NEWS-Zhishang Steel

Painting Over Galvanized Steel: Why the Zinc Surface Decides Whether the Paint Stays2026-10-13

Zinc protects by sacrificing itself; paint protects by sealing. Put the two together and the interface decides everything. Why chromate passivation and oil are ···

Cold Weather Steel: What Charpy Impact Data Actually Tells a Buyer2026-10-13

Tensile and yield strength say nothing about what steel does at minus 20 C. What the Charpy V-notch test actually measures, why S32760 quotes 80 J at ambient an···

Flat Plate Does Not Happen by Accident: Coil Set, Wavy Edges and What to Specify2026-10-12

Four defects hide behind the words "not flat": coil set, crossbow, wavy edge and centre buckle, plus camber in slit strip. Where the residual stress comes from,···

Seawater Service: Matching the Alloy to Splash Zone, Immersion and Coastal Air2026-10-12

Seawater is three environments, not one: salt-laden coastal air, a splash zone that concentrates chloride by wetting and drying, and warm immersion. Where Z275 ···

Machining Stainless Steel: Free-Cutting Grades, Work Hardening and What to Tell the Shop2026-10-12

The gap between 416HT at 85 per cent of a free-machining carbon steel and an austenitic grade is set by work hardening, elongation and thermal conductivity, not···

Specifying Precipitation-Hardening Stainless: What the Heat Treat Condition Actually Means2026-10-12

Precipitation hardening is a strength range, not a grade. What Condition A, H900, H1075, TH1050, RH950 and CH900 each commit the mill to, why the annealed value···