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They are widely used in automotive components like engine cylinder heads, pistons, pump housings, and transmission cases, as well as in structural brackets, housings, and mechanical parts including gears,compressor rotors,etc.
| 4XXX Series Aluminum-Si Alloys Commonly used grades of 4XXX series hard aluminum include: 4043，4047，4032， 4015， 4004， 4145, among others. Chemical composition of the 4XXX series aluminum-copper alloy: | ||||||||||||
| Si | Fe | Cu | Mn | Mg | Cr | Zn | Ti | Others | AL | |||
| Each | Total | |||||||||||
| 0.5-13.5 | 0.6-1.0 | 0.15-0.3 | 0.05-1.3 | 0.05— 1.3 | — | 0.1-0.25 | 0.05—0.2 | 0.05 | 0.20 | ≥90 | ||
| Mechanical and Physical Properties of 4XXX Aluminum-Si Alloy Mechanical Properties: Tensile Strength σb (MPa): 200-250 Yield Strength σ0.2 (MPa): ≥130 Hardness (H24 Temper): HB 45-75 Elongation: 14% Sample Size: Aluminum Plate Note: Mechanical properties are for aluminum plate at room temperature (transverse direction). Tempers for 4XXX Aluminum-Si Alloy: H24,H14, H34, O,T6,T4 Grades and Chemical Composition Table of 4XXX Series Aluminum-Si Alloys: (Final parameters are subject to actual product testing) | ||||||||||||
| Grade | Chemical Composition (%) | |||||||||||
| Si | Fe | Cu | Mn | Mg | Cr | Zn | Ti | Others | Al | |||
| Each | Total | |||||||||||
| 4043 | 4.5 – 6.0 | 0.8 | 0.3 | 0.05 | 0.05 | — | 0.2 | — | 0.20 | 0.05 | 0.20 | Bal. |
| 4047 | 11.0 – 13.0 | 0.8 | 0.3 | 0.1 | 0.3 | — | 0.2 | — | 0.2 | 0.05 | 0.15 | Bal. |
| 4032 | 11.0 – 13.5 | 1.0 | 0.5 | 0.05 | 0.8 – 1.3 | — | 0.25 | — | 0.05 | 0.05 | 0.15 | Bal. |
| 4015 | 2.5 – 3.5 | 0.6 | 0.15 | 0.05 | 0.05 | — | 0.10 | — | 0.15 | 0.05 | 0.20 | Bal. |
| 4004 | 0.5 – 1.3 | 0.7 | 0.2 | 0.8 – 1.3 | 0.05 | — | 0.20 | — | 0.1 | 0.05 | 0.20 | Bal. |
| 4145 | 9.3 – 10.7 | 0.8 | 0.15 – 0.35 | 0.1 | — | — | 0.2 | — | 0.2 | 0.05 | 0.15 | Bal. |
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