3A21 aluminum suppliers
4 verified Chinese mills with 3A21 in their product line — compiled from official-site evidence + SAMR business scope. All suppliers →
SupplierTierLocationCategoryAlloys
Ningbo Huanqiu AluminumBNingbo, ZhejiangHệ thống nhôm kiến trúcQirui Aluminum SuzhouBSuzhou, JiangsuHệ thống nhôm kiến trúcXuzhou Henghao AluminumBXuzhou, JiangsuNhôm định hình công nghiệpJiangsu Maidi Aluminum GroupBSuzhou, JiangsuHệ thống nhôm kiến trúcEditorial-neutral aggregation — suppliers cannot pay for placement. Alloy coverage verified from official-site product pages and GB/T standard scope. Confirm exact temper and spec via RFQ.