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2022-06

Quality Characteristics of Stainless Steel

In general, the required material thickness tolerances vary depending on the type of stainless steel product. For example, Class II tableware and insulated cups typically demand tighter tolerances, around –3% to +5%, whereas Class I tableware usually calls for a tolerance of –5%, and steel pipes require –10%. For materials used in hotel refrigeration cabinets, the thickness tolerance is specified at –8%.

2022-06

Precautions for the Maintenance and Inspection of Ball Valves, and Methods for Storing Ball Valves

As the pace of modern industrialization accelerates, mechanical equipment is becoming increasingly prevalent in daily life, and the pace of living is steadily quickening. Consequently, demand for dairy products, beverages, and fast‑food items is rising, which in turn is driving growth in the heat‑treatment steel strip industry. Heat‑treatment steel strips are widely used in the market, enriching consumers’ choices and generating substantial profits for many manufacturers. These strips are suitable for applications such as die‑cutting blades, etching dies, corrosion dies, substrates for large circular saw blades, machine tool guideways, railway joint plates, and military‑grade components. At present, large‑size, high‑strength heat‑treatment steel strips are entirely imported and subject to stringent export restrictions imposed by producing countries.

2022-06

Enhancing the processing technology for heat-treated steel strips

Steel strip is a narrow, long steel plate produced by various rolling mills to meet the needs of different industrial sectors for the mass production of metal and mechanical products. Also known as strip steel, it typically has a width of 1,400 mm or less, with length varying slightly depending on the size of each coil. Strip steel is generally supplied in coils and offers advantages such as high dimensional accuracy, excellent surface quality, ease of processing, and material savings. Like steel plates, steel strip is classified into two main categories—common‑grade strip and high‑quality strip—based on the material used, and into two types—hot‑rolled strip and cold‑rolled strip—according to the manufacturing process.

2022-06

Causes of Common Surface Defects in Cold-Rolled Strip Steel

The types and causes of surface defects in cold‑rolled strip steel are highly complex; such defects can arise at every stage, from steelmaking and hot rolling through cold rolling to end‑user application. Consequently, controlling surface defects is of paramount importance. Next, the cold‑rolled strip steel manufacturer, Hualuo Steel Strip Co., Ltd., will provide a brief analysis.

2022-06

Q&A on Cold-Rolling Production Processes

What are the requirements for the incoming material of cold-rolled sheet in a rolling mill?

2022-06

Summary of Defects in the Steel Strip Pickling and Cold Rolling Processes

Hot-rolled raw material, push‑pull hydrochloric acid pickling, single‑stand reversible cold rolling, electro‑degreasing and rinsing, full‑hydrogen (or nitrogen–hydrogen) annealing furnace, single‑stand skin‑pass rolling, heavy‑coil slitting (or cross‑slitting), stretch‑bend straightening, packaging, storage, and transportation, among others.

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