NEWS-Zhishang Steel

201 and 202: What Replacing Nickel with Manganese Actually Changes2026-10-15

Why 201 and 202 exist, what replacing nickel with manganese does to chemistry, strength, formability and magnetism, where the 200 series should not be used, and···

Welding Carbon and Low-Alloy Steel: Preheat, Hydrogen and the Filler Question2026-10-15

Why a carbon steel datasheet says weldable but still hands the procedure back to the buyer. How carbon, manganese and residual elements raise the carbon equival···

Annealed, Normalised, Quenched and Tempered: Reading the Heat Treatment Code on a Steel Order2026-10-14

A, N+T and Q+T are not three ways of writing the same steel. Why hot rolling is already a thermal process, why annealing has a temperature window that can be ov···

What 'Tested' Actually Means on a Pipe Order: Hydrostatic, NDT, Flattening and Bend2026-10-14

A mill certificate proves what was tested, not what is inside your pipe. What a hydrostatic test finds that a nondestructive electric test cannot, and the rever···

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···