1. Material

No.

Classificaiton

Layer

Alloy Number

Cladding Ratio

1.1

Non-cladding

Core

AA3003

-

1.2

Cladding

Outer cladding

AA4343

8%-12%

Core

AA3003

-

Inner cladding

AA4343/7072

8%-12%

2. Product size and tolerance

No.

Specification

Size

Tolerance

2.1

Width (mm)

15 to 50

within ±0.08

2.2

Height (mm)

1.5 to 5

±0.06

2.3

Wall Thickness (mm)

0.25 to 0.5

±0.015

3. Chemical composition for alloys

No.

AA number

Chemical Composition (%)

Si

Fe

Cu

Mn

Mg

Zn

Ti

Zr

Bi

Others

Al

Each

Total

3.1

3003

0.6

0.7

0.05-0.2

1-1.5

0.05

0.1

0.05

0.15

RE

3.2

4343

6.8-8.2

0.8

0.25

0.1

0.05

0.2

0.05

0.15

RE

3.2

7072

0.7

0.1

0.1

0.1

0.1

0.8-1.3

0.05

0.15

RE

4. Mechanical properties

No.

Alloy number

Temper

Yield Strength
Rp0.2(Mpa).
Min

Tensile Strength
Rm (Mpa)

Elongation
(%)
A50,Min

Typical usage

4.1

3003

O

35

95-135

10

Auto. Heat exchanger welded tube

4.2

3003

H12

90

120-175

0.5

Auto. Heat exchanger welded tube

4.3

3003

H14

125

145-200

0.5

Auto. Heat exchanger welded tube

4.4

3003

H24

125

145-205

6

Auto. Heat exchanger welded tube

4.5

4343

O

35

95-150

8

Auto. Heat exchanger welded tube

4.6

4343

H14

120

140-200

0.5

Auto. Heat exchanger welded tube

5. Surface finish and other properties

No.

Item

Description

5.1

Surface finish

a. shall be free from pinholes and tearing; b. shall be free from waves and buckles; c. shall be bright,clear from dirts

5.2

Depth of Curvature

In any length of 1 meter of the material,the depth of arc shall not exceed 2mm

5.3

Twist

In any length of 1 meter of the material,the depth of arc shall not exceed 1mm

5.4

Flatness

In any length of 1 meter of the material,the depth of arc shall not exceed 2mm

5.5

Pressure tightness

Over 3.7 Mpa

6. Packing,Shipping and others

No.

Item

Description

6.1

Packing

To be packed in wooden crate with polythene cover for water protection

6.2

Marking

Each box to be legibly marked with the name of the manufacturer or supplier, the alloy designation of material,condition,dimensions and weight

6.3

Shipping tools

Ship goods by van to departune port then by sea to desitination port

6.4

Quantity variation

±10% variation with order quantity shall be acceptable

7.Quality management and spot management

No.

Item

Description

7.1

Quality control

1. Quality assurance
a. Incoming material quality assurance; b. Process quality assurance; c. First sample quality assurance; d. Final quality assurance.
2. Process management-The right results are from the right process
a. Production process card control; b. Standard operational procedure;c.Job certification;d. Quality chart monitor.
3. Equipment and facility management
a. Periodic maintenance; b.Preventative maintenance.
4. Mold management
a. Mold life management; b.Periodic and preventative maintenance; c. Periodic inspection.

7.2

Inspection Tools

Altimeter,Vernier caliper,Micrometer,3D coordinate measuring instrument

7.3

Spot management

"5S" management (sort,set in order,shine,standard,sustainable).