Download as PDF. SAF™ 2507 is a super-duplex (austenitic-ferritic) stainless steel for service in highly corrosive conditions. The grade is characterized by: Excellent resistance to stress corrosion cracking (SCC) in chloride-bearing environments. Excellent resistance to pitting and crevice corrosion.

• Sieurin H., Sandström R., Austenite reformation in the heat-affected zone of duplex stainless steel 2205, Materials Science and Engineering A, Volume 418, Issues 1-2, February 2006, Pages 250-256. • Sieurin H., Sandström R., Sigma phase precipitation in duplex stainless steel 2205, submitted to Materials Science and Engineering A, 2006.

The corrosion behavior and passivation mechanism of S32750 super-duplex stainless steel exposed in a simulated marine atmosphere were studied using electrochemical methods, XPS and SEM. Passivation and local corrosion occurred on the metal surface when S32750 SDSS was exposed in the simulated marine atmospheric …

0,20,250,3 0,35 0,40,450,5 ... (Sandvik SAF 3207 HD) as well as super duplex stainless steel grade UNS S32750 (Sandvik SAF 2507). Sandvik SAF 3207 HD contains the highest amounts of the alloying elements. The nitrogen content is up to 0.5%. * Minimum PRE value for tube material.

There are several grades of super duplex stainless steel. The most common super duplex grades are 2507 and Z100. Other super duplex steels include …

General Properties. Duplex 2507 (UNS S32750) is a super duplex stainless steel with 25% chromium, 4% molybdenum, and 7% nickel designed for demanding applications …

arise into austenitic stainless-steel in harsh and corrosive environments. Wider application of DSS is noted in oil and gas industries due to the favourable arrangement of strength and corrosion resistance [6, 7]. In most of the applications, the duplex stainless steels need to undergo welding process while joining two parts together.

This paper presents an overview of duplex stainless steels (DSS) with particular emphasis on super DSS, i.e. steels containing sufficient amounts of chromium, molybdenum, and nitrogen to produce a ...

Super duplex stainless steel (SDSS) is a candidate material for production tubing in oil and gas wells and subsea pipelines used to transport corrosive hydrocarbon fluids. The suitability of this material for high temperature applications is examined in this article. The uniaxial tensile properties are determined for a 25Cr SDSS over a range of …

Super duplex and duplex stainless steels both have the same three metals in common, these metals are present at different levels. Duplex consists of 22% chromium, 5-6% nickel and 3% molybdenum. Super …

Duplex stainless steels are becoming more common. They are being offered by all the major stainless steel mills for a number of reasons: Higher strength leading to weight saving. Greater corrosion resistance particularly to stress corrosion cracking. Better price stability. Lower price. There is a conference on the subject of duplex every 2-3 ...

فولاد داپلکس چیست؟ ... (super duplex stainless steel) در ترکیب شیمیایی استیل سوپر داپلکس، می‌توان مقدار کروم را تا ۳۰ درصد، نیکل را تا ۸ و مولیبدن را تا ۵ درصد افزایش داد. در این دسته آلیاژی، از مس، نیتروژن و ...

The duplex family of stainless steels offer a wide range of pitting and crevice corrosion resistance from the lean duplex grades with resistance that approaches Type 316L …

The continuous development of duplex stainless steels (DSSs) is due to their excellent corrosion resistance in aggressive environments and their mechanical strength, which is usually twice of conventional austenitic stainless steels (ASSs). In this paper, a designed lean duplex stainless steel 2101, with the alloy design of reduced …

듀플렉스 스테인레스 스틸은(이하 듀플렉스 강) "두 부분으로 된다" 라는 Duplex 의 뜻. 그대로 이중의 구조를 가지고 있다. 외관적으로는 Ferrite 에 Austenite가 깊숙하게 박혀있고 구성비율은 1:1 에 가깝다. …

Superduplex stainless steels have a very high resistance to localized corrosion in chloride media, combined with a high mechanical strength. The series consists of three grades: …

The use of Super Duplex stainless steel components that do not meet the purchaser's specified requirements can have serious consequences. When discovered in the supply ... 1 EDM 0.0064 0.0284 0.250 ID Transverse 2 EDM 0.0062 0.0298 0.250 OD Transverse 3 EDM 0.0063 0.0294 0.250 OD Longitudinal 4 Hole Thru 0.031 0.031 ID/OD N/A ...

Super Duplex 25 Chrome, or 2507, are cold hardened duplex stainless steels defined by having a Pitting Resistance Equivalent Number (PREN) greater than 40. Compared to 22 …

Among the stainless steels, 2507 super duplex stainless steel (2507 SDSS) is known for its excellent combination of corrosion resistance and high strength. …

Duplex stainless steels are a group of widely used stainless steels, because of their attractive combination of strength and corrosion resistance. However, these steels embrittle because of a phase separation phenomenon in the ferrite phase when exposed to temperatures within the miscibility gap. This manuscript investigates the …

Duplex S31803 and Super Duplex S32750 Performance. Duplex S31803, also known as stainless steel grade 2205, is a standardized formulation that conforms to UNS specification regulations. Its temperature range is typically listed as -50° to 300° C (-58° to 572° F); outside of this range, its performance characteristics degrade.

Super duplex stainless steel (SDSS), with approximately equal fractions of ferrite (δ) and austenite (γ), exhibits excellent performance in highly corrosive environments as well as when high mechanical loads are present. ... The processing and/or application of SDSS is limited at temperatures between 250 °C and 1000 °C due to phase ...

Duplex 2507 stainless steel is a super duplex stainless steel containing low carbon (up to 0.03%), chromium (~25%), nickel (~7%), and molybdenum (~4%). …

range 250–500 C, decomposition of ferrite and embrittlement may occur after long-term exposure, inducing a decrease in toughness. At higher temperatures, various types of precipitates may form in ... Duplex stainless steel and super duplex stainless steels contain both austenite and ferrite phases. Eventually, expanded phases in austenite ...

for the Evaluation of Super Duplex Stainless Steel" and involves the applicability of ASTM A923 to the Cast Super Duplex materials. Volume 5 is the data package for the incorporation of ASTM A890-5A material into the ASTM A923. In volume 1 selected grades of Duplex Stainless Steel castings and their welds, in

Alloy 2507 Super Duplex Stainless Steel Stainless Steel. Duplex stainless steels have a two-phase microstructure of austenite and ferrite grains. This structure gives these materials a combination of attractive properties, including strength, ductility, and corrosion resistance. ... Applications up to 482°F (250°C) Higher thermal conductivity ...

@article{osti_861365, title = {Final Report, Volume 1, Metallurgical Evaluation of Cast Duplex Stainless Steels and their Weldments}, author = {Wen, Songqing and Lundin, Carl, W. and Batten, Greg, W.}, abstractNote = {Duplex stainless steels (DSS) are being specified for chloride containing environments due to their …

Duplex stainless steels present good corrosion resistant and mechanical properties hence they are being used in various pressure boundary components of nuclear power plants such as primary coolant pipes, valves and pump bodies because of the presence of the dual microstructure which consists of equal amounts of austenite and α …

ASTM A240 specification covers stainless steel plates, sheets and strips for pressure vessels and general applications. This specification covers chemical composition and mechanical properties for various grades of ferritic, austenitic, martensitic, duplex, super duplex and high moly stainless steel alloys. Boltport frequently uses sheets and ...

Stainless steel인 STS304,316에 비해 사용 빈도는 낮지만 특정 환경(염소 부식 환경)에서는 필수로 사용해야 하는 재질 중 하나입니다. ... Super Duplex. 25Cr – 7 Ni – 4Mo - N. 3. Duplex의 특징(물리화학적) 염소에 의한 부식환경에서 내식성이 뛰어나다. (STS316L≒2304<2205<2507)

250 400 420 640 500 57 61 92 25 Typical temperature range of use: - 50°C/+270°C (- 58°F/+518°F). For lower temperature applications, please ... SUGGESTED LIMITS FOR DUPLEX AND SUPER DUPLEX STAINLESS STEELS MR 01-75 LIMITS FOR 22 Cr AND 25 Cr DUPLEX Cracking Cracking No Cracking No Cracking Chloride mg/l 1 000 000 …

Sandvik SAF 2707 HD is a high alloy, hyper-duplex stainless steel developed to provide high chloride cor-rosion resistance, combined with improved mechanical properties. It is particularly suitable for use in aggres-sive, acidic, chloride-containing environments. Sandvik SAF 2507 ® Sandvik SAF 2507 is a high alloy super-duplex steel for

Duplex stainless steels are magnetic and are far more corrosion resistant than more commonly used stainless grades, i.e. 302 and 316. Super Duplex combines aspects of both austenitic and ferritic grades, and is known for its excellent corrosion resistance and high strength. Super Duplex is also known as Alloy 32750 and SAF 2507.