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ASTM A312 S31254 Duplex Stainless Steel Pipes For Offshore

ASTM A312 S31254 Duplex Stainless Steel Pipes For Offshore

    • ASTM A312 S31254 Duplex Stainless Steel Pipes For Offshore
    • ASTM A312 S31254 Duplex Stainless Steel Pipes For Offshore
    • ASTM A312 S31254 Duplex Stainless Steel Pipes For Offshore
    • ASTM A312 S31254 Duplex Stainless Steel Pipes For Offshore
  • ASTM A312 S31254 Duplex Stainless Steel Pipes For Offshore

    제품 상세 정보:

    원래 장소: 중국
    브랜드 이름: YUHONG
    인증: ABS, BV, ISO, ASTM, SGS
    모델 번호: 254 SMo,1.4547, UNS 31254, 1.4529, Z1 CNDU 20.18.06AZ

    결제 및 배송 조건:

    최소 주문 수량: 30kgs
    가격: Negotiable
    포장 세부 사항: 층 나무로 된 상자 포장.
    배달 시간: 20 일
    공급 능력: KGS, PC, M, 톤
    접촉
    상세 제품 설명
    재료: 254 SMo,1.4547, UNS 31254, 1.4529, Z1 CNDU 20.18.06AZ 시험: 와류 시험, 수압시험, 으뜸음, PT
    상술: ASTM A269, A213, A312, NFA 49-217, EN 10216-5 적용: 화학 산업, 열교환기, 보일러, 근해이, 플랫폼, 해저입니다
    노르속: 노르속 MDS R11/R18, IOGP S-563 MDS IR111/111S/IR118/IR118S
    하이 라이트:

    ASTM A312 Duplex Stainless Steel Pipes

    ,

    S31254 Duplex Stainless Steel Pipes

    ,

    S31254 Stainless Steel Seamless Pipe

    ASTM A312 S31254 Stainless Steel Seamless Pipe , offshore and platform application

     

    254 SMO is a high-alloy austenitic stainless steel developed for use in seawater and other aggressive chloride-bearing media. The steel is characterized by the following properties:

     

    • A.Excellent resistance to pitting and crevice corrosion, PRE = ≥42.5%
    • B.High resistance to general corrosion
    • C.High resistance to stress corrosion cracking
    • D.Higher strength than conventional austenitic stainless steels
    • E.Good weldability

    The PRE is defined as, in weight of content %, PRE = Cr % + 3.3 x Mo % + 16 x N %

     

     

          Standards

    • UNS: S31254
    • EN Number: 1.4547
    • EN Name: X1CrNiMoCuN20-18-7
    • W.Nr.: 1.4529
    • SS: 2378
    • AFNOR: Z1 CNDU 20.18.06AZ

      Product standards
    • Seamless tube and pipe: ASTM A269, A213, A312, NFA 49-217, EN 10216-5
    • Norsok MDS R11/R18, IOGP S-563 MDS IR111/111S/IR118/IR118S
    • Welded tube and pipe: ASTM A249, A269 , A312, A358, A409
    • Fittings: ASTM A182
    • Bar: ASTM A276, A479, EN 10088-3
    • Forged products: ASTM A473
    Chemical composition (nominal) %
    C Si Mn P S Cr Ni Mo N Cu
    ≤0.020 ≤0.80 ≤1.00 ≤0.030 ≤0.010 20 18 6.1 0.20 0.7

    254 SMO  Applications:

    • 1. Equipment for handling of seawater, such as, seawater cooling, cooling water pipes, ballast water systems, firefighting systems etc.
    • 2. Hydraulic and instrumention tubing
    • 3. Equipment in pulp bleaching plants
    • 4. Components in gas cleaning systems
    • 5. Tanks and pipelines for chemicals with high halide contents
    Stress corrosion cracking tests in boiling 25% NaCl solution, pH=1.5. U-bend specimens.
    ASTM TP316
    <150 h
    Pitting
    '904L'
    No failure (1000 h)
    Crevice corrosion
    Sandvik 254 SMO
    No failure (1000 h)
    No attack
    Grade Time to failure hours
    Stress corrosion cracking tests. Drop evaporation method*. Stress: 0.9xRp0.2
    ASTM TP316
    105
    TP904L
    225
    254 SMO
    425

    Intergranular corrosion

    254 SMO has a very low carbon content. This means that there is very little risk of carbide precipitation during heating, for example when welding. The steel passes the Strauss test (ASTM A262, practice E) even after sensitizing for one hour at 600–1000°C (1110–1830°F).

    However, due to the high alloying content of the steel, inter-metallic phases can precipitate at the grain boundaries in the temperature range 600–1000°C (1110–1830°F). These precipitations do not involve any risk of intergranular corrosion in the environments in which the steel is intended to be used. Thus, welding can be carried out without any risk of intergranular corrosion.

    Pitting corrosion

    The pitting and crevice corrosion resistance of stainless steel is primarily determined by the content of chromium, molybdenum and nitrogen. Manufacture and fabrication, e.g. welding, are also of vital importance for the actual performance in service. A parameter for comparing the resistance to pitting in chloride environments is the PRE number (Pitting Resistance Equivalent). The PRE is defined as, in weight-%, PRE = %Cr + 3.3 x %Mo + 16 x %N

    Heat Treatment
    The tubes are delivered in heat treated condition. If additional heat treatment is needed due to further processing the following is recommended.
    Solution annealing 1150–1200°C (2100–2190°F), quenching in water. Thin-walled tubes min. 1130°C (2060°F), quenching in air/water.

    Mechanical Properties
     
    Wall thickness Proof strength Tensile strength Elong. Hardness
      Rp0.2a) Rp1.0a) Rm Ab) A2" HRB
    mm MPa MPa MPa % %  
    Metric units, at 20°C
    <5 ≥310 ≥340 675-850 ≥35 ≥35 ≤96
    >5 ≥310 ≥340 655-850 ≥35 ≥35 ≤96
    1 MPa = 1 N/mm2

     

    Wall thickness Proof strength Tensile strength Elong. Hardness
      Rp0.2a) Rp1.0a) Rm Ab) A2" HRB
    inch ksi ksi ksi % %  
    Imperial units, at 68°F
    <0.187 ≥45 ≥49 98-123 ≥35 ≥35 ≤96
    >0.187 ≥45 ≥49 98-123 ≥35 ≥35 ≤96

    a) Rp0.2 and Rp1.0 correspond to 0.2% offset and 1.0% offset yield strength, respectively.
    b) Based on L0 = 5.65 √S0 where L0 is the original gauge length and S0 the original cross-section area.

     

    Weldding:

    Recommended filler metals

    TIG/GTAW or MIG/GMAW welding
    ISO 18274 S Ni 6625/AWS A5.14 ERNiCrMo-3 (e.g. Exaton Ni60)
    ISO 18274 S Ni 6059/AWS A5.14 ERNiCrMo-13 (e.g. Exaton Ni59)

    MMA/SMAW welding
    ISO 14172 E Ni 6625/AWS A5.11 ENiCrMo-3 (e.g. Exaton Ni60)
    ISO 14172 E Ni 6059/AWS A5.11 ENiCrMo-13 (e.g. Exaton Ni59)

    ASTM A312 S31254 Duplex Stainless Steel Pipes For Offshore 0

     

     

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