205N/mm²
|
≥180N/mm²
|
≥8%
|
|
|
|
Thickness
of oxide film: above 10um, above 15um when use in glass curtain wall
|
|
|
HOLE SEALING QUALITY OF OXIDE FILM
|
|
|
Testing method
|
P-Cr acid-etching weigh loss method
|
After-acid-dipping weith loss method
|
|
Acceptable
|
≤30mg/dm²
|
≤20mg/dm²
|
|
|
QUALITY
OF ELECTROPHORETIC PAINTING.
|
Hardness
of pain film:≥3H
Thickness of pain film:
|
|
Grade
|
Anodic
oxide film
|
Pain
film
|
Complex
film
|
|
Average
thickness of film
|
Local
thickness
|
|
A
|
≥10
|
≥8
|
≥12
|
≥21
|
|
B
|
≥10
|
≥8
|
≥7
|
≥17
|
|
|
The positive pole oxidizes the colouring type material
|
|
Rank
|
It is thick to oxidize the membrane
|
Oxidize the membrane and seal hole quality
|
|
Average membrane degree
|
Some thickness
|
The phosphorus chromium acid soaks the method of loss
of weight
|
|
AA10
|
≥10um
|
≥8um
|
≤30mg/dm2
|
|
AA15
|
≥15um
|
≥12um
|
|
