Ferralium Alloy 255 heat treated at 1120°C, cooled rapidly, 10.2-19 mm thick plate

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Ferralium Alloy 255 heat treated at 1120°C, cooled rapidly, 10.2-19 mm thick plate
Categories:	Metal; Ferrous Metal; Heat Resisting; Stainless Steel
Material Notes:	Patented, ferritic-austenitic; high mechanical strength, ductility, and hardness with resistance to corrosion and erosion. Excellent resistance to acids and salts. Duplex alloy with nearly equal portions of austenite and ferrite-matrix phases. Applications include pumps, agitators, valves, and piping for handling wet phosphoric acid slurries, marine scrubbers, pumps and seals, and acid handling equipment.
Key Words:	UNS S32550
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Physical Properties	Original Value	Comments

Density	7.81 g/cc

Mechanical Properties	Original Value	Comments
Tensile Strength, Ultimate	867.4 MPa
	580 MPa @Temperature 540 °C
	694.3 MPa @Temperature 425 °C
	704 MPa @Temperature 205 °C
	706.7 MPa @Temperature 315 °C
	786 MPa @Temperature 95.0 °C
Tensile Strength, Yield	674 MPa @Strain 0.2 %
	425 MPa @Strain 0.2 %, Temperature 540 °C
	487 MPa @Strain 0.2 %, Temperature 425 °C
	494 MPa @Strain 0.2 %, Temperature 315 °C
	515 MPa @Strain 0.2 %, Temperature 205 °C
	594 MPa @Strain 0.2 %, Temperature 95.0 °C
Elongation at Break	27 %	in 50 mm
	26 % @Temperature 425 °C	in 50 mm
	27 % @Temperature 95.0 °C	in 50 mm
	27 % @Temperature 205 °C	in 50 mm
	28 % @Temperature 540 °C	in 50 mm
	29 % @Temperature 315 °C	in 50 mm
Modulus of Elasticity	210 GPa
	165 GPa @Temperature 540 °C
	179 GPa @Temperature 425 °C
	189 GPa @Temperature 315 °C
	198 GPa @Temperature 205 °C
	206 GPa @Temperature 95.0 °C

Electrical Properties	Original Value	Comments
Electrical Resistivity	0.0000840 ohm-cm @Temperature 25.0 °C

Thermal Properties	Original Value	Comments
CTE, linear	11.0 µm/m-°C @Temperature 20.0 - 93.0 °C
	11.7 µm/m-°C @Temperature 20.0 - 205 °C
	12.1 µm/m-°C @Temperature 20.0 - 315 °C
	12.4 µm/m-°C @Temperature 20.0 - 425 °C
	13.0 µm/m-°C @Temperature 20.0 - 540 °C
Specific Heat Capacity	0.480 J/g-°C	Typical value for stainless steel.
Thermal Conductivity	15.1 W/m-K @Temperature 100 °C

Component Elements Properties	Original Value	Comments
Carbon, C	<= 0.040 %
Chromium, Cr	26 %
Copper, Cu	1.7 %
Iron, Fe	62 %
Manganese, Mn	0.80 %
Molybdenum, Mo	3.3 %
Nickel, Ni	5.5 %
Nitrogen, N	0.17 %
Silicon, Si	0.45 %

References for this datasheet.

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MQN255O / 13882

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