AMS 5736 is the SAE Aerospace Material Specification covering A286 (UNS S66286) bar and forgings in solution-treated and precipitation-aged condition with an alternate solution-treatment temperature for specific stress-rupture-strength applications. Used in aerospace forgings and high-stress-rupture-critical bolting where the AMS 5732 sol-treatment is replaced by an alternate cycle. See parent A286 AMS / ASTM specifications hub, related A286 forged bar, sister specs AMS 5731, AMS 5732, AMS 5734.
Spec Scope & Coverage
AMS 5736 covers A286 bar and forgings in solution-treated and aged condition. Solution-treatment temperature is intermediate between AMS 5732 (1650 °F) and AMS 5731 (1800 °F), producing a property profile balancing room-temperature tensile and elevated-temperature stress-rupture. Used in aerospace forging applications where the standard AMS 5732 cycle is not optimal.
A286 Chemical Composition (UNS S66286)
Element
Min %
Max %
Notes
Iron (Fe)
Balance
Balance
~53 % typical
Nickel (Ni)
24.0
27.0
Solid-solution stabilizer
Chromium (Cr)
13.5
16.0
Corrosion + oxidation resistance
Titanium (Ti)
1.90
2.35
Gamma-prime former (Ni3Ti)
Molybdenum (Mo)
1.00
1.50
Solid-solution strengthener
Vanadium (V)
0.10
0.50
Carbide stabilizer
Aluminium (Al)
0
0.35
Gamma-prime former (Ni3Al)
Boron (B)
0.001
0.010
Grain-boundary strengthening
Carbon (C)
0
0.08
Per ASTM A453
AMS 5736, A286 Bar and Forgings, Spec Requirements
Property
AMS 5736 requirement
Notes
Form
Bar and forgings
Aerospace standard form
Solution treatment
Per spec, alternate to AMS 5732
Intermediate sol temperature
Aging
1325 °F × 16 hours
Standard A286 aging
Tensile strength
≥ 895 MPa
Aged condition
Yield strength 0.2 %
≥ 605 MPa
Slightly different vs AMS 5732
Hardness
29-32 HRC
Aged target
When to Specify AMS 5736, A286 Bar and Forgings
Aerospace forging applications: AMS 5736 forgings for aerospace structural and engine forging applications requiring intermediate stress-rupture / tensile balance.
Specific OEM drawings: Drawings citing AMS 5736 directly, common on certain GE and Pratt & Whitney specifications. Substitute with AMS 5732 only with engineering approval.
Stricter alternative: For tighter hardness uniformity, specify AMS 5737 precision bar.
Standard aerospace alternative:AMS 5732 for general aerospace bar / forging / tubing.
A286 forging, AMS 5736, sol-treated and aged, drawing-specific dimensions, EN 10204 3.1, AS9102 first-article on lot.
AMS 5736, A286 Bar and Forgings, Frequently Asked Questions
What is AMS 5736?
SAE / AMS spec covering A286 (UNS S66286) bar and forgings in solution-treated and aged condition with alternate solution-treatment cycle balancing room-temperature tensile and elevated-temperature stress-rupture properties.
AMS 5736 vs AMS 5732, which to specify?
AMS 5736: alternate sol-treatment temperature, slightly different yield (≥ 605 MPa). AMS 5732: standard 1650 °F sol-treatment, yield ≥ 655 MPa. Specify per drawing, substitute only with engineering approval.
Can AMS 5732 substitute for AMS 5736?
Substitution requires engineering approval, the heat-treatment cycles produce different stress-rupture / tensile balance. Drawings citing AMS 5736 specifically should not be substituted without OEM approval.
Which OEMs use AMS 5736?
Some GE and Pratt & Whitney aerospace forging drawings specifically cite AMS 5736. Verify with OEM SRM before substituting alternate AMS spec.
Is AMS 5736 ASME pressure-vessel acceptable?
Generally yes, chemistry conforms to UNS S66286 acceptable in ASME Section III. Verify drawing-specific spec acceptance.
Is AMS 5736 magnetic?
No. Magnetic permeability < 1.005 verified per ASTM A342.
What's the lead time on AMS 5736 forgings?
Standard sizes 75-150 mm: 12-16 weeks from heat release. Larger sizes 150-300 mm: 16-20 weeks. AS9102 first-article + EN 10204 3.2 third-party witness: add 2-3 weeks.
Can AMS 5736 be NACE MR0175 compliant?
Yes, when supplied with hardness ≤ HRC 35 per NACE MR0175 / ISO 15156-3. Specify on PO.
What products use AMS 5736?
Aerospace forgings, engine casings, structural components, hot-section attach forgings, where the alternate sol-treatment property profile is specified per OEM drawing.
