Duplex Super Duplex Percent (%) (minimum) Percent (%) (minimum) Nitrogen 0.14 0.2 Nickel 8.0 9.0 Molybdenum 3.0 3.5 Often times during fabrication there is a need for welded joints between DSS and other alloys, e.g., carbon steel, austenitic stainless steel, etc. these dissimilar welds always Duplex Stainless Steels - Rolled Alloys, Inc.ZERON ® 100. ZERON 100 - A highly alloyed super duplex stainless steel for use in seawater desalination and many aggressive environments. Minimum PREN of 40. For standards ISO 15156/NACE MR0175 and BS 4515-2 a different PREN formula including tungsten is used. Using the formula PREN = %Cr 3.3 (%Mo + 0.5x%W) + 16x%N, ZERON 100 has a PREN > 41.
We are offering a wide range of UNS S32750Super Duplex Stainless Steel.We have in store for our clients a sturdy range of pipes that are capacitated to withstand temperature variations and thus are used in heat transfer process equipment like boilers, super Duplex stainless steels-Complete Guide - Super Metals45 rows · For plate shapes, the thickness is up to 150 to 200 mm for Duplex stainless steel 2205 Ferrite Control in Duplex Stainless Steel Weld Metalduplex stainless steel weld metals by the addition of counterweights to a Magne Cage and extrapolation of the calibration line (Ref. 5). This extended ferrite number (EFN) system was shown in Ref. 5 to provide good laboratory-to-laboratory reproducibility on duplex stainless steel weld metals. Also in Ref. 5, it was shown, at least for
Key words:Duplex stainless steel, super-duplex stainless steel, welding, corrosion test, ferrite, austenite ABSTRACT For demanding offshore oil and gas applications, duplex (UNS S31803) and super duplex (UNS S32750 and UNS S32760) stainless steels provide excellent corrosion resistance and high mechanical strength. Reduce Pitting Corrosion when Welding Duplex Stainless Jan 08, 2015 · Therefore, to reduce the risk of impaired mechanical and corrosion properties when welding Duplex Stainless Steel pipes, always use a consumable that is over-alloyed in nickel compared to the parent material. Also, make sure that you have the right heat input since that affects the cooling rate and the formation of secondary austenite. Technical Data & Welding Guidelines for Ferralium General FERRALIUM ® 255-SD50 super duplex stainless steel is the latest refinement of FERRALIUM ®, possessing higher strength and an improved corrosion resistance when compared to the other commercial super duplex grades. FERRALIUM ® 255-SD50 is used extensively in the Offshore Oil & Gas Industry and Chemical Industry, where high levels of strength, corrosion and wear resistance are
when repairing. At tube to tube sheet welding, use the TIG process and Ar + 3% N2 as the shielding gas. TIG is strongly recommended for root passes in one-sided welding. Generally, when joining duplex stainless steel to other types of material, a duplex filler metal is recommended. For welding Duplex Stainless Steels Welding GuidelinesAs a general rule, the interpass temperature should be limited to 150°C (300°F) for lean duplex and duplex steels, and 100°C (210°F) for super-duplex steels. Too high interpass temperatures will decrease the cooling rate. In this case, intermetallic phase, nitrides or