What is the difference between a duplex and a super duplex?

by Maria Smith February 4, 2023

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Super Duplex stainless steels have carbon, manganese, silicon, phosphorus, sulfur, 24% chromium, 3% molybdenum, 6% nickel, nitrogen, and iron in the composition. On the other hand, duplex stainless steels are based around an alloying addition of 22% chromium. The level of chromium in the composition is important because the increase of chromium also increases pitting corrosion resistance. Duplex Stainless Steel is called Duplex because it is a mixture of duel phases. Its metallurgical structure consists of austenitic (face-covered cubic lattice as well as ferrite (body-centered cubic lattice).

Does a super duplex round bar rust?

As discussed above, Super Duplex Round Bar has a good amount of chromium content so they have good corrosion resistance. Therefore, Super Duplex Round Bars are prevented from rusting. They are used in environments where a lot of outdoor exposure is required and in various factories and industries. They have a high demand all over the world and provide good machinability, weldability, and workability.

Is a super duplex 2507 round bar magnetic?

Super duplex steel has a mixture of austenitic and ferritic grains within its microstructure. Even though austenitic microstructures are non-magnetic, ferritic microstructures have properties of magnetism in themselves. Therefore, Super Duplex 2507 Round Bars are also considered magnetic.

How strong is the 2507 round bar?

Super Duplex Steel Is known for high strength and high corrosion resistance with austenitic and ferritic qualities. Different categories of such steel include standard duplex, lean duplex, and the Super Duplex 2507 Round Bar types. It has high fatigue strength. The material has a 1350 degrees Celsius melting point and 550MPa minimum yield strength and 800MPa minimum tensile strength. Duplex Steel is used in construction industries, bridges, petrochemical industries, engineering applications, and in shipbuilding applications.

What is Saudi Arabia’s import tax on the super duplex bar?

Countries meet their demands with the help of trading materials from different countries. The import and export business is done after the imposition of taxes on the products. All countries whether for imports or exports have to go through this taxation along with other things. For Saudi Arabia, there has been a recent increase in import tariffs. Saudi Arabia has increased import duties on various semi-finished and finished iron and steel products to between 10% and 20% of the product value. Earlier it was only  5% to 10% of the product value depending on product specifications.

To import, the 2507 round bar suppliers should be registered or licensed or get a permit from the Ministry of Commerce and Investment (MCI). Saudi Arabian Department of Customs (SADC) is the authority that regulates the inflow and outflow of goods in the country. Every good that is to be imported into Saudi Arabia needs to have a SASO Certificate of Saudi Arabia.

Why is India more expensive than China to manufacture a super duplex hollow bar?

China comes under one of the cheapest manufacturers in the world. With the abundance of Chinese products in our local markets we can see China extravagantly sells its products at unthinkable low prices. China is also a developed country with an abundance of factories and manufacturers which makes one of the reasons for its cheap and efficient manufacturing of products even steel products. It has more than 50% of the world’s steel products and that does say something.

The manufacturing rate in India is generally higher than the manufacturing costs in China as we all have noticed in our day-to-day life. The major reasons include the fact that India is a developing country leading to issues like lack of power availability, higher power costs, cost of labor, cost of transportation, and lack of large enterprises. However, with recent reports of 2022, India has topped the list of the cheapest manufacturers going ahead of China and Vietnam. For steel products such as super duplex hollow bars, India is still considered more expensive than China in manufacturing but the quality of the products is definitely higher. India’s manufacturing costs are still considered better in the country because people tend to trust made-in-India products a lot more than Chinese ones. 

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