| 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 | AA7072 | 8%-12% | ||||||||||||
| 2. Product size and tolerance | ||||||||||||||
| No. | Specification | Size | Tolerance | |||||||||||
| 2.1 | Width (mm) | 16/18/22/26/32/40,etc. | within ±0.08 | |||||||||||
| 2.2 | Height (mm) | 1.5/2.0,etc. | ±0.06 | |||||||||||
| 2.3 | Wall Thickness (mm) | 0.28 to 0.35 | ±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 | ||||||||||||
| 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. |
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| 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). | ||||||||||||
