.jpg)
Topics Covered
Background
Properties of Super Alloy A-286 Sheet and Coil
Chemical Composition of Super Alloy A-286
Physical Properties of A-286
Linear Co-Efficient of Thermal Expansion of A-286
Thermal Conductivity of A-286
Specific Heat of A-286
Magnetic Permeability
Electrical Resistsivity of A-286
Mechanical Properties
Standards
Background
United Performance Metals is a leading supplier of specialty stainless steel and high temperature alloys. In business since 1982, we have experience serving the needs of customers in diverse markets including aerospace, aircraft, automotive, medical, food service, house-wares, and many others.
United Performance Metals stocks a comprehensive inventory of stainless steel sheet, stainless steel coil and stainless steel plate. We are also specialists in high temperature and cobalt alloys including Inconel 625, Inconel 718, A-286, 188 Alloy and L605.
In addition to our comprehensive inventory, we also have complete in-house processing capabilities including leveling, shearing, slitting and edging. When you call, you’ll talk to experienced people who know their business, and yours. Make your life a little easier.
Properties of Super Alloy A-286
Type A-286 alloy (S66286) is an iron-base superalloy useful for applications requiring high strength and corrosion resistance up to 1300°F (704°C) and for lower stress applications at higher temperatures.
Type A-286 alloy is a heat and corrosion resistant austenitic ironbase material which can be age hardened to a high strength level. The alloy is also used for low temperature applications requiring a ductile, non-magnetic high strength material at temperatures ranging from above room temperature down to at least -320°F (-196°C). The alloy may be used for moderate corrosion applications in aqueous solutions.
Type A-286 alloy can be produced by AOD refining or vacuum induction melting. Vacuum arc or electroslag remelting procedures may be used to further refine the material. Type A-286 alloy is available in plate, sheet and strip.
Chemical Composition of Super Alloy A-286
Typical chemical analysis of Super Alloy A-286
|
Element |
Percentage |
| Carbon |
0.08 max |
| Manganese |
0.35 max |
| Phosphorus |
0.015 max |
| Sulfur |
0.015 max |
| Silicon |
0.35 max |
| Chromium |
17-21 |
| Nickel |
50-55 |
| Molybdenum |
2.80-3.30 |
| Columbium |
4.75-5.50 |
| Titanium |
0.65-1.15 |
| Aluminum |
0.20-0.80 |
| Cobalt |
1.00 max |
| Boron |
0.006 max |
| Copper |
0.30 max |
| Tantalum |
0.05 max |
| Iron |
Balance |
Corrosion and Oxidation Resistance of A-286
Type A-286 alloy content is similar in chromium, nickel, and molybdenum to some of the austenitic stainless steels. Consequently, A-286 alloy possesses a level of aqueous corrosion resistance comparable to that of the austenitic stainless steels. In elevated temperature service, the level of corrosion resistance to atmospheres such as those encountered in jet engine applications is excellent to at least 1300°F (704°C).
Oxidation resistance of A-286 is high for continuous service up to 1500°F (816°C) and intermittent service up to 1800°F (982°C).
Physical Properties of A-286
Typical physical properties of A-286 are summarized in the table below.
| |
Solution Treated |
Solution Treated and Aged |
| Density |
0.286 lb/in3 (7.92 g/cm3) |
0.287 lb/in3 (7.94 g/cm3) |
| Specific Gravity |
7.92 |
7.94 |
| Melting Range |
2500-2600°F |
1370-1430°C |
Linear Co-Efficient of Thermal Expansion of A-286
The linear co-efficient of thermal expansion for solution treated and aged A-286 is provided below.
|
Temperature Range |
Linear Co-Efficient of Thermal Expansion
(x 10-6) |
|
°C |
°F |
/°C |
/°F |
|
21-93 |
70-200 |
16.5 |
9.17 |
|
21-204 |
70-400 |
16.8 |
9.35 |
|
21-316 |
70-600 |
17.0 |
9.47 |
|
21-427 |
70-800 |
17.4 |
9.64 |
|
21-538 |
70-1000 |
17.6 |
9.78 |
|
21-649 |
70-1200 |
17.8 |
9.88 |
|
21-760 |
70-1400 |
18.6 |
10.32 |
Thermal Conductivity of A-286
The thermal conductivity at various temperatures for A-286 are given in the following table.
|
Temperature Range |
|
|
°C |
°F |
W/m.K |
Btu.ft/ft2.hr.°F |
|
150 |
302 |
15.1 |
8.7 |
|
300 |
572 |
17.8 |
10.3 |
|
500 |
932 |
21.8 |
12.6 |
|
600 |
1112 |
23.9 |
13.8 |
Specific Heat of A-286
The specific heat of A-286 420 J/kg.K or 0.10 Btu/lb/°F
Magnetic Permeability
The magnetic permeability of A-286 is:
- Solution treated - 1.010
- Solution treated and aged - 1.007
Electrical Resistsivity of A-286
Electrical resistivity values as a function of temperature for A-286 are given in the following table.
|
Temperature Range |
micro ohm-cm |
|
°C |
°F |
|
25 |
77 |
91.0 |
|
540 |
1004 |
115.6 |
|
650 |
1202 |
118.8 |
|
730 |
1346 |
120.1 |
|
815 |
1499 |
122.4 |
Mechanical Properties
Type A-286 alloy is formed most easily in the solution treated condition. Typical room temperature tensile properties of A-286 solution treated at 1800°F (982°C) are shown below.
|
Yield Strength |
Ultimate Tensile Strength |
Elongation |
|
40,000 psi
|
90,000 psi |
40% |
|
275 MPa |
620 MPa |
|
Standards
United Performance Metals A-286 is supplied to AMS 5525 and has the UNS designation S66286
For sizes and availability of Inconel 625 contact United Performance Metals.
Source: United Performance Metals
For more information on this source, please visit United Performance Metals