Cause analysis and improvement measures of flaw detection for SA588 Gr A grade steel

Compared with seamless pipe, galvanized pipe and other steel, welded pipe has some outstanding characteristics. First of all, it is very simple to judge whether there is weld on the steel surface. Because the welded pipe is made by welding, it has obvious characteristics. Secondly, the diameter of welded pipe is generally large, and the diameter of seamless pipe and galvanized pipe is relatively small. Therefore, SA588 Gr A grade steel, welded pipe is generally used in underground pipeline to transport water, gas, air, oil and heating steam with low pressure.

The yield point of the steel structure determines the stress that the structure can withstand without permanent deformation. The minimum yield point of typical carbon structural steel is 235MPa. The minimum yield point of typical low-alloy high-strength steel is 345MPa. Therefore, according to the proportional relationship of its yield point, the use of low-alloy high-strength steel allows the stress to be 1.4 times higher than that of carbon structural steel. Compared with SA588 Gr A grade steel, carbon structural steel, the use of low-alloy high-strength steel can reduce the size of structural parts and reduce weight.

At present, the cutting thickness limit of laser cutting is 20 mm. However, it should be noted that oxygen will be added into the laser beam to cut 20 mm thick SA588 Gr A grade steel steel plate, which will form a thin oxide film on the cutting surface, which may affect the cutting quality, Therefore, attention should be paid to this point to avoid problems.

The strip steel thickness is generally below 6mm, which is convenient for crimping and processing. You should choose the SA588 Gr A grade steel, strip steel specifications according to your own purposes. The specifications and materials used for different purposes are different, so you must confirm it before buying. It is best to ask professionals to give advice before purchasing strip steel, and purchase the specifications and types you need according to the corresponding requirements.

After sales service support personnel pay attention to commitment in their work. In the process of people to people communication, mutual trust is an important factor for the long-term and stable communication. After sales service personnel must do what they say in the process of communication with customers.