• A manufacturer for special materials pipes, tubes,fittings,materials including nickel-based alloy, austenitic, ferritic, duplex stainless steel
  • stainless steel seamless pipe,duplex stainless steel seamless tubes, nickel alloy, nickel base alloy seamless tube and pipe,butt-welding fitting, elbow, tee, cross, flange,valve.
  • Zhongzhou Special Alloy Tube Co.,ltd is glable special alloy and stainless steel products company, which is international piping system material manufacturer and upplier, office located in Shanghai. In glable business, we have sucess to entrying North America, Europea, East Asia, Austrialia,Africa market.Our focus on natural gas transportation,offshore unit,chemical refining,nuclear power,shipbuilding,steel structure,machining and so on piping system engineering. We have strong resources integration, production and processing base are located in Shanghai and Jiangshu province, The factories in Shanghai and Jiangsu,which have vacuum smelting, non-vacuum smelting, horizontal continuous casting, forging, heat treatment and production lines advanced in the industry, and has international advanced technology and complete inspection means. Produces focus on : nickel base alloy,cobalt base alloy,iron base alloy,austenitic stainless steel,super austenitic stainless steel,duplex and super duplex stainless steel,high alloy material products; type are bars,pipes,tubes,fittings,flanges,which are widely used in metallurgy,cars,thermal power, nuclear power, petro-chemical, aviation and aerospace, rail transportation , paper industry,water industry and so on. Material and size as follows: Nickel based Alloy : ASTM SB163, SB165, SB444, SB622, SB407, SB535, SB677, SB668, SB729,Inconel 600,601,625,670,690,718,X-750;Inconel 800,800H/HT,825,840,901,926,330,20;Hastelloy C-276 Super stainless steel: 904L,254MO Duplex/Super Duplex UNS S31803,S32205,S32750,S32760, ASTM A/SA312, A/SA213, A/SA269, EN10216-5 Austenitic Pipe & Tube Standard:GOST9941-81, GOST5632-72 .ASTM/ASME A312/SA312, A269/SA269, ASTM A511, EN10216-5,DIN17458-85,DIN17456-85,JIS G3459,JISG3463,JISG3448,JISG3446,304,304L,316,316L,316Ti,310S,309S,321,321Ti,347 Oil and Gas Cement and Minerals Fertilizers and Petrochemicals Metallurgy and cars industry Mechanical industry Wastewater Treatment and other water industry paper industry, aviation and aerospace Transmission and rail transportation thermal power and other power Generation nuclear power Environmental and Safety our strong supporting layer and our sales’ professional skills will help customers to supply efficient and timely packaged supporting serivces. We have some stock bars ,pipes, fittings .Our quality is always satisfied by our clients, we are strictly controling the whole production and testing. We will always adhere to the policy of
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    Ni-Cr-Fe inconel 690 alloy UNS N06690

    Pipes,tubes

    Buttweld Fitting

    Round,Square bars

    Plates,Sheets,Strips

    Flanges & Other kinds of forgings products

     

    Nickel-Chromium-Iron  N06690,Inconel 690,alloy 690, W. Nr. 2.4642

    Chemical Compostion:

    Ni

    Cr

    Iron

    Mn

    C 

    Cu

    Si     max

    S    max

    58.0min

    27.0-31.0

    7.0-11.0

    0.50

    0.050

    0.50

    0.50

    0.015

     

    Mechanical Properties:

    Tensile Strength,Min PSI (MPa)

    Yield Strength (0.2% offset) Min(Mpa)

    Elongation in 2 in. or 50mm or 4D,Min.,%

    Density

    85000 (586)

    35000 (241)

    30

    8.19g/cm3

     


     STandards: 

    Standard Material Seamless Tubing   &/or Pipe Plate/Sheet/Strip Bar Forging and   Forging stock
    SB-167, SB-163 N06690 B167/SB-167,B163/SB-163,B829/SB-829 B168/SB-168 B564/SB-564


     

    Inconel alloy 690

    UNS N06690

    Werkstoff Nr:2.4642

      

    Alloy 690 is a high-chromium nickel alloy that exhibits excellent resistance to many corrosive aqueous media and high temperature environments by oxidizing acids,especially nitric acid,hydrofluoric acid and salts solutions, and to sulfidation at high-temperatures. Examples are tail-gas reheaters used in nitric acid production and heating coils and tanks for nitric/hydrofluoric solutions used in pickling of stainless steels and reprocessing of nuclear fuels.In addition to its corrosion resistance, alloy 690 has high strength, good metallurgical stability, and favourable fabrication characteristics.

    However, the alloy shows excellent resistance to stress-corrosion cracking and low corrosion rates under various high-temperature solutions.

    Manufacturing Process

    Alloy 690 is readily fabricated using conventional techniques used for high-nickel alloys. This alloy is not hardenable by heat treatment, and it is normally used in the annealed condition.

    It exhibits excellent weldability, and it can be welded using filler metals and welding electrode. The temperature range for heavy hot forming of alloy 690 is 1040 to 1230°C (1900 to 2250°F). Light forming can be done at temperatures down to 870°C (1600°F).

    The following are some of the major applications of alloy 690:

    • Tail-gas reheaters used in nitric acid production

    • Coal-gasification units

    • Glass vitrification equipment for radioactive waste disposal

    • Incinerators

    • Furnaces for  petrochemical processing

    • Burners and  ducts for processing sulfuric acid


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