wear resistant alloysnitronic and stellite for galling

Alloy 6B Corrosion Materials

  • DescriptionIndustries & ApplicationsResistance to CorrosionFabrication and Heat TreatmentAlloy 6B is a cobalt-based alloy with great wear, erosion and abrasion resistance. The wear resistance of alloy 6B is due to the chemical composition and is not a product of heat treatment or other hardening mechanisms. The low coecient of friction of alloy 6B allows it to resist seizing and galling; proving useful in areas and applications where lubrication is dicult or impractical. Even under constant erosive conditions, alloy 6B has shown exceptional cavitation erosion resistance. Elevated temperature exposuCobalt Base Hardfacing Alloys Polymet CorporationPolyStel 21 is an excellent alloy for corrosion resistance, galling, cavitation, and metal to metal wear resistance. PolyStel 21 products are equivalent in nominal chemical compositions, physical properties, and performance properties to the Stellite brand. PolyStel 21 products meet the requirements of AWS A 5.21 ERCCoCr-E, ERCoCr-E, and ECoCr-E. GENERALPROPERTIESANDTYPICALAPPLICATIONSALLOY NITRONIC® 60 (UNSS21800) PRODUCTDATABULLETIN Plate 3/16andthicker.Widthsto126,lengthsto480 Forlargerdimensionsinquire. Plate Products cutbar,plasmacutormachinedringsanddiscs,heads,rolledandtack-weldedcylinders,andspecialcutshapes MECHANICAL AND PHYSICAL PROPERTIES Tensile Strength, ksi, min. 95 Yield Strength (0.2% o

    Galling resistance of hardfacing alloys replacing Stellite

    Self-mated iron-base Elmax, APM 2311, NOREM A, Nelsit, Everit 50 So alloys and Ni/Fe-base alloy combination showed better galling behaviour than Stellite 6. In particular, Elmax and APM 2311 alloys showed extraordinary high galling resistance. Instead of galling, the surface cracks by a Galling resistant stainless - proprietary alloys - Steel Nov 10, 2011 · Nitronic 60, Gall-Tough, and Gall-Tough PLUS are all being considered. The melt chemistries of Nitronic 60 and Gall-Tough PLUS are similar with the exception of manganese limits. Data sheets also list the UNS S21800 designation for both these alloys so I assume both fall within the composition limits for that designate. Hardfacing Alloys and Processes for Advanced Ultra

    • Hardfacing AlloysOther AlternativesHardfacing ProcessesConclusionHigh-temperature valves isolate, relieve pressure and/or control flow for the systems in which they are installed, serving as pressure vessels for the flow of liquids, gases and slurries. Steam valves, for example, regulate the flow and pressure levels of steam and heated water vapor. Cobalt-based hardfacing alloys such as Stellite 6 (Co-29.0%Cr-4.5%W-1.1%C) are often used on seating faces to minimize wear and prevent both seizing and galling. The Stellite hardfacing overlays provide excellent Carlson Alloy Nitronic 60 - spacematdbNitronic 60 is an anti-galling and wear resistant austenitic stainless steel. It provides a significantly lower cost alternative to combat wear and galling when compared with cobalt-bearing and high nickel alloys. The uniform corrosion resistance of Nitronic 60 is superior to 304 in most media. Chloride pitting resistance is superior to 316.

      NITRONIC 60 (Alloy 218, UNS S21800) - HPA eStore

      • OverviewCharacteristicsTensile DataApplicationsMachiningAustenitic Stainless Nitronic 60 is truly an all purpose metal. This fully austenitic alloy was originally designed as a temperature alloy, and subsequently has good high temperature properties for temperatures around 1800ºF. The oxidation resistance of Nitronic 60 is similar to Type 309 S.S., and far superior to Type 304S.S. This grade is best known for its wear and galling resistance. The additions of Silicon and Manganese have given this alloy a matrix to inhibit wear, galling, and fretting even in the anWO2015196032A1 - Cobalt-free, galling and wear resistant Cobalt-free, galling and wear resistant austenitic stainless steel hard-facing alloy Download PDF Info Publication number WO2015196032A1. WO2015196032A1 PCT/US2015/036612 US2015036612W WO2015196032A1 WO 2015196032 A1 WO2015196032 A1 WO 2015196032A1 US 2015036612 W US2015036612 W US 2015036612W WO 2015196032 A1 WO2015196032 A1 WO 2015196032A1 REVIEW OF THE WEAR AND GALLING CHARACTERISTICS The remaining standard alloys exhibit fair to good galling resistance in a few combinations. On the other hand, two austenitic stainless steel alloys in the Nitronic family (32 and 60) exhibit high galling resistance. The latter alloy was developed especially to exhibit antigalling and metal-to-metal wear resistance. STELLITE 6 - Arc Welding ServiceStellite cobalt base alloys consist of complex carbides in an alloy martrix. They are resistant to wear, galling and. corrosion and retain these properties at high temperatures. Their exceptional wear resistance is due mainly to the. unique inherent characteristics of the hard carbide phase dispersed in a CoCr alloy matrix.

        The Basics of Stellites in Machining Perspective

        The formation of hard carbides in stellite alloys provides sliding wear and abrasion wear resistance and the chromium carbide (Cr-C) matrix provides resistance to galling, cavitations and corrosion. Stellites exhibit excellent metal-on-metal anti-galling behaviour [3]. Table 1 below shows the chemical composition of various grades of The Many Applications of Nitronic 60 - Langley AlloysMay 01, 2020 · Wear resistance in a number of different settings, against itself, other metals or other materials is very good for a corrosion-resistant alloy. Its galling resistance is also extremely good, in a self-couple or with a dissimilar metal. Galling occurs when two metal surfaces join together, caused by micro-welding across their surfaces. US4487630A - Wear-resistant stainless steel - Google PatentsA high chromium stainless steel especially suited for use as wear (galling) resisting components, for example, valve parts. A typical alloy generally contains chromium, nickel, silicon, carbon, an effective cobalt content and the balance iron plus normal impurities. The alloy may be produced in the form of castings, P/M products, hardfacing and welding materials and wrought mill products.

        Wear Resistant Alloys in NITRONIC and STELLITE

        High strength fully Austenitic alloy that resists galling and wear. Significantly lower cost to extend part life and lower maintenance. The yield strength is twice that of 304 and 316 stainless steels, in the annealed condition. Tensile strengths can be produced in excess of 200 ksi.