Changsha HCADTO Stainless Steel Co., Ltd.

Classification and grade of   stainless steel Grading: ①National standard GB ②Industry standard YB ③Local standard ④Enterprise standard Q/CB Classification: ①Product standard ②Packaging standard ③Method standard ④Basic standard Standard level (in three levels):  Y level: International advanced level  I level: International general level  H level: Domestic advanced level GB： GB1220-84 Stainless Steel Bars (Class I), GB4241-84 Stainless Steel Welded Discs (Class H) GB4356-84 Stainless Welding Disc Garden (Class I), GB1270-80 Stainless Steel Pipe (Class I) GB12771-91 Stainless Welded Pipe (Class Y), GB3280-84 Stainless Cold Plate (Class I) GB4237-84 Stainless Steel Hot Plate (Class I), GB4239-91 Stainless Cold Strip (Class I)

The differences between cold rolled steel and stainless steel are mainly reflected in three aspects, respectively, the use, characteristics, and raw materials. 1. Different applications: A. Main uses of cold rolled steel: mainly used in automobile manufacturing, electrical products, and so on. B. Main uses of stainless steel: the majority of  stainless steel products  need good welding performance of raw materials, like tableware, vacuum cup, steel pipe, water heater, water dispenser, etc 2. Different Characteristics: A. Characteristics of the cold rolled steel: Because there is no annealing treatment, its hardness is very high (HRB > 90); The machining performance is very poor, only simple directional bending less than 90 degrees can be carried out. B. Characteristics of stainless steel: weldability, corrosion resistance, polishability, heat resistance. 3. Different raw materials: A. Raw material of cold rolled steel: Cold rolled sheet is a product made of hot rolled coil ...

Because of the thermal hardness and thermal conductivity of   stainless steel pipes   are low, and it is difficult to process with wire rolling technology. The processing difficulties are in the following aspects. 1. Due to the thermal hardness of the stainless steel pipe material, the degree of correction of the thread forming by the roller during the rolling process is limited, so the rolling process needs to increase the roughness of the pipe surface; (2) The surface of the stainless steel pipe is hard, and the pressure required for rolling is higher, and its surface pressure value is 30%-100% higher than that of the carbon steel pipe of the same diameter; (3) Although stainless steel pipes with low surface hardness are easy to roll and form threads, the threads are pierced after tightening with pipe fittings, and the threads are easily damaged during disassembly and assembly; (4) The thermal conductivity of stainless steel pipes is low. During the rolling process, the temp...

The construction industry is inseparable from stainless steel plates.  Stainless steel plate  has good corrosion resistance performance, so now many steel plate manufacturers are increasing the production of stainless steel plate. But there are also some illegal vendors, and they only pursue benefits but ignore the quality of stainless steel plates. Below we will introduce several stainless steel plate selection methods.  1. When selecting stainless steel plate, we should consider its uses and application environment. For example, the welded pipe is generally used for decoration; seamless pipe is usually used for fluid transport; for medical or kitchen, we often use sanitary grade stainless steel plates. Generally, 200 series stainless steel materials are used indoors, 304 materials are used outdoors, however, 316 materials and others are generally used in acidic, alkaline places or coastal areas. 2. Make sure the material is qualified. Take 304 as an example  a. Fr...