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UNS 32750 Super Duplex Stainless Steel Pipes and Tubes
Super Duplex Stainless Steel is a highly alloyed, good performance Duplex steel with a pitting resistance. Super Duplex offers good resistance to pitting and crevice corrosion. Super Duplex is suited for use in aggressive environments. Super Duplex Stainless has good resistance to stress corrosion cracking in chloride and sour environments. Super Duplex has good resistance to erosion corrosion and corrosion fatigue.
Super Duplex stainless like Duplex, is a mixed microstructure of austenite and ferrite (50/50) which has improved strength over ferritic and austenitic steel grades. The main difference is that Super duplex has a higher Molybdenum and Chromium content which gives the material greater corrosion resistance.
Stainless Steel Super Duplex 2507 is designed for applications which demand exceptional strength and corrosion resistance. The high molybdenum, chromium and nitrogen content in Super Duplex 2507 results in excellent resistance to chloride pitting and crevice corrosion attack and the duplex structure provides Super Duplex 2507 with exceptional resistance to chloride stress corrosion cracking. Usage of Super Duplex Steel 2507 should be limited to applications below 600° F (316° C). Extended elevated temperature exposure can reduce both the toughness and corrosion resistance of Alloy 2507.
Super Duplex has the same benefits as its counterpart - it has lower production costs when compared with similar ferritic and austenitic grades and due to the materials increased tensile and yield strength, in many cases this gives the purchaser the welcomed option of purchasing smaller thicknesses without the need to compromise on quality and performance.
Benefits of UNS32750 Super Duplex Stainless Steel
Improved corrosion resistance in comparison to Duplex
Greater tensile and yield strength
Good ductility and toughness
Good stress corrosion cracking resistance (SSC)
Opportunity for purchases to reduce their material costs without compromising on quality
Corrosion Resistance
General Corrosion
The high chromium and molybdenum content of 2507 makes it extremely resistant to uniform corrosion by organic acids like formic and acetic acid. 2507 also provides excellent resistance to inorganic acids, especially those containing chlorides.
In dilute sulfuric acid contaminated with chloride ions, 2507 has better corrosion resistance than 904L, which is a highly alloyed austenitic steel grade specially designed to resist pure sulfuric acid.
Stainless steel of type 316L (2.5%Mo) cannot be used in hydrochloric acid due to the risk of localized and uniform corrosion. However, 2507 can be used in dilute hydrochloric acid. Pitting need not be a risk in the zone below the borderline in this figure, but crevices must be avoided.
Isocorrosion curves, 0.1 mm/year, in sulfuric acid
With an addition of 2000 ppm chloride ions
Isocorrosion curves, 0.1 mm/year, in hydrochloric acid.
Broken line curve represents the boiling point
Critical Pitting Temperature (CPT) range for
Various alloys in 1M NACl
Critical Crevice Corrosion Temperature (CCT)
For various alloys in 10% FeCl3
Intergranural Corrosion
2507's low carbon content greatly lowers the risk of carbide precipitation at the grain boundaries during heat treatment; Therefore, the alloy is highly resistant to carbide-related intergranular corrosion.
Stress Corrosion Cracking
The duplex structure of 2507 provides excellent resistance to chloride stress corrosion cracking (SCC). Because of its higher alloy content, 2507 is superior to 2205 in corrosion resistance and strength. 2507 is especially useful in offshore oil and gas applications and in wells with either naturally high brine levels or where brine has been injected to enhance recovery.
Chemical Analysis
Typical values (Weight %)
주소:
Huaye Road No. 36, Dongbang Industrial Park of Changshu City, Suzhou, Jiangsu, China
사업 유형:
제조사/공장
사업 범위:
건축과 장식재료, 야금광산물과 에너지, 자동차와 오토바이와 액세서리, 제조 가공 기계
경영시스템 인증:
HSE, ISO 9001
회사소개:
Suzhou Golden-way Steel Tube Co., Ltd는 1992년에 설립되었으며 심리스 스테인리스 스틸 튜브 및 파이프를 제조하는 데 특화된 회사입니다. 2006년 다른 강관 사업장과 구조조정을 거쳐 합병을 한 후, 우리 회사는 현재 연간 6,000MT 용량을 보유하고 있습니다.
첨단 기업인 쑤저우 골든 웨이는 핫 피어싱, 콜드 드형, 콜드 롤링 등 스테인리스 스틸 무봉제 제품의 완벽한 제조 시스템을 갖추고 있습니다. 주요 제조 기계에는 냉연 기계가 포함되며
쑤저우 골드 웨이는 엄격한 품질 관리 시스템을 갖추고 있습니다. 생산 과정에서 우리는 전체 공정 품질 관리 ISO 9001:2008을 따르고 각 절차에서 재료를 검사합니다. 이 엄격한 관리를 통해 우리는 특수 장비 제조 라이센스, CQC 인증서, PED 인증서 및 다양한 조선 증명서 등의 다양한 인증서를 얻을 수 있습니다. 또한 EPC 회사와 최종 사용자 모두 자격을 갖추고 있습니다.
우리는 고품질, 높은 요구 사항 및 높은 서비스를 위해 노력하고 있습니다.