An alloy that is precipitation hardenable for high mechanical properties. The alloy maintains good strength and oxidation resistance at temperatures up to about 1300˚F (700˚C). The alloy's high strength and excellent fabrication characteristics make it useful for various components of aircraft and industrial gas turbines. Applications include blades, vanes, shafts, tail cones, afterburners, springs and fasteners. This alloy is also used for automotive applications.

STANDARD PRODUCT FORMS

Sheet, strip, plate, round bar, flat bar, forging stock,
hexagon and wire.

MAJOR SPECIFICATIONS

UNS S66286
ASTM A 453, A 638
ASME SA-453, SA-638
SAE AMS 5525, 5726,
5731, 5732, 5734, 5737,
5858, 5895, 7235
BS HR 51, HR 52, HR 650
AECMA Pr EN 2119,
2171 – 2175, 2303, 2304,
2398, 2399, 2417, 3510
NACE MR-0175/ISO 15156
W. NR. 1.4980

LIMITING CHEMICAL COMPOSITION, %

Ni ...... 24.0 – 27.0
Cr.......13.5 – 16.0
Fe............ Balance
Ti.......1.90 – 2.35
Mo..........1.0 – 1.5
V.........0.10 – 0.50
C...........0.08 max.
Mn.......... 2.0 max.
Si............ 1.0 max.
Al..........0.35 max.
S........ 0.030 max.
B..... 0.001 – 0.01

PHYSICAL CONSTANTS AND THERMAL PROPERTIES

Density, Ib/in³.........................................................................0.287
g/cm³..........................................................................7.94
Melting Range, °F...................................................2500 – 2600
°C...................................................1370 – 1430
Specific Heat, Btu/lb•°F.....................................................0.100
J/kg•°C............................................................ 419
Permeability at 200 Oersted (15.9 kA/m).....................1.007
Coefficient of Expansion, 10^-6 in/in•°F (μm/m•°C)
70 - 200°F (21- 93°C)................... 9.09 (16.4)
70 - 800°F (21- 427°C).................9.61 (17.3)
70 -1400°F (21-760°C).................9.67 (17.4)
Thermal Conductivity^A, Btu • in/ft2•h•°F.............................88
W/m •°C......................................... 12.7
Electrical Resistivity^A, ohm •circ mil/ft.............................. 547
μΩ•m.............................................0.910
Young's Modulus^A, 106 psi.................................................... 29.1
GPa........................................................... 201
Hardness^A, HRC...........................................................................31
^ARoom temperature, as annealed.

TYPICAL MECHANICAL PROPERTIES

INCOLOY 890

INCOLOY 27-7MO