What is the room-temperature tensile strength of A286?

Solution-treated and aged A286 (ASTM A453 grade 660) typically delivers 130 ksi (895 MPa) minimum tensile, 95 ksi (655 MPa) minimum yield, 15 % minimum elongation and 18 % minimum reduction of area at 21 °C.

What is the creep-rupture strength of A286 at 650 °C?

At 650 °C, A286 retains a 1000-hour stress-rupture strength of approximately 410 MPa (60 ksi) and a 100,000-hour stress-rupture strength of around 240 MPa (35 ksi), depending on heat-treatment temper.

What is the maximum service temperature of A286?

Continuous service to 700 °C with retained strength and oxidation resistance. Above 700 °C, gamma-prime over-ages and strength falls; nickel-base superalloys (Inconel 718, Waspaloy) are preferred for higher temperatures.

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A286 Mechanical Properties

A286 Specifications

Aecma Specifications

AECMA PrEn2171
AECMA PrEN2119
AECMA PrEN2172
AECMA PrEN2173
AECMA PrEN2174
AECMA PrEN2303
AECMA PrEN2304
AECMA PrEN2398
AECMA PrEN2399
AECMA PrEN3510

AMS Specifications

ASME Specifications

ASME SA 891 (Type 1, 2)
ASME SA 638 (Grade 660 Type 1, 2)
ASME SA 453 (Grade 660 Class A, B, C, D)

ASTM Specifications

BS Specifications

BS HR 51
BS HR 52

European Specifications

X5NiCrTi26-15 (DIN 1.4980)
X4NiCrTi25-15
X6NiCrTiMoVB25-15-2

GE Specifications

GE C50TF78
GE C50TF27
GE C50TF20
GE B50T1181C

Others

UNS S66286
SAE J467-A286
SPS M-118
Fairchild MS 301
314 Elliott Turbine MS 618 Weatherford WS-881
Cameron MS-003030
EN 2399
PWA-LCS
GE-S400/1000
RR SABRe Edition 2

Werkstoff Numbers

EN 1.4944
EN 1.4943
EN 1.4980

A286 Mechanical Properties Across Specifications

A286 mechanical properties (yield strength, tensile strength, hardness, elongation, density) follow the requirements of the applicable specification. Reference pages: AMS 5732 (≥ 895 MPa tensile / ≥ 655 MPa yield) · AMS 5737 (precision-aged) · ASTM A453 grade 660 (Class A/B/C/D variants) · ASTM A638 grade 660 (Type 1/2 forgings).

A286 retains mechanical properties from cryogenic to elevated temperatures. Industry applications relying on these properties: jet engine fasteners · gas turbine · nuclear · aerospace.

Compare against alternative alloys: A286 vs Inconel 718 · A286 vs 17-4 PH · A286 vs Waspaloy · A286 vs Nimonic 80A.

Related canonical A286 reference: A286 chemical composition · A286 heat treatment · A286 machinability · AMS / ASTM specifications hub.

Xylan 1070 / 1014 / 1400 / 1424

Xylar 2 / 101

Geomet 321 / 500 / 720

SermaGard 1105 / 1280

Dacromet 320 / 500

TakeCoat 1000 Ceramic

Delta Tone/Seal

Magnigard

MolyKote

Sherardized

Zinc-Cobalt (ASTM B840)

Zinc-Nickel (ASTM B841)

ISO 9001 - 2015 Certified
PED 2014/68/EC
NACE MR0175/ISO 15156-2
NORSOK M-650
DFAR
MERKBLATT AD 2000 W2/W7/W10

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Alloy A286 Mechanical Properties, Tensile, Creep, Stress-Rupture

Alloy A286 (UNS S66286) develops its strength through precipitation of gamma-prime Ni₃(Ti,Al) during the 720 °C / 16-hour aging cycle. The values below correspond to ASTM A453 grade 660 Class A (solution-treated 980 °C, oil-quenched, aged 720 °C / 16 h) and represent typical specimen results, certified test reports per heat are available on request.

A286 Tensile Properties, Yield, Ultimate, Elongation at RT to 700 °C

Test Temperature	0.2 % Yield (MPa)	UTS (MPa)	Elongation (%)	Reduction of Area (%)
21 °C (RT)	655	895	15	18
425 °C	595	810	17	25
540 °C	580	770	19	28
650 °C	540	685	21	35
700 °C	485	580	25	42

A286 Stress-Rupture Strength, 1000-Hour Life at Temperature

Stress to cause rupture in 1000 hours at temperature (typical, AMS 5732 condition):

540 °C, 540 MPa (78 ksi)
650 °C, 410 MPa (60 ksi)
700 °C, 275 MPa (40 ksi)
730 °C, 175 MPa (25 ksi)

A286 Hardness, Modulus of Elasticity & Density

Hardness (aged): 277-302 HBW / 30-32 HRC
Young’s Modulus at 21 °C: 201 GPa (29 × 10⁶ psi)
Young’s Modulus at 650 °C: 162 GPa (23.5 × 10⁶ psi)
Density: 7.92 g/cm³ (0.286 lb/in³)
Coefficient of thermal expansion (21-540 °C): 16.9 × 10⁻⁶/°C
Thermal conductivity at 100 °C: 13.8 W/(m·K)

A286 Charpy V-Notch Impact & Cryogenic Toughness

Typical Charpy impact energy at 21 °C: 35-45 J. Impact energy at −196 °C (cryogenic): 30-40 J, A286 retains usable toughness down to liquid-nitrogen temperatures, supporting aerospace and LNG cryogenic-service fastener applications.

A286 Creep Strength at 540-700 °C

A286 creep strength is the rate-controlling property for sustained-temperature service. Typical creep rate (1 % deformation in 1000 hours per AMS 5732 condition):

540 °C at 380 MPa, ~0.001 %/h creep rate
650 °C at 280 MPa, ~0.001 %/h creep rate
700 °C at 165 MPa, ~0.001 %/h creep rate

For sustained service above 700 °C with continuous load, A286 creep deformation accumulates beyond useful design margin. Waspaloy retains usable creep resistance to ~870 °C; Nimonic 80A to ~815 °C. For 540-700 °C continuous service A286 is the cost-efficient choice; above this temperature switch to higher-temperature superalloys.

A286 Mechanical Properties vs Alternative Alloys

For engineers selecting A286 against alternative precipitation-hardening alloys, the relevant mechanical-property comparisons:

A286 vs Inconel 718, Inconel 718 has 39 % higher tensile strength but 3-4× the cost. A286 wins for cost-efficient service ≤ 700 °C.
A286 vs 17-4 PH, 17-4 PH has 78 % higher yield at room temp but limited to 315 °C. A286 wins for > 315 °C and non-magnetic applications.
A286 vs Waspaloy, Waspaloy retains strength to 870 °C but at 5-7× cost. A286 wins for ≤ 700 °C cost-efficient.
A286 vs Nimonic 80A, Nimonic 80A retains stress-rupture strength to 815 °C but at 3-4× cost. A286 wins for ≤ 700 °C.

A286 Mechanical Properties by Specification

Mechanical property requirements differ by specification, full per-spec property tables on the dedicated pages:

AMS 5731, sol-treated bar (yield ≥ 380 MPa, customer ages downstream).
AMS 5732, sol-treated and aged bar (yield ≥ 655 MPa).
AMS 5737, precision-aged bar (yield ≥ 655 MPa, tighter property uniformity).
ASTM A453 grade 660, Classes A (yield 655 MPa), B (585 MPa), C (per spec), D (per spec).
ASTM A638 grade 660, Type 1 (655 MPa yield), Type 2 (585 MPa yield, higher stress-rupture).