The 4000 seriyali alyuminiy lasan Al + Si qotishmasidir (orasida silikon tarkibi 4.5-6.0%), yuqori kremniy tarkibiga ega alyuminiy qotishmasi. Asosiy qotishma element sifatida kremniy bo'lgan ushbu alyuminiy qotishmasini issiqlik bilan ishlov berish orqali mustahkamlash mumkin emas. Ko'pincha qurilish va ba'zi mexanik qismlar uchun ishlatiladi.
4 seriyali alyuminiy rulolar past erish nuqtasi xususiyatlariga ega, high temperature resistance and wear resistance, and are often used as welding materials.
The representative models of 4 series aluminum coils are 4a01 aluminum coil, a4043 aluminum coil, 4300 alyuminiy lasan, 4032 alyuminiy lasan, 4 seriya 4343 alyuminiy lasan, 4 series 4A17 aluminum coil, 4 series 4A11 aluminum coil
