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

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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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