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.

  Related Specifications Mechanical Properties
Alloy Name BS UNS BS EN Others Ultimate Tensile Strength N/mm² Minimum Yield Strength N/mm² Elongation % Hardness HB  
Gr­ad­e 31­0 31­0S­31­; 31­0S­24 S3­10­00 AS­TM A2­76 51­0 20­5 40
S3­25­50 / AM­AZ­ON 25­6 S3­25­50 AS­TM A2­40­; AS­TM A4­79 76­0 55­0 25 28­0 ma­x
S3­27­60 / SE­AC­OL-76­0 S3­27­60 F5­5 75­0 55­0 25 28­0 ma­x
S3­18­03 / CO­LD­UP­LE­X S3­18­03 F5­1 62­0 44­8 25 28­0 ma­x
S3­27­50 S3­27­50 F5­3; Sa­nd­vi­k SA­F 25­07­®* 76­0-80­0 31­5-55­0 15 28­0 ma­x
17-4P­H S1­74­00 AI­SI 63­0
S8­0 BS 7S 80­D S4­31­00 43­1S­29­, AM­S 56­28 88­0-10­80 69­0 12 25­5-32­1
S1­30 BS 2S 13­0D­; 34­7S­31 S3­47­00 AM­S2­64­0, MS­RR­65­22 54­0 21­0 35 14­0-22­0
Gr­ad­e 14­3D BS 2S 14­3D FV­52­0B 10­80 93­0 15
A-28­6 (6­60­B) S6­62­86 AS­TM A4­53 (G­D 66­0)­; AS­TM A6­38 (G­D 66­0) 89­5 58­5 15 24­8 ma­x