1. How is decarburization caused Decarburization is a phenomenon that occurs when the oxidation rate of the steel surface is lower than the diffusion rate of carbon. Both oxidation and carbon diffusion occur strongly at high temperatures above the A1 phase transformation point. Decarburization can

1. Concave correction Features: The outer surface of the steel pipe is spirally concave. Causes: 1) Improper adjustment of the straightening machine roller angle and excessive pressure reduction. 2) Severe wear of the straightening roller, etc. Inspection: The outer surface of the steel pipe is

Seamless steel pipe torque is a key physical parameter in the steel pipe industry. It not only directly affects the performance of steel pipes, but also has important applications in various engineering fields. When analyzing the torque of seamless steel pipes, we need to consider multiple factors,

A333Gr.6 seamless steel pipe is an important material widely used in the field of fluid transportation such as oil and natural gas. Its excellent performance and wide application fields make it play an important role in the industry. Below we will introduce the manufacturing process, performance cha

ASTM A53 GR.B seamless steel pipe is a pipe material widely used in fluid transportation systems. It has excellent mechanical properties and corrosion resistance and is widely used in the transportation of oil, natural gas, water, steam, etc. First, the properties of ASTM A53 GR.B seamless steel

Stainless steel seamless pipes are generally treated when leaving the factory, and there will be no rust on the surface. However, when they are used for a long time and in a harsh environment, some rust that is difficult to remove may appear. At this time, it is necessary to perform a "pickling" cle

316L stainless steel pipe material grade, AISI 316L is the corresponding American grade, sus 316L is the corresponding Japanese grade. My country's unified digital code is S31603, the standard grade is 022Cr17Ni12Mo2 (new standard), and the old grade is 00Cr17Ni14Mo2, indicating that it mainly conta

L360N seamless steel pipe is a high-strength, low-alloy steel pipe material, widely used in industrial fields such as petroleum, natural gas, chemical industry, and electric power. Due to its excellent mechanical properties and corrosion resistance, it can show good performance in various harsh envi

In many fields such as construction engineering, machinery manufacturing, and petrochemicals, steel pipes are an important structural material, and their quality is directly related to the safety and service life of the project. Therefore, it is particularly important to correctly judge the quality

The interior of boiler steel pipes often has defects that are difficult to detect, such as lack of fusion, lack of penetration, slag inclusions, pores, cracks, etc. in the weld. It is impossible to conduct destructive inspections on every boiler or pressure vessel to know the location, size, and nat

First, the surface of low-quality seamless steel pipes is prone to scarring. This is mainly caused by two reasons: (1) Low-quality seamless steel pipes have more impurities and uneven materials. (2) The guide equipment of low-quality pipe manufacturers is simple and is particularly easy to stick

Underground oil extraction tools work in wells thousands of meters deep, with harsh environments and complex stress conditions. Under normal circumstances, the extraction tools must not only withstand tensile stress, and torsional bending stress but also withstand strong friction and impact. At the

When surfacing welding is performed on the surface of 304 stainless steel strips, defects are prone to occur during surfacing welding due to the different metal properties of the surfacing layer, resulting in a decrease in the overall quality of 304 stainless steel strips. What defects during surfac

The following 8 aspects are the main inspection items of seamless steel pipes, precision steel pipes, precision drawn steel pipes, precision rolled steel pipes, and welded steel pipes: 1. Appearance size inspection: surface quality, wall thickness, outer diameter inspection, inner diameter inspec

As a high-quality pipe, American standard steel pipe L245N has important application value in the steel industry. 1. Characteristics of American standard steel pipe L245N American standard steel pipe L245N belongs to a pipe in the API5L standard and has the following main characteristics: - Uni

1. Surface defect-induced quenching cracks When a certain unit rolls 26CrMo4s alloy structural pipes, small quenching cracks often appear on the inner wall. Photos of the polished micromorphology show that there are many surface defects such as pits and warping with a depth of no more than 0.2mm on

Stainless steel pipe fittings are a type of pipe fittings. They are made of stainless steel materials, so they are called stainless steel pipe fittings. They include stainless steel elbows, stainless steel tees, stainless steel crosses, stainless steel reducers, stainless steel pipe caps, etc. Accor

What is corrosion? Corrosion is an electrochemical process in which a metal reacts with its surroundings, and the resulting degradation triggers a loss of material properties such as mechanical strength, appearance, and impermeability to liquids and gases. The cause of corrosion is the energy diffe