Stainless steel seamless welded pipeHow to judge the quality

announcer:hp717HP127443542 release time:2021-11-02 15:50:08

2D cold rolled, heat treated, pickled or similar matt surface.

In conclusion, when calculating the approximate weight of stainless steel pipe and multiplying it by the unit price, the price of 6m stainless steel pipe can be roughly obtained, which can be used in the project budget.

.According to the purpose, it can be divided into oil well pipe (casing, oil pipe and drill pipe), pipeline pipe, boiler pipe, mechanical structure pipe, hydraulic prop pipe, gas cylinder pipe, geological pipe chemical pipe (high-pressure chemical fertilizer pipe, petroleum cracking pipe) and marine pipe.

400 series & mdash; Ferritic and martensitic stainless steel.

.Cold rolled oriented silicon steel strip (sheet) represents: 100 times of DQ + iron loss value (at the frequency of 50Hz the waveform is sinusoidal, and the magnetic induction peak value is the unit weight iron loss value of 7T) + 100 times of thickness value. Sometimes, G is added after the iron loss value to represent high magnetic induction. For example, dq133 represents cold rolled oriented silicon steel strip (sheet) with iron loss value of 3 and thickness of 0.3mm. Now the new model is 30q133.

Stainless steel pipes are not easy to rust as long as they are not in particularly polluted places. 201 stainless steel is easy to rust. These two can be tested with magnet. They are not magnetic and can not be absorbed by magnet.

When brown rust spots appear on the surface of stainless steel pipes, people will be surprised: & ldquo; Stainless steel pipes are not rusty. Is there a problem with the steel quality;. In fact, this is a one-sided wrong view because the understanding of stainless steel pipe is not comprehensive enough. You should know that stainless steel pipe will rust under certain conditions.

Stainless steel seamless welded pipeHow to judge the quality

The application of stainless steel pipe in the automobile industry is developing rapidly. In recent ten years, stainless steel pipe materials have been widely used in public transportation tools such as buses, subways, high-speed railway vehicles, household cars and so on!

Application: utility boiler industry, mainly in key parts such as high temperature section of superheater and reheater.

400 series & mdash; Ferritic and martensitic stainless steel.

Recommendation and consultation.The content of chromium, molybdenum and nitrogen in local corrosion-resistant duplex stainless steel makes it have strong ability to spot corrosion and interstitial corrosion in oxidizing and acidic solutions.

Japanese cold rolled non oriented silicon steel strip consists of nominal thickness (expanded by 100 times) + code a + iron loss guarantee value (the value after expanding the iron loss value when the frequency is 50Hz and the large magnetic flux density is 5T by 100 times). Provide various brand products such as stainless steel plate, stainless steel coil, stainless steel belt and stainless steel pipe for a long time. The designated products are complete and the quality is guaranteed. For example, 50a470 means that the thickness is 0.5mm and the iron loss guarantee value is ≤ 7 cold rolled non oriented silicon steel strip.

The product ground by the grinding belt.

Stainless steel seamless welded pipeHow to judge the quality

  SPHC—& mdash; In the first place, s is the abbreviation of steel, P is the abbreviation of plate h is the abbreviation of hot heat, and C is the abbreviation of commercial. It generally represents hot-rolled steel plate and strip.

Highly recommended.L stainless steel pipe is also called 00Cr17Ni14Mo2 stainless steel pipe. 00Cr17Ni14Mo2 is an ultra-low carbon steel of 0Cr17Ni12Mo2. 00Cr17Ni14Mo2 has better intergranular corrosion resistance than 0cr17ni14mo2. It is usually used to manufacture industrial equipment such as chemical industry, chemical fertilizer and chemical fiber, such as containers, pipelines and structural parts.

Rockwell hardness the Rockwell hardness test of stainless steel pipe is the same as Brinell hardness test. The difference is that it measures the depth of indentation. Rockwell hardness test is widely used at present, and HRC is second only to Brinell hardness Hb in steel pipe standards. Rockwell hardness can be used to measure metal materials from very soft to very hard, which makes up for the disadvantage of Brinell method, It is simpler than Brinell method and can read the hardness value directly from the dial of the hardness machine. However, due to its small indentation, equivalent to China 08Al (1323) high quality carbon structural steel.

.Mechanical properties when the steel or sample is stretched, when the stress exceeds the limit, even if the stress is no longer increased, the steel or sample continues to have obvious plastic deformation, and the small stress value when the yield phenomenon occurs is the yield point.

Origin: domestic and imported (Sweden, Japan, Finland, South Korea, South Africa and Taiwan); classified according to the thickness of thin plate (0.2mm-4mm), thick plate (20mm-60mm) and extra thick plate, according to the production of hot-rolled steel plate and cold-rolled steel

Difference between L stainless steel pipe and stainless steel pipe: and L stainless steel are molybdenum containing stainless steel. The molybdenum content of L stainless steel is slightly higher than that of stainless steel. Due to the molybdenum in the steel, the overall performance of this steel is better than that of and stainless steel. Stainless steel has a wide range of applications under high temperature conditions when the concentration of is lower than 15% and higher than 85%. In addition, stainless steel also has good chloride corrosion performance, so it is usually used in marine environment. The large carbon content of L stainless steel is 0.0, which can be used in applications where annealing cannot be carried out after welding and great corrosion resistance is required.