A-286 (660B)

Stainless Steel

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.

Click here to download a A-286 (660B) data sheet.

stainless steel
  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 S4­31­00 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
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