Stainless Steel

A 286 Alloys

Specs: AMS 5732, AMS 5737, ASTM-A-453 GRADE 660 CLASS A, ASTM-A-638 GRADE 660 TYPE 1, ASTM-A-453 GRADE 660 CLASS B, ASTM-A-638 GRADE 660 TYPE 2
UNS# K66286

Alloy A286 features high strength, oxidation resistance, and corrosion resistance at continuously high temperatures. A286 alloys are heat treatable to achieve a wide variety of grain structures and tensile properties. This grade of A286 is annealed and aged. Applications for Alloy A286 include jet engine components, superchargers, turbine wheels and blades, fasteners, springs, and general high-stress components in petrochemical, aerospace, and oil patch industries.

Details

A286 is an iron-nickel-chromium alloy with additions of molybdenum and titanium. A286 is one of the most popular high-temperature alloys. As one of the austenitic alloys, it maintains good strength and oxidation resistance at temperatures up to 1300ºF (700ºC).

 

It also contains niobium for stabilization against sensitization and resultant intergranular corrosion. A286 has excellent resistance to general corrosion, pitting, and crevice corrosion in chemicals containing chlorides and sulphuric, phosphoric, and nitric acids. Used for tanks, piping, heat exchangers, pumps, valves, and other process equipment.

 

Due to its high strength and excellent fabrication characteristics, A286 is used in various components of aircraft and industrial gas turbines. The alloy is also widely used in the offshore oil and gas industry where the components are subject to high levels of heat and stress.

 

Cold forming can also be conducted in the solution heat-treated condition to aid the properties after age hardening.

 

A286 bar can be solution treated at the temperatures detailed below, rapid cooled and then age hardened at 1325ºF (720ºC) for 16 hours and air cooling. The 1800ºF (980ºC) solution treatment produces the highest creep-rupture strength in age-hardened material whereas the 1650ºF (900ºC) treatment results in improved ductility and room temperature strength.

 

5737 is Solution Heat treated (annealed) at 1650 deg F +/- 25 degrees, then precipitation Heat treated (aged) between 1300-1400 degrees F for at least 16 hours, then air-cooled, achieve a min tensile of 140 KSI, min yield of 95 KSI, Min elongation of 12% and a min Reduction of area of 15%.

 

5732 is Solution Heat treated (annealed) at 1800 deg F +/- 25 degrees, then precipitation Heat treated (aged) between 1300-1400 degrees F for at least 16 hours, then air-cooled to achieve a min tensile of 130 KSI, min yield of 85 KSI, Min elongation of 15% and a min Reduction of area of 20%.

Available shapes – round

Tools

Related Products

Applications

  • Jet Engine Components
  • Super Chargers
  • Turbine Wheels
  • Gas turbine, disks, blades, and shafts
  • Compressors
  • After burner parts
  • High temperature fasteners and springs
  • Non-magnetic cryogenic equipment down to -423º F
  • Manifold Components in the oil and gas industry
  • Heat exchange, tanks, pumps, piping, valves

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    Specifications

    Specifications of A286

    International
    Standards
    Material
    Designation
    Tube & Pipe
    Seamless
    Sheet, Strip
    & Plate
    Rod & Bar Wire Forgings
    USA
    ASTM
    UNS S66286
    UNS K66286
        ASTM A 453 Grade 660 Class A and B
    ASTM 1 638 Grade 660 Type 1 and 2
       
    ASME       ASME SA-638    
    SAE       SAE J467-A286    
    AMS   AMS 5731
    AMS 5732
    AMS 5734
    AMS 5737
    AMS 5895
    AMS 5525
    AMS 5858
    AMS 5726
    AMS 5731
    AMS 5732
    AMS 5734
    AMS 5735
    AMS 5736
    AMS 5737
    AMS 5853
    AMS 5895
    AMS 5726
    AMS 5731
    AMS 5732
    AMS 5734
    AMS 5737
    AMS 5805
    AMS 5853
    AMS 5895
    AMS 5731
    AMS 5732
    AMS 5734
    AMS 5737
    AMS 5895
    Custom     GEB50T1181
    GEB50T12
    GEB50T81
    GEB50T1181
    GEB50T12
    GEB50T81
      GEB50T12
    GEB50T81
    Europe
    AECMA
    ASD-STAN
        AECMA Pr EN 2175
    AECMA Pr EN 2417
    AECMA Pr EN 2171
    AECMA Pr EN 2119
    AECMA Pr EN 2173
      AECMA Pr EN 2172
    AECMA Pr EN 2399
    UK
    British Standard
          BS HR 51
    BS HR 52
    BS HR 560
    DTD 5076
       
    France
    AFNOR
          EZ 6NCT25-15    
    Mechanical Properties

    Mechanical Properties of A286

    Tests on 7/8″(22.2mm) diameter bar stock solution treated to 1800°F (982°C), 1 hour, oil quenched and aged at 1325°F (719°C), for 16 hours and then air-cooled.

    Temp
    °F  ºc
    Ultimate Tensile Strength
    Ksi      N/mm²
    0.2% Yield Strength
    Ksi      N/mm²
    Elong in 2″
    %
    Reduction of Area
    %
    Charpy V-notch
    ft-lb     joules
    70          21 145        1000 95         655 24 43 64       86.8
    400     204 143        986 93.5     645 21 53 59       80
    800     427 138        951 93        641 18 35 51       69
    1000     538 131         903 87        603 18 31 45      33
    1200     649 103.5     714 88       607 13 14 35      47.5
    1400     760 64          441 62       427 18 23 52      70.5
    Physical Properties

    Physical Properties of Aluminum Bronze A286

    Physical Properties Imperial Units Metric Units
    Density 0.287 lb/in³ 7.94 g/cm³
    Melting Range 2500-2600ºF 1370-1430ºc
    Hot Working Range 1900-2050ºF 1038-1121ºc
    Max Service Temp (Air)
    Continuous Service
    1800ºF 982ºc
    Mean Liner Expansion 0-200ºc   16.5μm/m.ºc
    Mean Liner Expansion 0-400 ºF 0.00916 in/in/ ºF x10³
    Specific Heat 0.101Btu/lb/ ºF @68ºF 420J/kg ºc
    Poisson’s Ratio 0.30 0.30
    Curie Temperature 70-120 ºF 21-49 ºc
    Magnetic Permeability    
    Solution Heat Treated 1.01 1.010
    Aged 1.007 1.007
    Thermal Conductivity 88Btu-in/hr/ft²/ ºF 12.7W/m. ºc
    Electrical Conductivity 547ohm-circmil/ft 0.910μΩ.m
    Electrical Resistivity 8.48µΩin 22.4μΩcm
    Modulus of Elasticity 10³    
    Tension 29ksi 201N/mm²
    Shear Modulus 11.2ksi 77N/mm²

    While the data is believed to be accurate, Wieland Diversified makes no representation or warranty of any kind (expressed or implied) and assumes no responsibility with respect to the accuracy and values shown above; this information should only be used as a guide.

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