INCOLOY 25-6MO

A super-austenitic containing 6% molybedenum and offering excellent corrosion-resistance to neutral and acidic environments containing chlorides or other halides, such as what is found in air pollution control and flue gas desulfurization systems. The molybdenum and nitrogen content provide resistance to pitting and crevice corrosion, while copper enhances resistance to sulfuric acid. The alloy is especially suited for service in high-chloride environments such as brackish water, seawater, caustic chlorides and pulp mill bleach systems.

Pipe, tube, sheet, strip, plate, round bar, forging stock
and wire.

UNS N08925, N08926
ASTM A 240, A 480, B 366,
B 472, B 625, B 649, B 673,
B 674, B 677, B 751, B 775,
B 804, B 829
W. Nr. 1.4529
ASME SA-240, SA-480, SB-366,
SB-472, SB-625, SB-649,
SB-673, SB-674, SB-677,
SB-751, SB-775, SB-804,
SB-829
ASME Code Cases 2120,
N-453, N-454, N-455

Ni.......24.0 – 26.0
Fe.......Remainder
Cr......19.0 – 21.0
Mo.......... 6.0 – 7.0
Cu..........0.5 – 1.5
N........0.15 – 0.25
C...........0.02 max.
Mn.......... 2.0 max.
P............0.03 max.
S...........0.01 max.
Si............ 0.5 max.

Density, Ib/in³ (g/cm³)............................................0.290 (8.03)
Melting Range, °F (°C)...............2410 – 2550 (1320 – 1400)
Specific Heat, Btu/lb•°F (J/kg•°C)........................ 0.12 (500)
Permeability at 200 Oersted (15.9 kA/m).....................1.005
Coefficient of Expansion, 10^-6 in/in•°F (μm/m•°C)
70-200°F (21-93°C)...................... 8.42 (15.2)
70-800°F (21-427°C)................... 9.12 (16.4)
70-1200°F (21-649°C)................. 9.41 (16.9)
Thermal ConductivityA, Btu • in/ft²•h•°F......................... 79.8
W/m •°C......................................... 11.5
Electrical ResistivityA, ohm •circ mil/ft.............................. 480
μΩ•m............................................... 0.80
Young's ModulusA, 10⁶ psi (GPa).............................27.3 (188)
ARoom temperature, as annealed.