NEWS-Zhishang Steel

After the Weld: Cleaning, Pickling and Passivating Stainless Steel2026-10-10

The corrosion resistance of stainless steel is a nanometre-scale film, and welding replaces it with oxide scale and a chromium-depleted layer. Why heat tint is ···

Sour Service Pipe: What NACE MR0175, HIC and SSC Testing Actually Cover2026-10-10

Sour service is not one risk but two. What MR0175 actually qualifies, what TM0177 and TM0284 each measure, why the HIC coupon and the SSC coupon ask different q···

Reading a Pipe Specification: Nominal Bore, Schedule and What the Wall Actually Is2026-10-09

Two buyers can order 2 inch pipe and both receive standard product with different bores and walls. What NPS and DN actually name, why one schedule number is man···

Specifying Steel for Factory Wall Cladding: Sheet, Sandwich Panel and the Frame Behind It2026-10-09

A factory wall has to keep weather out, carry wind back to the frame and accept every opening the process line needs. How to choose single-skin sheet or cored s···

Fastening Coated Steel: Screw Choice, Dissimilar Metals and the Galvanic Question2026-10-08

The fastener is the only component that penetrates a coated steel roof, and it introduces a second metal. Why the anode-to-cathode area ratio decides which part···

Setting Up Tooling for Coated Sheet: Bend Radius, Shear Clearance and Roll Forming2026-10-08

A coating a few tens of microns thick fails at a bend the base metal survives. How to read the T-bend figure, choose the forming grade, set roll gap and die ope···