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What are the specifications of stainless steel tubes?

Views: 0     Author: Site Editor     Publish Time: 2021-07-11      Origin: Site

What are the specifications of stainless steel tubes?


With a large number of applications of stainless steel tubes, many different types have also been developed. Faced with these complicated models, many people will fall into confusion when choosing. Let's take a look at the specifications of the stainless steel tube.

 

Here is the content list:

The production method of stainless steel tube

Section shape of stainless steel tube

End shape of stainless steel tube

Use classification of stainless steel tube

Material classification of stainless steel tube

 

The production method of stainless steel tube

Stainless steel tubes are divided into seamless tubes and welded tubes according to the production method. Seamless steel tubes can be divided into hot-rolled tubes, cold-rolled tubes, cold-drawn tubes, and extruded tubes. Cold-drawn and cold-rolled are the secondary types of steel tubes. Processing; the welded tube is divided into a straight seam welded tube and a spiral welded tube.

 

Section shape of stainless steel tube

Stainless steel tubes can be divided into round tubes and special-shaped tubes according to the cross-sectional shape. Special-shaped tubes include rectangular tubes, rhombus tubes, oval tubes, hexagonal tubes, octagonal tubes, and various asymmetrical cross-section tubes. Special-shaped tubes are widely used in various structural parts, tools, and mechanical parts. Compared with round tubes, special-shaped tubes generally have larger moments of inertia and section modulus and have greater resistance to bending and torsion, which can greatly reduce structural weight and save steel.

Stainless steel tubes can be divided into equal-section tubes and variable-section tubes according to the shape of the longitudinal section. Variable section tubes include tapered tubes, stepped tubes, and periodic section tubes.

 

End shape of stainless steel tube

Stainless steel tubes can be divided into smooth tubes and threaded tubes (threaded steel tubes) according to the state of the tube ends. The threaded tube can be divided into the ordinary threaded tube (tubes for conveying water, gas, and other low pressure, which are connected by ordinary cylindrical or tapered tubes) and special threaded tubes (tubes for petroleum and geological drilling. For important threaded tubes, use Special thread connection). For some special tubes, to compensate for the influence of the thread on the strength of the tube end, the tube end is usually thickened (internal thickening, external thickening, or internal and external thickening) before turning the wire.

 

Use classification of stainless steel tube

According to the purpose, it can be divided into oil well stainless steel tubes (casing, tubing and drill tubes, etc.), line tubes, boiler tubes, mechanical structure tubes, hydraulic prop tubes, gas cylinder tubes, geological tubes, chemical tubes (high-pressure fertilizer tubes, petroleum cracking tubes, etc.) ) And ship tubes.


Material classification of stainless steel tube

Stainless steel tubes can be divided into Cr series (400 series), Cr-Ni series (300 series), Cr-Mn-Ni (200 series), and precipitation hardening series (600 series) according to their composition.

200 series-chromium-nickel-manganese austenitic stainless steel 300 series-chromium-nickel austenitic stainless steel.

301-----Good ductility, used for molded products. It can also be hardened by mechanical processing. Good weldability. Abrasion resistance and fatigue strength are better than 304 stainless steel.

302-----The corrosion resistance is the same as that of 304, and the strength is better due to the relatively high carbon content.

303-----It is easier to cut than 304 by adding a small amount of sulfur and phosphorus.

304-----namely 18/8 stainless steel. The GB grade is 0Cr18Ni9. 309—Compared with 304, it has better temperature resistance.

316-----After 304, the second most widely used steel grade is mainly used in the food industry, pharmaceutical industry, and surgical equipment. The addition of molybdenum makes it a special corrosion-resistant structure. Compared with the 304 stainless steel tube, it has better resistance to chloride corrosion, so it is also used as "marine steel". SS316 is usually used in nuclear fuel recovery devices. 18/10 grade stainless steel tube usually also meets this application level.

 

I believe you have a detailed understanding of the specifications of stainless steel tubes. Wuxi Minstar Steel Co., Ltd. conducts many tests on stainless steel tubes before they leave the factory, and the quality qualification rate is guaranteed. If you are in the stainless steel tube business, you can consider our cost-effective products.


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