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Characteristics of Stainless Steel Pipe

Although the epidemic has had some impact on sales of stainless steel, however, the long-term outlook for the market remains positive, considering that many countries are likely to stimulate infrastructure projects.

What is the stainless stain pipe?

Stainless Steel (Stainless Steel) pipe is a hollow, long, round steel with stainless steel, corrosion resistance as the main characteristic, made of two or more chemical elements containing iron alloy, and chromium content of at least 10.5%, the maximum carbon content of not more than 1.2%. The basic stainless steel piping is seamless pipe, welded pipe, and pipe flanges.

Characteristics of stainless steel pipe

Corrosion resistance

Almost all stainless steel pipes on the market are iron-based alloys with a minimum chromium content of 10.5%. When the alloy contains chromium, a self-healing or protective oxide layer is formed on the alloy. Stainless steel pipes gain their corrosion resistance through the formation of the oxide layer. The self-healing nature of the oxide layer means that complete corrosion resistance can be achieved regardless of the manufacturing method.

It is self-healing and provides high corrosion resistance even if the surface of the pipe is damaged or cut in any way. On the other hand, a protective layer is formed by plain carbon by coating or painting. The underlying steel and corrosion are exposed to surface modification.

Cryogenic resistance

Low-temperature resistance at low temperatures is measured by ductility or ductility at temperatures below the zero level. The austenitic stainless steels have a significantly higher tensile strength at low temperatures compared to ambient temperatures. They also can maintain excellent toughness in harsh environments.

Precipitation hardening, martensitic and ferritic pipes are not used at sub-zero temperatures. At low temperatures, the grade toughness decreases significantly. Low-temperature resistance has been found to drop to near atmospheric temperatures in some cases.

Work hardening

One of the greatest advantages of work hardening of stainless steel pipe grades is that it significantly increases and enhances the strength of the metal and helps to achieve cold working. The combination of annealing and cold working stages is easy to employ, resulting in manufactured components with the appropriate strength.

Hot strength

High strength can be maintained at peak or elevated temperatures. Grades of stainless steel tubing with high levels of chromium or silicon, and nitrogen is responsible for the thermal strength. Grades with ferritic chromium grades provide high thermal strength.

Stainless steel pipes with high chromium content help to resist scaling at peak or elevated temperatures.

Strength and formability

The different grades of stainless steel pipes offer different strength ranges. Strength remains constant under softer conditions compared to milder strengths. The softer austenitic steel has excellent elongation and ductility. As a result, it can be cold-worked, resulting in a finished product with a wide range of semi-finished products. To achieve the final state, toughness and strength are effectively combined.

Ferritic stainless steel pipes offer a good range of ductility and strength. In the case of martensitic pipes, a subsequent heat treatment produces hardness and high strength.

Ductility

Austenitic stainless steel pipes have a high elongation. The high process hardening and high elongation allow austenitic stainless steel pipes to be formed and work in demanding processes such as deep drawing.

High strength

Stainless steels have a higher tensile strength than mild steels. Compared to austenitic steels, duplex stainless steels typically have higher strengths. The highest levels of tensile strength can be found in the martensitic grades and the precipitation-hardening grades. These grade types have double the strength compared to other grades.

Magnetic response

Magnetic response is generally attractive in stainless steel. Austenitic grades are purely non-magnetic and can be induced in a few austenitic grades by cold working. Grades like 316 and 310 are usually non-magnetic when cold works. All other stainless steel pipe grades are magnetic.

Conclusion

Stainless steel pipe is mainly used in petroleum, chemical, medical, food, light industry, mechanical instrumentation, and other industrial transmission pipelines and mechanical structural components, etc., but its needs and requirements in agriculture and related fields, medicine, natural gas, and other industrial fields are not to be ignored. In addition, it is lighter in weight when the bending and torsional strengths are the same, so it is also widely used in the manufacture of mechanical parts and engineering structures. It is also commonly used for furniture and kitchenware, etc.

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