Laboratory
Fully equipped galvanized and pre-painted steel laboratories for testing and evaluation of products.
Free Sample
We do sample production according to your specifications, you may need to pay the courier fee
After-Sales
The quality of the pre-painted steel is found to be defective during use, and the evidence is retained for claim settlement.
Quality Assurance
Precise Dimensional Tolerances & Tight Control on Zinc Coating Mass. Paint thickness without cutting corners. For some suppliers, the actual product does not match the specification.
What We Offer
Focus on metal coil industry
Free Sample Testing
The composition of the steel coils sold by some suppliers does not match, and the specifications of the pre-painted steel cannot be judged by the naked eye. COJIASTEEL provides free sample testing
Who we are
Reliable Steel Coil Supplier
COJIASTEEL is a PPGI coil , galvanized coil, aluzinc coil manufacturer in Japan. We cooperate with PPG, Beckers, valspar, Nippon and other well-known paint brands to ensure the service life of pre-painted steel. We have the ability to produce Z275 galvanized and AZ150 galvalume. We have 7 steel coil production lines, which have improved the product production capacity.
Featured Articles
Read Knowledge of Steel Coil
Prepainted Galvanized&Galvalume Steel Coil
Prepainted steel coil undergoes several stages to ensure its high performance for various applications. Find out why prepainted steel is more cost-effective and superior than
Galvanized Steel Coil
The addition of zinc in the hot-dip galvanizing process serves as a protective barrier against harsh environments and impurities. Learn more about galvanized steel coil
Galvalume Steel Coil
Galvalume steel coil is a type of steel with a coating of aluminum and zinc, protecting it from oxidation. Learn more about the basics of
PPGI Coil: Purchase Guide and Knowledge
PPGI coil is a very common metal roofing material, this article gives you complete knowledge. What is PPGI Coil? PPGI coil stands for “prepainted galvanized
Testimonials
What they say about us
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