Top Chinese Galvanized & Coated Steel Coil Manufacturers

Wanzhi Group (Zhengzhou, Henan; factory in Boxing, Shandong)

Wanzhi textured PPGI sample (wood/stone grain coating). Wanzhi (Zhengzhou Wanzhi Steel Materials Co., Ltd.) is a specialist in coated steel coils – GI/GL as well as pre-painted galvanized (PPGI) and galvalume (PPGL) products. It offers decorative/prepainted coils (e.g. wood‐grain, stone‐textured, diamond patterns) and standard color coils for construction and appliances. Typical substrates are hot‐dip galvanized/galvalume sheets (DX51D grades) 0.1–0.8 mm thick, with zinc coatings Z30–Z275g/m², then coil-coated in 1–2 primer/topcoat layers. Topcoats include polyester (PE), silicon‐modified polyester (SMP), high‐durability polyester (HDP) and PVDF (fluorocarbon). Products meet ASTM, JIS, GB, EN, ISO standards, and are UV/corrosion resistant.

1. Applications: Roof and wall panels, curtain walls, appliance panels, ceilings, etc. Wanzhi’s textured PPGI coils are popular in architecture/interiors for aesthetic facades and appliances.
2. Exports: Wanzhi exports globally (Europe, Central/Southeast Asia, Middle East). For example, Wanzhi shipped textured PPGI coils and roof panels to projects in Turkmenistan, Azerbaijan, Saudi Arabia and Libya.
3. Capacity/Certifications: 7 coating/galvanizing lines in Shandong produce ~10,000 tons/month. Certifications include ISO 14001, ISO 9001, ISO 45001, SGS and CE. Focus on quality control has built trust in overseas markets.

Shandong Sino Building Material Group (Qingdao, Shandong)

Shandong Sino Building Material Group is a large B2B steel exporter based in Qingdao. It produces GI/GL coils and prepainted PPGI/PPGL coils and sheets, plus corrugated roofing and specialty coated panels. Notably, it makes stone‐coated steel sheets and antibacterial color-coated steel (for kitchens, hospitals, etc.). Zinc coatings reach 40–275g/m², and products range 0.13–1.5 mm thick (DX51D/SGCC grades).

1. Coatings: Uses standard coatings – epoxy or polyester primers, with topcoats in PE, SMP, HDP and PVDF (fluorocarbon). Its antibacterial steel (with silver-ion topcoat) and PVDF‐coated coils meet ISO9001.
   
2. Applications: Civil/industrial building roofs, walls, guttering, plus home appliances and cabinets. Its antibacterial panels serve kitchens, bathrooms, hospitals, etc.
3. Exports: According to the company, Sino Building sells to ~50 countries (Africa, Middle East, Asia, Europe, Americas). It has an annual capacity ~500,000 tons (US$450M sales), reflecting high client trust and experience. Packaging is export-ready; MOQ is typically bulk coil quantities.

Shandong BOMIS New Material Co., Ltd. (Qingdao & Binzhou, Shandong)

Shandong BOMIS New Material (BOMIS Steel Group) is a high‐tech steel coil manufacturer founded 2006. BOMIS operates 4 coil mills and multiple roofing/forming lines, producing galvanized (GI) coils, galvalume (GL) coils, and pre‐painted PPGI/PPGL coils. Its annual output is ~1 million tons, with product range 0.1–3.0 mm thickness, 600–1250 mm width.

1. Coatings: BOMIS offers all RAL colors and patterns (wood grain, brick, camouflage, etc.) in coated coils. Top paints include PE (polyester), SMP and PVDF for PPGI/PPGL products. Galvanized coils (Z15–Z300) are also supplied.
   
2. Export markets: BOMIS exports widely – Europe, Africa, Middle East, Southeast Asia, South America. It emphasizes international quality (ISO/CE). BOMIS states its products have “been certified by internationally recognized testing organizations” for export quality.
3. Applications: Its coated coils are used in building roofs/walls, bridges, appliances, automotive and prefab structures. BOMIS also makes corrugated roofing tiles for construction. Its track record and global shipments (combined with stringent QA) contribute to customer trust.

Shandong Shuangxin New Sheet Co., Ltd. (Boxing, Binzhou, Shandong)

Founded in 2009, Shandong Shuangxin New Sheet (Boxing) focuses on cold‐rolled sheet and coated products. It runs 2 GI galvanizing lines, 1 GL line, 3 PPGI coating lines and a color‐coating line. Main products are GI/GL coils and PPGI/PPGL color‐coated coils and corrugated sheets.

1. Coatings: Standard polyester‐based coatings (PE, SMP, etc.) are applied after galvanizing. The company is ISO 9001 certified.
   
2. Exports: Shuangxin has ~7 years of export experience, selling to global clients in construction and appliance industries. (Typical export MOQ is multiple tons.)
3. Reputation: Customers “recognize and praise” its reliability. Its combination of multiple production lines, quality management and export focus makes it a trusted B2B supplier of galvanized and prepainted coils for facades, roofing and profiles.

Sources: Company websites and profiles (Wanzhi Group, Sino Building Material, BOMIS, Shuangxin), with emphasis on product specs, coatings and export records.