news — from the mill.
Production notes, industry updates, and a little colour on what we’re making this month.
DX51D vs SGCC vs G550: Steel Coil Grades Explained for Importers
Grade confusion causes more quote mistakes than any other spec. DX51D, SGCC and G550 are not competing qualities — they come from different standards and serve different jobs. Grade Equivalence Table Grade Standard Type Typical Use DX51D EN 10346 Soft, formable Roll forming, bending, general roofing SGCC JIS G3302 Soft, commercial Same jobs — the […]
Read →PPGI vs PPGL for Coastal Roofing: Which Lasts Longer
For inland roofing the answer is usually price. For coastal projects, the base coating under the paint decides how long the roof lasts. Here is the honest comparison between PPGI (zinc base) and PPGL (aluzinc base). Head to Head Factor PPGI (Z base) PPGL (AZ base) Base coating Zinc Z80-Z180 Aluzinc AZ50-AZ150 (55% Al) Flat-surface […]
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0.4mm vs 0.5mm PPGI Thickness for Roofing: Which Is Better?
Choosing between 0.4mm vs 0.5mm PPGI thickness for roofing is a critical decision that directly impacts project cost, structural integrity, and long-term maintenance. Many buyers assume the thinner 0.4mm option is always the budget-friendly choice, but a 15-year total cost of ownership (TCO) analysis reveals that 0.5mm prepainted galvanized steel coil often delivers superior return […]
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Zero Spangle vs Minimized Spangle GI Coil: Key Differences for 2026
When sourcing galvanized steel coil for industrial applications, understanding the surface finish is critical. The choice between zero spangle vs minimized spangle GI coil directly impacts paint adhesion, forming performance, and final product aesthetics. As a leading GI coil supplier China, ChinaCNU Steel—based in our Qingdao factory with 15+ years of export experience—provides ISO-certified hot […]
Read →How Many Tons of Steel Coil Fit in a 20ft or 40ft Container
Container loading determines your real freight cost per ton. Here is what mills and forwarders actually allow when shipping PPGI and GI coil from China. Practical Loading Limits Container Payload Limit Practical Coil Load Why Less Than Max 20GP ~28 t 22-25 t Weight concentration on floor; road limits at destination 40GP ~26-28 t 24-26 […]
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PPGI vs Aluminum Coil for Roofing: Which Material Wins in 2026?
When selecting the optimal material for roofing projects, the debate between PPGI vs aluminum coil for roofing is a critical decision for contractors, architects, and building material suppliers. Prepainted galvanized steel coil, commonly known as PPGI, offers a unique balance of strength, corrosion resistance, and cost efficiency that aluminum coil often cannot match. As a […]
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Z275 vs AZ150 Corrosion Resistance Comparison: Which Coating Wins?
When selecting steel for roofing, siding, or structural applications, understanding the Z275 vs AZ150 corrosion resistance comparison is critical to project longevity and cost efficiency. Z275 refers to a hot-dip galvanized steel coil with a zinc coating weight of 275 g/m², while AZ150 denotes a galvalume (zinc-aluminum alloy) coating of 150 g/m². This article provides […]
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Galvanized vs Galvalume vs Aluzinc Explained: 2026 Guide
Choosing the right corrosion-resistant steel for your project can be confusing. The terms galvanized vs galvalume vs aluzinc explained in this guide will clarify the key differences in composition, lifespan, and cost. Whether you need a hot dip galvanized coil for roofing or an aluzinc steel coil for industrial cladding, understanding these three materials is […]
Read →Z275 vs Z180 vs Z120 Zinc Coating: Which GI Coil Should You Import
Zinc coating weight is the biggest quality-vs-price decision when importing GI coil. Here is how Z120, Z180 and Z275 actually differ in service life and cost. Coating Comparison Coating Zinc (g/m2, both sides) Typical Service Environment Relative Price Z120 120 Indoor framing, ducting, dry climates base Z180 180 General roofing, mild coastal +2-3% Z275 275 […]
Read →PPGI Coil Price per Ton from China: 2026 Cost Breakdown
Importers ask us daily: what is the PPGI coil price per ton from China? There is no single number — price moves with the hot-rolled substrate market, zinc coating weight, paint system and thickness. This guide explains each cost component so you can compare quotes correctly. The 5 Components of PPGI Price Component Share of […]
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