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  The difference between 304 and 316 stainless steel is very commonly misunderstood, or not known at all, and can have a huge impact on the reliability of survey results, and what you’re achieving for your clients. Let’s explore this further. 304 stainless steel contains a mix of chromium and nickel and is slightly responsive to magnetic fields. The addition of the nickel (8-10.5%) modifies the physical structure of the steel and then, theoretically, makes it non-magnetic. However, through extended periods of continuous motion in one direction, and the resulting friction, grade 304 stainless steel can become slightly more magnetic. Additionally, if the steel alloy is mechanically deformed during the manufacturing process the internal structure of the steel may change causing the rods to be partly magnetic from the moment they leave your supplier’s warehouse. They haven’t even seen pay dirt yet. On the other hand, 316 type stainless steel is a molybdenum-alloyed steel and contains a...

 As with all corrosion-resistant alloys, 2205 duplex stainless steel can suffer corrosion when exposed to suitably corrosive conditions. As they contain a higher chromium content than standard 304/316 grades, their Pitting Resistance Equivalent Number (PREN) is higher, indicating increased resistance to pitting corrosion. For instance, the PREN for a duplex stainless steel (Sanmac 2205, SAF2205, 1.4462, F51/F60, S31803, S32205) is 34, whilst that for Alloy 316L (1.4404, S31603) is only 25. Therefore, an appreciable increase in resistance to pitting corrosion can be expected. Anbao Group  is a experienced manufacturer of  stainless steel pipe flanges ,carbon steel tubes,alloy steel tubes, 304/316 stainless steel tubes  ,stainless steel  304/316 round bars , duplex 2205 tubes & bars ,metal casting,forging and precision investment machining which means we can handle all your needs.We are professional casting parts OEM/ODM manufacture and supplier in china.Anbao...

  COMMONLY USED BASIC FLANGES The most common and best flange types widely used for many purposes and in many sites are welding neck, slip-on, socket weld, lap joint, threaded, and blind flange. Welding Neck Flange These Flanges are very simple and easy to manage compared to proprietary connections. Their workability is superior, and they are the best design for high-stress service. The welding neck covers the thickness of a wall typically and pipes adjoining with them. The structure of these flanges is explicitly made to work with high pressure and elevated temperature. Some designs contribute a significant part in the smooth transition of pipes’ pressure, depending upon the welding neck flange’s integrity relative to the application. A small projection of the neck from the base is an obvious characteristic in their structure which helps in the strong bonding with the joint, and ultimately pressure of the liquid will flow smoothly according to the design. Certain things like the q...

  An austenitic-ferritic stainless variant with a higher stress corrosion cracking resistance in comparison to regular austenitic 304 and 316 stainless, but with a lower toughness and impact strength. This category of material includes grades 2205, F51, F53, and F60. Duplex stainless has increased in popularity over the years due to its excellent chemical and mechanical properties versus their basic stainless counterparts, given especially that the cost differences are minimal now as the availability has increased. offers a wide range of Duplex Steel Flange, which has some excellent features to offer such as Lightweight, Tough construction, Dimensionally accurate, and so on. We also offer these products in different grades such as S32205 Duplex Flanges, S31803 Duplex Flanges, Super Duplex 2507 Flanges, and  S32750  Super Duplex Flanges. We have emerged in offering our valuable customers a wide array of our  Duplex Steel Slip On Flanges , where we also offer the same ...

  2205 duplex stainless steel is a cost effective solution for many applications where the 300 series stainless steels are susceptible to chloride stress corrosion cracking. Stress corrosion cracking occurs when stainless steels are subjected to tensile stress, while in contact with solutions containing chlorides. Increasing temperatures also increase the susceptibility of stainless steels to stress corrosion cracking.We have wide range of sizes in our stock of  2205 Duplex Stainless Steel Pipe  & 2507 Super Duplex Stainless Steel tube,S31803 Welded Pipes Tubes . 2205 steel has excellent corrosion resistance and is superior to grade 316, performing well in most environments where standard austenitic grades may fail. 2205’s low carbon content gives the grade a high resistance to intergranular corrosion and has better resistance to uniform, pitting and crevice corrosion due to its high chromium and molybdenum content.  As 2205 is a duplex stainless steel, the grade...

  Duplex UNS S31803/ S32205   are the most common duplex grades in the market. They have very good resistance to localized corrosion and stress corrosion cracking in combination with high mechanical strength. UNS numbers S31803 and S32205 represent alloys with more characteristics in common than distinct differences. Firstly, they are both stainless steels with similar elemental compositions. Both S31803 and S32205 belong to the duplex 2205 family, which means they comprise almost equal parts austenite and ferrite. Secondly, they are both extremely strong and durable alloys.They are widely used in oil & gas, hydro power, pressure vessels, pulp & paper, structural components and chemical tankers. The alloys are not intended to be used at temperatures above 300°C due to embrittlement. APPLICATIONS The main applications are for details with special requirements for high corrosion resistance. S31803/ S32205 are characterized by: • High resistance to stress corrosion cracki...

 Duplex stainless steel tubing is characterised by high chromium (19–28%) and molybdenum (up to 5%) and lower nickel contents than austenitic stainless steels. The most used duplex stainless steels are the 2205 (22% Chromium, 5% Nickel) and the 2507 (25% Chromium, 7% Nickel); 2507 is known as “super duplex” due to its higher resistance to corrosion.To improve the performance of your industrial process heat exchanger, we always use duplex stainless steel tubing . Heat exchangers are key components for many industries, particularly in chemical and oil and gas plants where they play a vital role in process control. Industry professionals — from design engineers and fabricators to the in-plant operators who work with the equipment daily — seek new ways to improve heat transfer performance and extend the life of these units in corrosive environments. Many times, improvements are closely related to the tubing specified for use in their heat exchangers. To improve the performance of ...