Special Metals INCOLOY® 25-6MO Super Austenitic Stainless Steel (UNS N08926)

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Special Metals INCOLOY® 25-6MO Super Austenitic Stainless Steel (UNS N08926)
Categories:	Metal; Ferrous Metal; Stainless Steel
Material Notes:	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. Data provided by the manufacturer, Special Metals.
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Physical Properties	Original Value	Comments

Density	0.290 lb/in³

Mechanical Properties	Original Value	Comments
Hardness, Rockwell B	86
Tensile Strength	590 MPa @Temperature 538 °C	Annealed before test
Tensile Strength, Ultimate	100000 psi	Annealed
Tensile Strength, Yield	48000 psi @Strain 0.2 %	Annealed
	220 MPa @Strain 0.2 %, Temperature 538 °C	Annealed before test
Elongation at Break	>= 42 %	in 2 in (50 mm) or 4D; Annealed
	55 % @Temperature 538 °C	Annealed before test
Modulus of Elasticity	188 GPa	for Hot Rolled and Annealed Plate [2100°F (1149°C)/1h/WQ]
Poissons Ratio	0.33
Shear Modulus	77.0 GPa

Electrical Properties	Original Value	Comments
Electrical Resistivity	0.0000800 ohm-cm
Magnetic Permeability	1.005	at 200 Oersted (15.9 kA/m)

Thermal Properties	Original Value	Comments
CTE, linear	15.18 µm/m-°C @Temperature 25.0 - 100 °C	Mean for Hot Rolled and Annealed Plate [2100°F (1149°C)/1h/WQ]
	16.03 µm/m-°C @Temperature 25.0 - 300 °C	Mean for Hot Rolled and Annealed Plate [2100°F (1149°C)/1h/WQ]
	16.56 µm/m-°C @Temperature 25.0 - 500 °C	Mean for Hot Rolled and Annealed Plate [2100°F (1149°C)/1h/WQ]
	17.18 µm/m-°C @Temperature 25.0 - 700 °C	Mean for Hot Rolled and Annealed Plate [2100°F (1149°C)/1h/WQ]
Specific Heat Capacity	0.500 J/g-°C
Thermal Conductivity	11.5 W/m-K
Melting Point	1320 - 1400 °C
Solidus	1320 °C
Liquidus	1400 °C
Maximum Service Temperature, Air	1000 °F	typical use

Component Elements Properties	Original Value	Comments
Carbon, C	<= 0.20 %
Chromium, Cr	19 - 21 %
Copper, Cu	0.50 - 1.5 %
Iron, Fe	47.3 %	As remainder
Manganese, Mn	<= 2.0 %
Molybdenum, Mo	6.0 - 7.0 %
Nickel, Ni	24 - 26 %
Nitrogen, N	0.15 - 0.25 %
Phosphorus, P	<= 0.030 %
Silicon, Si	<= 0.50 %
Sulfur, S	<= 0.010 %

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NINCO00 / 17433

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