UNS N10675 (GB NS323 Hastelloy B-3)

Short Introduction:

  • GB NS323(00Mo30Ni65Fe2cr2)Material grades and equivalents Hastelloy B-3/GB NS323/UNS N10675/SEW VDIUV W.Nr.2.4600,NiMo29cr,Nimofer6628

  • Hastelloy B-3 is a nickel-molybdenum alloy with excellent resistance to pitting, corrosion, and stress-corrosion cracking plus, thermal stability superior to that of alloy B-2.



    GB NS323 / Hastelloy B-3 /UNS N10675

    GB NS323(00Mo30Ni65Fe2cr2)Material grades and equivalents Hastelloy B-3/GB NS323/UNS N10675/SEW VDIUV W.Nr.2.4600,NiMo29cr,Nimofer6628

     GB NS323 Chemical compostion:

    Ni Mo Fe C Co Cr Mn Si Ti W Al Cu
    65.0 min 28.5 1.5 0.01 max 3.0 max 1.5 3.0 max 0.10 max 0.2 max 3.0 max 0.50 max 0.20 max

     GB NS323 Physical properties: 




     GB NS323 Alloy mechanical properties :

    Ultimate tensile strength, ksi 0.2 % yield strength, ksi Elongation %
    120 60.6 53.4
    120.7 55.3 56.9
    110 47 59.7
    104.4 43.5 63.4
    102 42.4 62
    97.8 39 59



    Hastelloy B3 (UNS grade N10675) is a nickel-based superalloy composed of nickel, molybdenum, cobalt and other elements, containing about 65% nickel. It is a new material based on Hastelloy B2 and improved. The thermal stability of the material improves corrosion resistance while improving hot forming and cold forming properties. In recent years, it has been increasingly used in the production of chemical equipment.

    Excellent corrosion resistance of B-3 alloy

    • HASTELLOY B-3 alloy is a new member of the nickel-molybdenum alloy family and has excellent corrosion resistance for any temperature and concentration of hydrochloric acid. “Morning Tiger Alloy” found that it has good corrosion resistance to sulfuric acid, acetic acid, formic acid, phosphoric acid and other non-oxidizing media.

    • Due to the adjustment of its chemical composition, its thermal stability has been greatly improved compared to the original HASTELLOY B-2 alloy. B-3 alloys have high resistance to pitting corrosion, stress corrosion cracking, knife corrosion and corrosion in the heat affected zone of welding.

    B-3 alloy processing and manufacturing

    • Due to improvements, the thermal stability of the HASTELLOY B-3 alloy has been significantly improved to minimize the problems associated with the processing of previous B-2 alloy parts. At this time, since the tendency of the formation of a harmful phase between the metals is small in the B-3 alloy, it has greater toughness than B-2 in the heating process and in various subsequent forms of thermal cycling. B-3 alloy has good forming and welding properties.

    • When the 1230℃ is heated, forging and other hot working can be performed if there is sufficient time to heat the parts as a whole. B-3 alloy is a low carbon alloy that can be used to control the grain size by controlling the final forging temperature. B-3 alloys can also be formed by cold working, although faster work hardening occurs, but all conventional cold working techniques are applicable to it.

      Tests have shown that when the B-3 alloy has a cold compression set of not more than 50% in boiling hydrochloric acid having a concentration of 20%, its ability to resist uniform corrosion is not lowered as compared with that in the case of solution heat treatment.

    • B-3 alloy can be welded by all common welding methods. The welding grade is ERNIMO-10. Pay special attention to certain precautions during welding to prevent excessive heat input.

    B-3 alloy thermal stability

    The biggest advantage of B-3 alloys compared to B-2 alloys is that they maintain excellent toughness when exposed to moderate temperatures. This exposure typically occurs regularly during the heat treatment of the process. When exposed to temperatures of 700 for a short period of time, the B-2 alloy is very susceptible to embrittlement, while the B-3 alloy exhibits significant embrittlement resistance and can be exposed for up to several hours. This provides great convenience for the alloy to be made complex, such as parts of a forming device.

    B-3 alloy heat treatment

    All HASTELLOY B-3 alloy forgings are supplied in a solution heat treated condition unless specifically requested by the customer. The temperature of the B-3 alloy was 1065 and then quenched rapidly.
    Thin plate or wire for bright annealing, heating at 1150, followed by cooling in hydrogen

    Applied field:

    HASTELLOY B-3 alloy is suitable for all previous applications of B-2 alloy. Like the B-2 alloy, B-3 is definitely not recommended for use in environments where ferric salts and divalent copper salts are present, as these salts can quickly cause corrosion damage. When hydrochloric acid comes into contact with iron and copper, it will chemically react with it to form a ferric salt and a divalent copper salt.



    Plate, Sheet, Strip

     ASTM B333, ASME SB333



     Welded Pipe

    ASTM B619, ASME SB619, CLASS I or II, (ABOVE 8 SCH 40)       ASTM B775,ASME SB775

     Seamless Pipe

     ASTM B622, ASME SB622


    Shanghai HY Industry Co., Ltd has international first-class material production equipment such as high temperature alloy isothermal forging production line, CONSARC vacuum melting furnace, VAR vacuum arc remelting furnace etc., with strong professional ability and highly responsible management team. We are a member of China Application of nuclear energy materials, Member of the International Council of the Aeronautical Sciences,China Electronic Materials Industry Association Magnetic Materials Branch. Years of experience in special alloy. When you have superalloy material inquiry, please contact us without hesitation. Shanghai HY Industry Co., Ltd is Corrosion & fatigue nickel alloy professional manufacturer,We will provide you with sincere and thoughtful service.

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