A-286 (660B)

Alloy A-286 (660B) is special corrosion, oxidation and heat resistant, precipitation hardenable austenitic stainless steel. It is designed for long-term, high strength service up to 700°C. It is non-magnetic even after severe cold deformation. The alloy has good oxidation resistance in continuous service up to 800°C.

Alloy A-286 (660B) has good machinability and machines best in the precipitation-hardened condition when it has a machinability rating 45% that of AISI1212 free-cutting grade. The alloy is used mainly in the precipitation-hardened condition. The hardness is 248 HB min for precipitation-hardened grades but hardness must not exceed 330HB to meet the NACE MR0175 requirements. Samples must also meet the stress rupture requirements of a minimum elongation of 3% when tested at 650°C.

Related Specifications of Alloy A-286 (660B)

  • S66286
  • ASTM A453 (GD 660)
  • ASTM A638 (GD 660)
  • NACE MR 0175
  • 1.4980
  • X6NiCrTiMoVB25-15-2 (EU)

Nominal Composition of Alloy A-286 (660B)

Fe 56%, Ni 25.5%, Cr 15.0% Ti 2.1%, Mo 1.5%

Mechanical Properties of Alloy A-286 (660B)

Ultimate Tensile Strength (N/mm²) Proof Stress (N/mm²) Elongation (%) Hardness (HB)
895 585 15 248 max

Key Features of Alloy A-286 (660B)

  • Very high corrosion resistance
  • Good oxidation resistance up to 800°C
  • Non-magnetic even after severe cold deformation
  • High strengths that are well retained up to 700°C
  • Good machinability

Application of Alloy A-286 (660B)

Offshore & marine | Fasteners, and critical pump / valve components

Aerospace | Turbine shafts, aero engine components and high performance fasteners

Power generation | Components for gas turbines, turbine discs, and turbine blades

Other | Springs, screws, bolts, thrust nozzles and transmission parts

Columbia Metals - a leading supplier of Alloy A-286 (660B)

With decades of experience and a huge range of stock, Columbia Metals is an industry leader in the supply of Alloy A-286 (660B) and other high quality specialist engineering alloys.

To buy or learn more about Alloy A-286 (660B) contact us now, or fill in the enquiry form on the right hand side and we will be in touch shortly.

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  Related Specifications Mechanical Properties
Alloy Name BS UNS BS EN Others Ultimate Tensile Strength N/mm² Minimum Yield Strength N/mm² Elongation % Hardness HB