GB/T 32468-2015Copper clad aluminum plate, sheets and strips (English PDF)

3.1 Copper clad aluminum plate, sheets and strips

USE aluminum and aluminum alloys as base metal. Continuously COMPOUND

a certain thickness of composites for copper and copper alloy plates, sheets

and strips on one side or both sides, by using continuous casting and semi-

molten rolling composite method or other methods. The composite interfaces

are in metallurgical bond.

3.2 Metallurgical bond

It refers to the bond formed by the inter-diffusion of atoms between the

interfaces of two kinds of metal.

3.3 Cladding copper metal

It refers to the copper and copper alloys playing a variety of functional roles in

the copper clad aluminum plate, sheets and strips.

3.4 Base aluminum metal

It refers to the aluminum and aluminum alloys playing the auxiliary role in the

copper clad aluminum plate, sheets and strips.

3.5 Continuous casting and semi-molten rolling composite method

4.8.1 PLACE the copper clad aluminum plate, sheets and strips in an

environment with a temperature of 85°C and a relative humidity of 85% for

1,000h. The peel strength of copper and aluminum shall conform to the

provisions of Section 4.6.

4.8.2 CYCLE the copper clad aluminum plate, sheets and strips within the

temperature range of -50°C to 130°C for 1,000 times. The peel strength of

copper and aluminum shall conform to the provisions of Section 4.6.

4.9 Surface quality

There shall be no cracks, raw edges, peelings, leakage of aluminum, adhesion

of aluminum, bubbles and pits on the surfaces of the copper clad aluminum

plate, sheets and strips. It is allowed to have surface defects that can be

removed by grinding. However, after removal, the surface quality shall conform

to the requirements for the tolerance of the cladding copper metal's thickness

ratio.

5.1 Chemical composition

As for the cladding copper metal, the chemical compositions shall be analyzed

according to the provisions of GB/T 5121 (all parts) or YS/T 482, and the referee

shall be carried out in accordance with the provisions of GB/T 5121 (all parts).

As for the base aluminum metal, the chemical compositions shall be analyzed

according to the provisions of GB/T 20975 (all parts) or GB/T 7999, and the

referee shall be carried out in accordance with the provisions of GB/T 20975

(all parts).

5.2 Contour dimensions and tolerances

The contour dimensions and tolerances of the copper clad aluminum plate,

sheets and strips shall be tested according to the provisions of GB/T 26303.3.

5.3 Cladding copper metal's thickness ratio

5.3.1 The cladding copper metal's thicknesses of the copper clad aluminum

plate, sheets and strips shall be tested according to the provisions of GB/T 6462.

5.3.2 SELECT three penetrative test pieces on the cross sections of the

copper clad aluminum plate, sheets and strips according to the positions A-A,

B-B and C-C shown in Figure 2.

P2 test piece specified in Table B.1 of GB/T 228.1-2010.The Vickers hardness

test shall be carried out according to the provisions of GB/T 4340.1.

5.5 Bending property

The bending properties of the copper clad aluminum plate, sheets and strips

shall conform to the provisions of GB/T 232.

5.6 Peel strength

The peel strengths of the copper clad aluminum plate, sheets and strips shall

be tested according to the provisions of GJB 446.

5.7 Recombination rate

The recombination rates of the copper clad aluminum plate, sheets and strips

shall be tested according to the ultrasonic testing method in Annex A of GB/T

8165-2008.The test pieces for the test shall be selected when the thicknesses

of the plates, sheets and strips are greater than or equal to 6mm during the

product processing.

5.8 Thermal stability

5.8.1 The thermal stability test of the copper clad aluminum plate, sheets and

strips shall be conducted according to the provisions of Sections 5.8.2 and 5.8.3

of this Standard and by reference to GB/T 2423.22.

5.8.2 TAKE 200mm × 100mm copper clad aluminum plate, sheets and strips.

PLACE them in an environment with a temperature of 85°C and a relative

humidity of 85% for 1,000h. TEST the peel strength according to the provisions

of Section 5.6.

5.8.3 TAKE 200mm × 100mm copper clad aluminum plate, sheets and strips.

PLACE the samples in a freezer at -50°C for 5min. TAKE them out. PLACE

them in the air for 5min. TRANSFER them into a drying oven at 130°C for 5min.

TAKE them out. PLACE them in the air for 5min. TRANSFER them into a freezer

at -50°C. After cycling for 1,000 times, TEST the peel strength according to the

provisions of Section 5.6.

5.9 Surface quality

USE the visual observation method or a five times magnifier to inspect the

surface quality of the copper clad aluminum plate, sheets and strips.

Tensile property

TAKE 2 rolls (pieces) at random from each batch;

TAKE 1 test piece along the rolling direction from

each roll (piece)k

4.4 5.4

Vickers hardness TAKE 2 rolls (pieces) at random from each batch; TAKE 1 test piece from each roll (piece) 4.4 5.4

Bending property TAKE 2 rolls (pieces) at random from each batch; TAKE 1 test piece from each roll (piece) 4.5 5.5

Peel strength TAKE 2 rolls (pieces) at random from each batch; TAKE 1 test piece from each roll (piece) 4.6 5.6

Recombination rate TAKE 2 rolls (pieces) at random from each batch; TAKE 1 test piece from each roll (piece) 4.7 5.7

Thermal stability TAKE 2 rolls (pieces) at random from each batch; TAKE 1 test piece from each roll (piece) 4.8 5.8

Surface quality Roll by roll (piece by piece) 4.9 5.9

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