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S355JR Pitch-Black

Black annealed pipe is a type of annealed thin-walled steel pipe with an unglazed surface that appears black in color.During the manufacturing process, this steel tube undergoes a specific annealing treatment to soften its physical properties for further processing and welding.


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Black annealed pipe is a type of annealed thin-walled steel pipe with an unglazed surface that appears black in color.During the manufacturing process, this steel tube undergoes a specific annealing treatment to soften its physical properties for further processing and welding.

Black annealed tubes are usually made from A3 material for the purpose of preventing rust. This type of steel pipe needs to be handled with care when being welded, as tearing may occur if not handled properly. Although this is relatively rare, tearing can be caused by water on the surface of the weld master, surface rust, or improper choice of welding rod.

In addition, the Black Retreat Tube has excellent electrical conductivity with a very low resistivity, which ensures the quality of high-precision signal transmission. At the same time, it also has very good annealing characteristics and excellent mechanical properties, high temperature resistance, not only can withstand sufficient mechanical stress, but also can withstand high temperatures without easy deformation.

In specific applications, black annealed pipe can be used for the transmission of hot and cold water, especially suitable for occasions that require bending, flaring and other processing operations. In addition, black annealed tubing is used to make thermocouple compensation wires, which act as compensation in thermocouple measurements. The triangular cross-section design of this tubing saves material and installation costs, while reducing the size of the instrument for ease of construction.

 

 

Application:

It is a long piece of steel with a hollow cross-section and no seams around it. Steel pipe has a hollow cross-section and is used in large quantities as a pipeline for the transportation of fluids such as oil, natural gas, coal gas, water and certain solid materials. Compared with solid steel such as round steel, steel pipe is lighter in weight when the bending and torsion strength is the same, and it is a kind of economic cross-section steel, which is widely used in the manufacture of structural and mechanical parts, such as oil drilling rods, automobile driveshafts, bicycle frames, and steel scaffolding used in building construction. Steel pipe manufacturing ring-shaped parts, can improve material utilization, simplify the manufacturing process, save materials and processing time, such as rolling bearing rings, jack sets, etc., is widely used in steel pipe to manufacture. Steel pipe or a variety of conventional weapons indispensable materials, gun barrels, gun barrels, etc. to steel pipe to manufacture. Steel pipe according to the shape of the cross-sectional area of different can be divided into round pipe and shaped pipe. Since the circular area is the largest under the condition of equal perimeter, more fluid can be transported with circular pipe. In addition, the circular cross-section is more uniformly stressed when subjected to internal or external radial pressure, therefore, the vast majority of steel pipes are round pipes. However, the round tube also has certain limitations, such as under the conditions of plane bending, round tube is not as strong as the square, rectangular tube bending strength, some agricultural equipment skeleton, steel and wood furniture, etc. are commonly used square, rectangular tube. According to different uses also need to have other cross-sectional shape of the shaped steel pipe.

 

 

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FAQ

zhongyi

Are you a manufacturing company or a trading company?


zhongyi

We are a manufacturer of metal materials and products with many years of experience.

zhongyi

Can you provide samples?


zhongyi

We can provide free samples, but samples are subject to a sample fee, which is refundable upon order confirmation.

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How can I get an accurate quotation?


zhongyi

Please provide the product standard, material, size, quantity and other information.

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What kind of payment terms do you accept?


zhongyi

We can accept T/T, L/C, Western Union or negotiation.

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What markets do you mainly sell to?


zhongyi

Australia, America, Asia, Middle East, Western Europe, Africa, etc

zhongyi

Can you deliver the goods on time?


zhongyi

Yes, whether the price changes or not, we guarantee to provide the best quality products and on time delivery. Integrity is the purpose of our company.

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Factory

Shandong Zhongyi Metal Products Co., Ltd. is an enterprise specializing in the research and development, production, sales and service of metal products. Located in Shandong Province, China, the company covers a vast area with advanced production equipment and testing instruments, and a team of skilled and strong staff.

Zongyi Metal Products Co., Ltd. mainly produces all kinds of metal products, serving the industries of precision machinery parts, automobile parts, electronic components, construction and decoration materials. Adhering to the business philosophy of "Quality is the foundation, Innovation is the soul", the company constantly introduces advanced technology and equipment to improve product quality and reduce production costs to meet customer needs.

We have rich experience in the metal products industry, and our products sell well in domestic and international markets and are well received by customers. We always adhere to the customer-centered, market-oriented, in order to survive, innovation and development. We are willing to cooperate with customers at home and abroad to create a better future.

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