INCONEL 725-SHANGHAI KANGSHENG AVIATION MATERIALS TECHNOLOGY CO., LTD.

INCONEL 725

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Product Description

A nickel-chromium-molybdenum-niobium alloy that is highly resistant to corrosion and is age hardenable for extremely high strength. The strength of this alloy is developed by heat treatment to achieve high ductility and toughness. The alloy is resistant to hydrogen embrittlement and stress-corrosion cracking. Used for hangers, landing nipples, side pocket mandrels and polished bore receptacles in sour gas service. Also used for high-strength fasteners in marine applications.

STANDARD PRODUCT FORMS

Round bar and wire.

MAJOR SPECIFICATIONS

UNS N07725
ASTM B 805
ASME Code Case 2217
NACE MR-0175/ISO 15156
SMC HA91

LIMITING CHEMICAL COMPOSITION, %

Ni.......55.0 – 59.0
Cr.......19.0 – 22.5
Mo.......... 7.0 – 9.5
Nb....... 2.75 – 4.0
Ti............1.0 – 1.7
Al..........0.35 max.
C...........0.03 max.
Mn........0.35 max.
Si..........0.20 max.
P......... 0.015 max.
S........ 0.010 max.
Fe............ Balance

PHYSICAL CONSTANTS AND THERMAL PROPERTIES

Density, Ib/in3..........................................................................0.300
g/cm3......................................................................... 8.31
Melting Point, °F......................................................2320 – 2449
°C......................................................1271 – 1343
Permeability at 200 Oersted (15.9 kA/m).................. <1.001
Coefficient of Expansion, 70 – 200°F, 10-6 in/in •°F......7.22
20 – 100°C, μm/m •°C.......... 13.0
Thermal Conductivity, Btu • in/ft2• h•°F........................... 73.8
W/m•°C........................................... 10.6
Electrical Resistivity, ohm • circ mil/ft.............................. 688
μΩ•m...............................................1.144

TYPICAL MECHANICAL PROPERTIES