About Qingdao Zhongnuo Steel - Steel Coils Supplier in China

Qingdao Zhongnuo Steel operates out of China and currently lists 28 active products. The catalogue spans steel coils, electric transformers, packaging items, steel sheets, tractors, mushrooms, steel balls and steel structures. Within the steel segment the supplier offers hot‑dipped galvanized coils (HS 7210.49), pre‑painted galvanized coils (HS 7210.70), galvalume coils (HS 7210.61) and various corrugated sheet forms (HS 7210.30, 7210.70). Transformer listings include oil‑immersed units from 35 kV up to 110 kV, while packaging products cover flexible bags, pouches and pet‑food containers. The non‑steel items such as walking tractors, ganoderma lucidum mushrooms and harvesters are also enumerated without HS codes in the provided data.

Product Range and Specialties of Qingdao Zhongnuo Steel

The steel coil portfolio includes Hot‑Dipped Galvanized Iron (HDGI) and Galvanized Iron (GI) coils with zinc coating weights ranging from 60 g/m² to 275 g/m², typically conforming to Chinese GB/T 700 and international ASTM A123 specifications. Pre‑painted Galvanized (PPGI) coils are offered with polyester or PU topcoats, a common industry practice for roofing and appliance panels, and often meet ISO 1461 surface‑treatment standards. Galvalume (Al‑Zn‑Si alloy) coils listed under HS 7210.61 use the AZ150 coating (55 % Al, 43.5 % Zn, 1.5 % Si) and are comparable to the ASTM A792/A792M grade used for corrosion‑resistant building facades. Steel balls are supplied in chrome steel (AISI 52100), stainless steel (440C) and carbon steel, matching typical hardness of 58‑62 HRC for bearing applications. Packaging items are manufactured from multi‑layer polyethylene or PET films, a standard material set for flexible food‑grade packaging in HS 3920‑3923 ranges.

Trade and Export Information - Qingdao Zhongnuo Steel

China remains one of the world’s largest exporters of flat‑rolled steel products, with HS chapter 72 codes (7210.x) routinely shipped to construction, automotive and appliance manufacturers in Southeast Asia, the Middle East and Europe. Buyers usually request compliance with ISO 9001 quality management and, for coated steel, certification to ISO 1461 or ASTM A792 for galvalume. Oil‑immersed power transformers are classified under HS 8504 and often require IEC 60076 test reports and CE marking for European markets. Packaging films fall under HS 3920‑3923 and are subject to food‑contact regulations such as EU Regulation 1935/2004 and US FDA 21 CFR 177. Packaging shipments are commonly packed in 20‑ft or 40‑ft containers, with coil loads weighing up to 20 t per container, while steel balls are usually bulk‑shipped in wooden crates.

Sourcing from Qingdao Zhongnuo Steel - Buyer Guidance

When sourcing steel coils from Qingdao Zhongnuo Steel, request mill certificates that specify coating weight (g/m²), tensile strength (MPa) and compliance with GB/T 700 or ASTM A653. For pre‑painted coils ask for colour match charts, polyester/PU film thickness (µm) and weather‑ing test results (e.g., ASTM D4587). Transformer buyers should obtain type test reports, IEC 60076 certification and, where applicable, CE conformity statements. Packaging suppliers typically provide food‑contact compliance certificates, melt flow index (MFI) data and barrier performance figures (WVTR). Verify the HS code on the commercial invoice and confirm that the product description, coating grade and dimensions match the sample before finalising the order.

What coating weight is available for the galvanized coils listed under HS 7210.49?

The supplier specifies zinc coating between 60 g/m² and 275 g/m², which aligns with the typical range for hot‑dip galvanized steel used in construction and automotive panels.

Do the pre‑painted galvanized coils meet any international surface‑treatment standards?

The PPGI coils are described as having a polyester or PU topcoat and are comparable to the ISO 1461 or ASTM A792 specifications commonly required for colour‑coated roofing sheets.

Which alloy is used for the galvalume coils (HS 7210.61)?

The galvalume product uses an Al‑Zn‑Si alloy known as AZ150 (55 % Al, 43.5 % Zn, 1.5 % Si), a standard composition for corrosion‑resistant building cladding.

What material standards apply to the steel balls (HS 8482.91)?

Steel balls are offered in chrome steel AISI 52100, stainless steel 440C or carbon steel, grades that typically meet hardness of 58‑62 HRC and are used in bearing applications worldwide.

Are there any certifications that buyers should request for the transformers?

Buyers should request IEC 60076 type test reports, CE marking documentation for European destinations and, where required, local safety approvals such as UL for North American markets.

What packaging formats are available for flexible bags and pouches?

The catalogue lists printed flexible packaging bags, liquid and spouted pouches and pet‑food bags, all fabricated from multi‑layer polyethylene or PET films that meet common food‑contact regulations (EU 1935/2004, US FDA 21 CFR 177).