Compared with austenitic stainless steel, the weakness of the duplex stainless steel is as follows:1) application of universality and multifaceted tha...
Compared with austenitic stainless steel, the weakness of the duplex stainless steel is as follows:1) application of universality and multifaceted than austenitic stainless steel, such as its temperature must be controlled below 250 degrees Celsius.2) the plastic toughness was lower than those of austenitic stainless steel, cold and hot working process and mechanical properties than austenitic stainless steel.3) exist in the brittleness temperature zone, heat treatment and welding process system, must be strictly controlled in order to avoid the occurrence of harmful phase, damage performance. Compared with the ferritic stainless steel, the advantage of duplex stainless steel is as follows:1) comprehensive mechanical properties are better than ferritic stainless steel, plastic toughness, in particular, is not sensitive to brittle like ferritic stainless steel.2) in addition to the stress corrosion resistance, other local corrosion resistance are better than ferritic stainless steel.3) cold working technology and cold forming performance is far better than that of ferritic stainless steel.4) also far better than that of ferritic stainless steel welding performance, generally do not need to preheat before welding and without heat treatment after welding.5) application scope than ferritic stainless steel wide.
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Difference of PSL1 and PSL2(API 5L)
The API 5L has two standards, PSL1 and PSL2, which are very different from each other. I'll talk more about the differences between PSL1 and PSL2.
Production Process of Pipe Fitting
There are many kinds of processing methods for pipe fittings.
The Future of Steel Pipe Development
The future of steel pipe development is looking promising, according to expert analysis and data. The price of carbon steel pipe is predicted to bounce back this year, with China leading the way in increasing steel consumption demands. This is due to a series of government initiatives aimed at stimulating domestic demand, including the construction of affordable housing and infrastructure projects. The demand for structural steel pipe is also on the rise, thanks to state investment in housing and engineering projects. With private investment projects also gaining popularity, the steel pipe market is set to thrive in 2017.
