321 Polished Welded Seamless Stainless Steel Pipe Tube ASTM A269 Tube

With excellent mechanical properties, corrosion resistance, and good weldability, it has a wide range of uses in the oil and gas industry, marine engineering, chemical industry and other industries. The length of the oil and gas pipelines laid by duplex stainless steel in the oil and natural gas industry has exceeded 850Km, most of which are 2205 duplex stainless steel seamless steel pipes (some of them are S31803 duplex stainless steel pipes and 2507 duplex stainless steel pipes); West-East Gas Pipeline Due to the strong corrosiveness of the natural gas medium in the project, the high-pressure pipelines are all made of 2205 duplex stainless steel.
321 austenitic stainless steel has good corrosion resistance in the atmosphere and is widely used in petrochemical, electric power, bridge and automobile industries [1]. However, the "stainlessness" of stainless steel is not absolute. Due to the special service environment, stainless steel will also corrode. Factors such as medium concentration, pH value, and temperature will have a greater impact on the corrosion resistance of stainless steel. For example, long-term use within the sensitization temperature range of 450 to 850°C will cause intergranular corrosion of stainless steel. The mechanism is that C combines with Cr at the grain boundary to form Cr23C6 and precipitate, which reduces the Cr content at the grain boundary. This is the so-called "chromium depletion". The Cr element is one of the main elements that inhibit intergranular corrosion. When the Cr content at the grain boundary is less than 12%, the probability of intergranular corrosion will increase.

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FAQ:

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Q1. What are your company's main products?
A1: Our main products include: Stainless Steel Sheet, Stainless Steel Plate, Stainless Steel Coil, Stainless Steel Pipe, Stainless Steel Bar, etc.

Q2. How do you control quality?
A2: Mill Test Certification is supplied with shipment, Third Party Inspection is available. and we also get ISO, SGS, Alibaba Verified.

Q3. What are the advantages of your company?
A3: We have specialized in the steel business for years, so we have mature production technology, stable capacity, more competitive prices,
we are dedicated to strict quality control and thoughtful customer service.

Q4. Can you provide a sample?
A4: We can provide the same samples in stock for free, as long as you contact us.

About us:

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Wuxi Wilke Metal Materials Co., Ltd. is a leading supplier of high-quality stainless steel materials. Established in 2012 in Wuxi, China, the company has quickly become a reputable and reliable supplier of metal materials to customers around the world.

At Wuxi Wilke Metal Materials Co., Ltd., we pride ourselves on providing superior quality products that meet international standards. Our products are sourced from reputable manufacturers who have a proven track record of delivering high-quality materials. We have established long-term relationships with these manufacturers, which enables us to offer our customers competitive prices and consistent product quality.