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Zhejiang Yuhongwell Steel Co.,Ltd

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Home ProductsDuplex Stainless Steel Pipes

Duplex Stainless Steel Pipe,Alloy 2507 Super Duplex Stainless Steel Pipes / Tubes ASTM / ASME A / SA789 A/SA790 A/SA928

Duplex Stainless Steel Pipe,Alloy 2507 Super Duplex Stainless Steel Pipes / Tubes ASTM / ASME A / SA789 A/SA790 A/SA928

    • Duplex Stainless Steel Pipe,Alloy 2507 Super Duplex Stainless Steel Pipes / Tubes ASTM / ASME A / SA789 A/SA790 A/SA928
    • Duplex Stainless Steel Pipe,Alloy 2507 Super Duplex Stainless Steel Pipes / Tubes ASTM / ASME A / SA789 A/SA790 A/SA928
    • Duplex Stainless Steel Pipe,Alloy 2507 Super Duplex Stainless Steel Pipes / Tubes ASTM / ASME A / SA789 A/SA790 A/SA928
    • Duplex Stainless Steel Pipe,Alloy 2507 Super Duplex Stainless Steel Pipes / Tubes ASTM / ASME A / SA789 A/SA790 A/SA928
    • Duplex Stainless Steel Pipe,Alloy 2507 Super Duplex Stainless Steel Pipes / Tubes ASTM / ASME A / SA789 A/SA790 A/SA928
    • Duplex Stainless Steel Pipe,Alloy 2507 Super Duplex Stainless Steel Pipes / Tubes ASTM / ASME A / SA789 A/SA790 A/SA928
  • Duplex Stainless Steel Pipe,Alloy 2507 Super Duplex Stainless Steel Pipes / Tubes ASTM / ASME A / SA789 A/SA790 A/SA928

    Product Details:

    Place of Origin: China,USA, Korea, UE
    Brand Name: YUHONG SPECIAL STEEL
    Certification: ABS, LR, GL, DNV, NK, TS, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008
    Model Number: ASTM / ASME A / SA789 A/SA790 A/ SA928 / A999

    Payment & Shipping Terms:

    Minimum Order Quantity: 100KGS
    Price: negotiable
    Packaging Details: Ply-wooden Case /Iron Case/ Bundle with plastic Cap
    Delivery Time: 10days->
    Payment Terms: T/T, L/C
    Supply Ability: 1500 tons per month
    Contact Now
    Detailed Product Description

    Duplex Stainless Steel Pipe,Alloy 2507 Super Duplex Stainless Steel Pipes / Tubes ASTM / ASME A / SA789 A/SA790 A/SA928

     

    YUHONG SPECIAL STEEL deal with  Austenitic Stainless Steel, Nickel Alloy Steel(Hastelloy , Monel, Inconel, Incoloy ) seamless  and welded  pipe and tube already more than 25 years, every year sell more than 80000 tons of steel  pipe and tube. Our client already cover more than 45 countries, Like Italy, UK, Gernmany, USA, Canada, Chile, Colombia, Saudi Arabia, Russia, Korea, Singapore, Austrial, Poland, France , ....And our group branch company and factory have been already approved by :ABS, DNV, GL, BV, PED 97/23/EC, AD2000-WO, GOST9941-81, CCS, TS, CNNC, ISO9001-2008, ISO 14001-2004. 

     

    U Bend Duplex Tube

    Duplex Stainless Steel Pipe,Alloy 2507 Super Duplex Stainless Steel Pipes / Tubes ASTM / ASME A / SA789 A/SA790 A/SA928

    U Bend Duplex Tube

    Standard: ASTM/ASME A/SA789, A/SA790, A/SA928, DIN17456/17458, EN10216-5. After negotiation, we can supply

    pipe with customers'requirement.

    Material Grade:

    UNS

    EN

    DIN

    C %

    Cr%

    Ni%

    Mo%

    N%

    Other %

    S31803

    1.4462

    X2CrNiMoN22-5-3

    0.030max

    21.0-23.0

    4.5-6.5

    2.5-3.5

    0.08-0.20

    /

    S32205

    1.4462

    X2CrNiMoN22-5-3

    0.030max

    22.0-23.0

    4.5-6.5

    3.0-3.5

    0.14-0.20

    /

    S32101

    1.4162

     

    0.040max

    21.0-22.0

    1.35-1.70

    0.10-0.80

    0.20-0.25

    Cu 0.10-0.80

    S32304

     

     

    0.030max

    21.5-24.5

    3.0-5.5

    0.05-0.60

    0.15-0.20

    Cu 0.05-0.60

    S32750

    1.4410

    X2CrNiMoN25-7-4

    0.030max

    24.0-26.0

    6.0-8.0

    3.0-5.0

    0.24-0.32

    Cu 0.50max

    S32760

     

     

    0.050max

    24.0-26.0

    6.0-8.0

    3.0-4.0

    0.20-0.30

    Cu 0.50-1.00

     

     

    Mechanical  Property:

     

    UNS

    Tensile Strength 
     Min, Mpa

    Yield Strength 
    Min, Mpa

    Elongation in 2 in Or 50mm  Min, %

    Hardness Max, 
    HRC

    S31803

    620

    450

    25

    30

    S32205

    655

    485

    25

    30

    S32101

    700

    530

    30

    30

    S32304

    690

    450

    25

    30

    S32750

    800

    550

    15

    32

    S32760

    750

    550

    25

    32

     

     

    Size Range:

     

    Stainless Steel Seamless Tube

    ASTM A789/A789M: OD: Φ12.7mm-Φ203mm; WT:0.5mm-6.35mm

    Stainless Steel Welded Tube

    ASTM A789/A789M: OD: Φ12.7mm-Φ203mm; WT:0.5mm-4.0mm

     

     

     
    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.

    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. 
    Duplex Stainless Steel Pipe,Alloy 2507 Super Duplex Stainless Steel Pipes / Tubes ASTM / ASME A / SA789 A/SA790 A/SA928

     

     

    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

     

     

    General Properties

    Alloy 2507 is a super duplex stainless steel with 25% chromium, 4% molybdenum, and 7% nickel designed for demanding applications which require exceptional strength and corrosion resistance, such as chemical process, petrochemical, and seawater equipment. The steel has excellent resistance to chloride stress corrosion cracking, high thermal conductivity and a low coefficient of thermal expansion. The high chromium, molybdenum, and nitrogen levels provide excellent resistance to pitting, crevice, and general corrosion.

    The impact strength is also high. Alloy 2507 is not recommended for applications which require long exposures to temperatures above 5700F because of the risk of a reduction in toughness.

    Applications

    • Oil and gas industry equipment
    • Offshore platforms, heat exchangers, process and service water systems, fire-fighting systems, injection and ballast water systems
    • Chemical process industries, heat exchangers, vessels, and piping
    • Desalination plants, high pressure RO-plant and seawater piping
    • Mechanical and structural components, high strength, corrosion-resistant parts
    • Power industry FGD systems, utility and industrial scrubber systems, absorber towers, ducting, and piping

    Standards
    ASTM/ASME .......... A240 - UNS S32750
    EURONORM............ 1.4410 - X2 Cr Ni MoN 25.7.4
    AFNOR.................... Z3 CN 25.06 Az

    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.
    Pitting Corrosion 
    Different testing methods can be used to establish the pitting resistance of steels in chloride-containing solutions. The data above were measured by an electrochemical technique based on ASTM G 61. The critical pitting temperatures (CPT) of several high-performance steels in a 1M sodium chloride solution were determined. The results illustrate the excellent resistance of 2507 to pitting corrosion. The normal data spread for each grade is indicated by the dark gray portion of the bar.

    Crevice Corrosion
    The presence of crevices, almost unavoidable in practical constructions and operations, makes stainless steels more susceptable to corrosion in chloride enviroments. 2507 is highly resistant to crevice corrosion. The critical crevice corrosion temperatures of 2507 and several other high-performance stainless steels are shown above.

    Chemical Analysis
    Typical values (Weight %)

     

    C Cr Ni Mo N Others
    0.020 25 7 4.0 .27 S=0.001
    PREN = [Cr%] + 3.3 [Mo%] + 16 [N%] ≥ 40

     

    Mechanical Properties
    Mechanical and Physical Properties 
    2507 combines high tensile and impact strength with a low coefficient of thermal expansion and high thermal conductivity. These properties are suitable for many structural and mechanical components. The low, ambient, and elevated temperature mechanical properties of 2507 sheet and plate are shown below. All of the test data shown are for samples in the annealed and quenched condition.
    2507 is not recommended for applications which require long exposures to temperatures in excess of 5700F because of the increased risk of a reduction in toughness. The data listed here are typical for wrought products and should not be regarded as a maximum or minimum value unless specifically stated.
    Mechanical Properties

     

    Ultimate Tensile Strength, ksi 116 min.
    0.2% Offset Yield Strength 0.2%, ksi 80 min.
    0.1% Offset Yield Strength 0.2%, ksi 91 min.
    Elongation in 2 inches, % 15 min.
    Hardness Rockwell C 32 max.
    Impact Energy, ft.-lbs. 74 min.

     

    Low Temperature Impact Properties

     

    Temperature 0F RT 34 -4 -40
    Ft.-lbs. 162 162 155 140
    Temperature 0F -76 -112 -148 -320
    Ft.-lbs. 110 44 30 7

     

    Elevated Temperature Tensile Properties

     

    Temperature 0F 68 212 302 392 482
    0.2% Offset Yield Strength, ksi 80 65 61 58 55
    Ultimate Tensile Strength, ksi 116 101 98 95 94

     

    Physical Properties

     

    Density lb/in3 0.28
    Modulus of Elasticity psi x 106 29
    Coefficient of Thermal Expansion 
    68-2120F/0F
    x10-6/0F 7.2
    Thermal Conductivity Btu/h ft 0F 8.7
    Heat Capacity Btu/lb/0F 0.12
    Electrical Resistivity W-in x 10-6 31.5

     

    Processing
    Hot forming
    2507 should be hot worked between 18750F and 22500F. This should be followed by a solution anneal at 19250F minimum and a rapid air or water quench.
    Cold Forming 
    Most of the common stainless steel forming methods can be used for cold working 2507. The alloy has a higher yield strength and lower ductility than the austenitic steels so fabricators may find that higher forming forces, increased radius of bending, and increased allowance for springback are necessary. Deep drawing, stretch forming, and similar processes are more difficult to perform on 2507 than on an austenitic stainless steel. When forming requires more than 10% cold deformation, a solution anneal and quench are recommended.
    Heat Treatment
    2507 should be solution annealed and quenched after either hot or cold forming. Solution annealing should be done at a minimum of 19250F. Annealing should be followed immediately by a rapid air or water quench. To obtain maximum corrosion resistance, heat treated products should be pickled and rinsed.

    Welding
    2507 possesses good weldability and can be joined to itself or other materials by shielded metal arc welding (SMAW), gas tungsten arc welding (GTAW), plasma arc welding (PAW), flux cored wire (FCW), or submerged arc welding (SAW). 2507/P100 filler metal is suggested when welding 2507 because it will produce the appropriate duplex weld structure.

    Preheating of 2507 is not necessary except to prevent condensation on cold metal. The interpass weld temperature should not exceed 3000F or the weld integrity can be adversely affected. The root should be shielded with argon or 90% N2/10% H2 purging gas for maximum corrosion resistance. The latter provides better corrosion resistance.

    If welding is to be done on only one surface and post-weld cleaning is not possible, GTAW is suggested for root passes. GTAW or PAW should not be done without a filler metal unless post-weld cleanup is possible. A heat input of 5-38 kJ/in. should be used for SMAW or GTAW. A heat input of about 50kJ/in. can be used for SAW.

     

    Some of the quality tests carried out by us includes:

    Corrosion Test Conducted only when specially requested by the client
    Chemical Analysis Test done as per required quality standards
    Destructive / Mechanical Testing Tensile | Hardness | Flattening | Flare | Flange
    Reverse-bend and Re. flat tests Carried out in full compliance with relevant standards & ASTM A-450 and A-530 norms, which ensures trouble-free expansion, welding & use at customers end
    Eddy Current Testing Done to detect homogeneities in subsurface by using Digital Flaw-mark Testing System
    Hydrostatic Testing 100% Hydrostatic Testing carried out according to ASTM-A 450 norms for checking tube leakage, and biggest pressure we can support 20Mpa/7s .
    Air Under Pressure Test To check any evidence of air leakage.
    Visual Inspection After passivation, every single length of tubes & pipes is subjected to thorough visual inspection by trained staff for detecting surface flaws & other imperfections


    Supplementary Testing : Apart from the above mentioned tests, we also carry out on the manufactured products supplementary testing. The tests conducted under this include:

    • Eddy Current Testing
    • O.P Testing
    • Radiography Testing
    • Corrosion Testing
    • Micro Testing
    • Macro Testing
    • IGC Testing
    • Ultrasonic testing
    • Liquid Penetrate testing

     

     

     

    Contact Details
    Yuhong Group Co.,Ltd

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