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ALLOY A-286 COMPOSITION

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Super Alloy A-286

Related Metals:

Pyrotool Alloy A(tm)
Udimet A-286(tm)
Pyromet Alloy A-286(tm)
Nickelvac A-286(tm)
JBK 75(tm)
Altemp 286(tm)
Pyromet A-286(tm)                                    

Specifications:

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

Chemistry Data

Aluminum

0.1 - 0.3

Boron

0.02 max

Carbon

0.08 max

Chromium

14 - 16

Iron

Balance

Manganese

1 - 1.5

Molybdenum

1 - 1.6

Nickel

24.5 - 27

Titanium

1.5 - 2.5

General Information

Principal Design Features

An iron based high temperature, high strength alloy.


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


Machinability

Readily machined by standard methods. Similar in behavior to the machining of the austenitic (300 series) stainless steels. Cemented carbide tools are best for high cutting rates as in turning operations. Turning: Surface speed of 300-325 fpm using ca


Forming

This alloy can be readily cold or hot formed using conventional procedures. Generally minimum diameter for bending is 1 times the thickness of the sheet or strip and 2 times thickness for plate. Forming behavior is similar to that for Type 310 stainless


Corrosion Resistance

A-286 alloy is suitable for use in moderately corrosive aqueous media. Generally the A-286 alloy is similar to the 300 series stainless steels in regard to corrosion resistance. It is subject to crevice corrosion and to chloride stress corrosion crackin


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 alwa


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.


Forging

Light forging can be done in the temperature range of 1600-1850 F. Heavy forging is done at temperatures in the range of 1850-2200F.


Hot Working

See "Forging".


Cold Working

This alloy is readily cold worked in a manner similar to that of the austenitic (300 series) stainless steels. Severe cold forming will result in work hardening which will necessitate a solution anneal heat treatment to soften the alloy.


Annealing

See "Heat Treatment".


Aging

Aging of this alloy for high strength can be accomplished at 1325 F for 16 hours followed by an air cool. Aging is done after first giving the alloy a solution heat treatment at 1800 F.


Hardening

As with austenitic stainless steels 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.


Physical Data

Density (lb / cu. in.)

0.286

Specific Gravity

7.9

Specific Heat (Btu/lb/Deg F - [32-212 Deg F])

0.1

Melting Point (Deg F)

2550

Poissons Ratio

0.3

Mean Coeff Thermal Expansion

9.17

Magnetic Permeability

1.01

Modulus of Elasticity Tension

29.1

Mechanical Data

MSO currently has no data available for this grade.

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