news — from the mill.
Production notes, industry updates, and a little colour on what we’re making this month.
Stone Coated vs PPGI Roofing Sheets: Cost and Lifespan Comparison
Walk any building materials market in Lagos, Accra or Nairobi and you will see the same two products competing for every roof: stone coated metal tiles and PPGI long-span sheets. Both start as aluzinc-coated steel coil; the difference is what happens after. Here is the honest comparison distributors give their own customers. Side-by-Side Comparison Parameter […]
Read →Roofing Sheet Price in Nigeria 2026: Importer Guide to PPGI and Aluzinc Coil
Nigeria is one of the largest roofing sheet markets in Africa, and nearly all long-span and step-tile sheets sold in Lagos, Abuja and Onitsha start life as imported PPGI or aluzinc coil. This guide explains what actually sets the price — written for importers and roll-formers buying by the container, not per sheet. What Drives […]
Read →AZ150 vs Z275: Galvalume or Galvanized Coil for Roofing?
Roofing buyers weighing AZ150 galvalume against Z275 galvanized are really choosing between two protection philosophies: aluminium-zinc barrier life versus pure zinc sacrificial protection. Both are premium coating classes; they win in different situations. Head-to-Head Comparison Parameter AZ150 Galvalume Z275 Galvanized Coating composition 55% Al, 43.4% Zn, 1.6% Si ~100% zinc Coating mass 150 g/m² 275 […]
Read →SGCC vs DX51D: What Is the Difference Between These Galvanized Grades?
Importers constantly ask whether SGCC and DX51D are the same material. Short answer: they are the commercial-quality galvanized grades of two different standards families — SGCC under Japanese JIS G3302, DX51D under European EN 10346 — and for most forming and roofing work they are interchangeable. The details matter when your buyer or consultant writes […]
Read →Z180 vs Z275 Zinc Coating: Which Galvanized Steel Coil Should You Order?
Zinc coating mass is the single biggest driver of galvanized coil price after the base steel itself. Z180 and Z275 are the two most quoted classes under EN 10346, and choosing between them changes both your landed cost and how long the steel survives in service. Here is the practical comparison we walk buyers through […]
Read →
Hot Rolled vs Cold Rolled Steel Coil for Galvanizing: 2026 Guide
When selecting a hot rolled vs cold rolled steel coil for galvanizing, manufacturers must understand how each substrate performs in the galvanizing process. This choice directly impacts the quality of GI coil and PPGI coil output. At ChinaCNU Steel, our Qingdao factory has exported over 500,000 tons of galvanized steel coil to 80+ countries since […]
Read →
Mill Test Certificate MTC for Galvanized Coil: Complete Buyer Guide 2026
Every professional buyer of hot dip galvanized coil knows that a mill test certificate MTC for galvanized coil is the single most important document for verifying product quality, chemical composition, and mechanical properties. Without a valid MTC, you risk receiving substandard GI coil that fails in forming, welding, or corrosion resistance. At ChinaCNU Steel, we […]
Read →
Steel Coil HS Code and Import Duty Guide 2026
Understanding the correct steel coil HS code and import duty guide is essential for any importer of galvanized steel coil, PPGI coil, or GI coil in 2026. Misclassification can lead to costly penalties, delayed customs clearance, and unexpected tariff payments. Whether you are sourcing from China, Vietnam, or India, knowing the exact Harmonized System (HS) […]
Read →
Steel Coil Sample Order Before Bulk Purchase: A Smart Buyer’s Guide
When sourcing galvanized steel coil or PPGI coil for your next project, the most prudent step you can take in 2026 is to place a steel coil sample order before bulk purchase. This single decision protects your capital, verifies material quality, and ensures the product meets your exact specifications before committing to large volumes. At […]
Read →
How to Verify a Galvanized Steel Coil Supplier in 2026
When sourcing materials for construction, automotive, or industrial applications, knowing how to verify a galvanized steel coil supplier is essential to avoid costly quality failures. A reliable supplier ensures consistent zinc coating, proper mechanical properties, and on-time delivery. This guide covers the exact verification steps used by procurement professionals, including factory audits, material testing, and […]
Read →