A286 Stainless Steel A286 Alloy

A286 Stainless Steel Specifications:

AMS 5731 AMS 5732 AMS 5734 AMS 5737 AMS 5895 ASTM A638 Elliott Turbine MS618 EN10204 DIN3.1B. AISI 660 AISI 662 AMS 5525 AMS 5726 AMS 5731 AMS 5732 AMS 5734 AMS 5737 AMS 5804 AMS 5805 AMS 5853 AMS 5858 AMS 5895 ASTM A453 Grade 660 ASTM A638 Grade 660 DIN 1.4943 DIN 1.4944 GE B50T1181 GE B50T12 GE B50T81 SPS M250 UNS S66286

A286 Stainless Steel Typical Room Temperature Mechanical properties

Solution treated 1800°F (982°C) for one hour and oil quenched, aged 1325°F (719°C) 16 hours and air cooled.

A286 Stainless Steel Typical Mechanical Properties

A286 Stainless Steel other

AMS 5853 – 15% cold reduced (160 ksi/ 1103 Mpa tensile strength)

AMS 5726 – 40-50% cold reduced (200 ksi/ 1379 Mpa tensile strength)

A286 Stainless Steel Physical properties:

A286 Stainless Steel Corrosion Resistance

The following table is for reference only, many factors can affect the corrosive resistance, a corrosion test for each application should be applied.

A286 Stainless Steel Heat Treatment:

The alloy is solution annealed at 1800°F and oil quenched, followed by holding at 1325°F for 16 hours and air cool. This treatment develops high strength for the alloy.

A286 Stainless Steel Hardening:

As with austenitic stainless steel hardening of this alloy is accomplished by cold working. However the alloy, as is common with many of the iron-nickel alloys containing titanium, may be age hardened. Refer to “Aging” listing.

A286 Stainless Steel Solution Treated

A286 Solution Treated is covered by specification AMS 5731 (AMS 5732 Capable) and BS HR52

A286 Stainless Steel Solution Treated and Aged (1800°F)

A286 Solution Treated and Aged is covered by specifications AMS 5732, BS HR51, ASTM A638 660 Type 2, ASTM A453 660 Class B

A286 Stainless Steel Solution Treated and Aged (1650°F)

A286 Solution Treated and Aged is covered by specifications AMS 5737, ASTM A638 660 Type 1, ASTM A453 660 Class A and EN-2303 (under 4″ Bar)

A286 Stainless Steel Applications:

Used for reasonably low cost when moderate strength and oxidation resistance are required at temperatures greater than suitable for stainless steels. This alloy finds application in gas turbine forgings. It is suited for use up to a temperature of about 1300°F in corrosive environment (such as gas turbines) and to 1500°F for continuous service in oxidizing environments.

A286 Stainless Steel Machinability:

A-286 will machine easier than other high temperature metals, such as 718. Using carbide inserts will help. Readily machined by standard methods. Similar in behavior to the machining of the austenitic stainless steel. Cemented carbide tools are best for high cutting rates as in turning operations. Turning: Surface speed of 300-325 fpm using carbide tooling at feed rate of 0.008 inches per revolution. Use water base coolant or lubricant. Drilling: High speed steel drills with a positive rake work well. Feed rates are 0.001″ to 0.006″ per revolution, with the smaller feed rate the smaller the hole diameter being drilled. Surface speed range 25-35 feet per minute. Milling: Rigid machines and fixtures are essential for a good milled finish. Cutting speeds of 30-40 surface feet per minute with a feed rate of 0.003″ to 0.005″ per mill cutter tooth should be used. Grinding behavior is very similar to that of steel. Wet grinding is best using aluminum oxide grinding wheels.

A286 Stainless Steel Welding:

As with all nickel containing alloy cleanliness of the area to be welded is of paramount importance. Welding procedures and processes are the same as used for stainless steel. Preheating or post welding heat treatment is not required. Welds should always have a raised (convex) weld bead and matching filler metal should be used. The alloy should be in the solution annealed condition for optimum welding results. It is susceptible to hot cracking and that tendency is aggravated in the aged condition.