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4043 Aluminum Sheet is a silicon-based aluminum alloy containing approximately 4.5–6.0% silicon, engineered for superior weldability and corrosion resistance. The high silicon content enhances molten metal fluidity, minimizes cracking susceptibility, and provides a bright, smooth weld appearance. While 4043 is widely known as a filler or welding alloy (wire or rod), it is also available in sheet, strip, and coil forms for applications that demand excellent joining performance and stable corrosion protection. This alloy is ideal for welded assemblies, automotive parts, and heat exchangers where consistent quality and reliable weld integrity are critical.
| Alloy | 4043 (Al-Si Alloy, UNS A94043) |
| Temper | O (Annealed), H12–H14 (Cold Worked, optional) |
| Thickness Range | 0.1 mm – 20 mm (common: 1.0–12 mm) |
| Width Range | 1000 mm – 2000 mm (custom up to 2650 mm) |
| Length Range | 1000 mm – 6000 mm (custom sizes available) |
| Surface Finish | Mill Finish, Anodized, Painted, or PVC-Coated (on request) |
| Standard | ASTM B209, UNS A94043, AWS A5.10 (for welding alloy reference) |
| Application | Welding filler plates, brazing sheets, automotive and marine components, heat exchangers, and structures requiring high weldability and corrosion resistance |
| Alloy | Temper | Thickness (mm) | Width (mm) | Length (mm) | Surface Finish | Standard |
|---|---|---|---|---|---|---|
| 4043 | O | 0.8 | 1000 | 2000 | Mill Finish | ASTM B209 |
| 4043 | O | 1.0 | 1250 | 2500 | Mill Finish | ASTM B209 |
| 4043 | O | 1.5 | 1500 | 3000 | Mill Finish | ASTM B209 |
| 4043 | O | 2.0 | 1250 | 2500 | Mill Finish | ASTM B209 |
| 4043 | O | 3.0 | 1500 | 3000 | Mill Finish | ASTM B209 |
| 4043 | O | 4.0 | 1500 | 3000 | Anodized | ASTM B209 |
| 4043 | O | 5.0 | 1500 | 3000 | Mill Finish | ASTM B209 |
| 4043 | O | 6.0 | 2000 | 4000 | Mill Finish | ASTM B209 |
