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    A286 Lock Nuts

    Incoloy® Alloy A286 is iron-nickel-chromium based austenitic iron based material that consist of molybdenum and titanium as an addition. Cres A286 alloy is known for its good strength and oxidation resistance especially at temperatures up to 1300°F (700°C). A286 is an age-hardenable iron-nickel-chromium alloy that is one of the most popular and widely used of high temperature alloys. It maintains good strength with oxidation resistance at temperatures of up to 1300°F. A286 is used in various components, such as aircraft and industrial gas turbines due to is high strength and superior fabrication. A286 is also very popular in offshore oil and gas industry where high levels of heat and stress are a factor.

    A286 Lock Nut Chemical Properties

    Nickel Iron Chromium Titanium Molybdenum Vanadium Carbon Manganese Silicon Aluminum Sulfur Boron
    24.0-27.0 Balance* 13.5-16.0 1.90-2.35 1.0-1.5 0.10-0.50 0.08 max. 2 max. 1 max. 0.35 max. 0.03 max. 0.001-0.01

    A286 Lock Nut Mechanical Properties

    Mechanical properties at room temperature

    • Tensile strength R m (MPa) solution annealed: 900 - 1150
    • Yield strength R p0.2 (MPa) solution annealed: minute 600
    • Elongation A 5 (%) solution annealed: minute 15% r
    • Notched impact strength (J / qcm) ISO-V (average value): minute 56 (longitudinal) - min 32 (transverse)

    Mechanical properties at elevated temperatures

    Strength Characteristic Delivery Condition Temperature °C
    100 200 300 400 500
    R p0.2 hardened 580 540 520 490 380

    A286 Distorted Thread Flange Lock Nuts

    Thread Size Wd. Ht. Dia. Thick. Specifications Met Part Number
    #2-56 1/8 " 3/32 " 0.167" 0.01" NAS1291C02M 98892A800
    #4-40 5/32 " 1/8 " 0.206" 0.03" MS21043-04 98892A100
    #6-32 3/16 " 9/64 " 0.244" 0.03" MS21043-06 98892A200
    #8-32 7/32 " 3/16 " 0.29" 0.03" MS21043-08 98892A300
    #10-32 1/4 " 3/16 " 0.33" 0.03" MS21043-3 98892A400
    1/4"-28UNF 5/16 " 7/32 " 0.42" 0.04" MS21043-4 98892A500
    5/16"-24UNF 3/8 " 17/64 " 0.52" 0.04" MS21043-5 98892A600
    3/8"-24UNF 7/16 " 9/32 " 0.62" 0.04" MS21043-6 98892A700

    A286 Lock Nut Specifications

    • AECMA PrEn2171
    • AECMA PrEN2119
    • AECMA PrEN2172
    • AECMA PrEN2173
    • AECMA PrEN2174
    • AECMA PrEN2303
    • AECMA PrEN2304
    • AECMA PrEN2398
    • AECMA PrEN2399
    • AECMA PrEN3510
    • A286 AMS 5737
    • A286 AMS 5853
    • A286 AMS 5895
    • A286 AMS 5726
    • A286 AMS 5731
    • A286 AMS 5732
    • A286 AMS 5734
    • ASME SA 891 (Type 1, 2)
    • ASME SA 638 (Grade 660 Type 1, 2)
    • ASME SA 453 (Grade 660 Class A, B, C, D)
    • ASTM A891 (Type 1, 2)
    • ASTM A638 (Grade 660 Type 1, 2)
    • ASTM A453 (Grade 660 Class A, B, C, D)
    • BS HR 51
    • BS HR 52
    • X5NiCrTi26-15
    • X4NiCrTi25-15
    • X6NiCrTiMoVB25-15-2
    • GE C50TF78
    • GE C50TF27
    • GE C50TF20
    • GE B50T1181C
    • UNS S66286
    • SAE J467-A286
    • SPS M-118
    • Fairchild MS 301
    • 314 Elliott Turbine MS 618 Weatherford WS-881
    • Cameron MS-003030
    • EN 2399
    • PWA-LCS
    • GE-S400/1000
    • RR SABRe Edition 2
    • EN 1.4944
    • EN 1.4943
    • EN 1.4980