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Industry News
13 2026-10

Cold, Steel and the Charpy Test: Why Service Temperature Changes What You Order

Cold does not weaken steel so much as remove its ability to absorb energy. A look at brittle fracture, the Charpy test and how to specify steel for low service ···

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12 2026-10

Metal Roofs Move: Thermal Expansion and the Details That Keep a Roof Tight

Steel roofing grows and shrinks every day. How much it actually moves, what that movement does to fixings and laps, and the detailing that keeps a metal roof ti···

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10 2026-10

When Two Metals Touch: Galvanic Corrosion and How to Break the Circuit

Galvanic corrosion starts where two different metals touch and get wet. Which metal pairs matter on steel buildings, where the reaction starts, and the cheap de···

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09 2026-10

Solar Mounting Steel: What Keeps a PV Array Standing for Twenty-Five Years

What steel actually holds a solar array up: choosing between hot-dip galvanizing and ZAM coatings, profile and thickness decisions for rails and purlins, and th···

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08 2026-10

Container Rain: Why Steel Arrives Wet and What Actually Prevents It

Why condensation forms inside shipping containers and marks steel in transit, and the practical steps - dry loading, desiccants and proper wrapping - that actua···

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30 2026-09

Your 1.0mm Sheet Measured 0.95mm: Thickness Tolerance Without the Panic

Why a coil can read below its nominal thickness and still be fully within standard - and how thickness tolerance changes weight, price and measurement.

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29 2026-09

Steel Near the Sea: How to Spec Sheet and Coil for Salt Air

Choosing galvanized, aluminium-zinc or color coated steel for coastal sites: corrosivity categories, coating weights, fastener details and maintenance that make···

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28 2026-09

Zinc-Aluminium-Magnesium Coated Steel: Where It Wins, Where It Doesn't

Where zinc-aluminium-magnesium coatings beat plain galvanized, where they do not, and how to compare the two properly in a real tender.

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24 2026-09

Roof Sheet Geometry: Purlin Spacing, Lap Lengths and the Pitch That Decides the Rest

Purlin spacing, end laps, side laps and minimum pitch for screw-fixed metal roofing, and why the span table decides the job before the first screw goes in.

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23 2026-09

Why Two Batches of the Same RAL Colour Don't Match: Delta E and Colour Tolerance

Why two batches of the same RAL colour can look different, how Delta E measurements and agreed tolerances settle colour disputes on painted steel.

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Zhishang Steel Co., Ltd


Zhishang Steel, specializing in domestic steel products trade, warehousing, processing and other services. The team has four service teams: Shandong Zhishang Steel Co., LTD., Shandong Zhiyiheng Trading Co., LTD., Tai 'an Zhishang Economic and Trade Co., LTD., Shandong Zhishang Steel Structure Co., LTD. Mainly engaged in steel coil, coated, stee···

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