Special Metals INCOLOY® alloy 803 Fe-Ni-Cr Alloy

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Special Metals INCOLOY® alloy 803 Fe-Ni-Cr Alloy
Categories:	Metal; Nonferrous Metal; Nickel Alloy; Superalloy
Material Notes:	INCOLOY® alloy 803 (UNS S35045), an iron-nickel-chromium alloy, is designed for use in petrochemical, chemical and thermal processing applications. The nickel and chromium contents of alloy 803 are higher than those of INCOLOY alloys 800H and 800HT®. Alloy 803 is a cost-effective material which provides an exceptional level of high-temperature corrosion restance in oxidation, sulfidation and carburization environments. INCOLOY alloy 803 exhibits excellent stress-rupture strengths at elevated temperatures. These characteristics, along with a high resistance to carburization and cyclic oxidation, make INCOLOY alloy 803 the material of choice for many severe applications including ID-finned pyrolysis tubing in high-severity ethylene furnaces. INCOLOY alloy 803 is produced in all major product forms in a wide variety of sizes, finishes and tempers. One unique product form is internally finned, either straight or spiralled fins, cold finished tubing. Strict process controls ensure complete material traceability and structure consistency throughout the manufacture of all INCOLOY alloy 803 products. Information Provided by Special Metals Corporation
Key Words:	UNS S35045; ASTM A 240; A 480; ASME 2304; ASTM A 213; SA 249; A182
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Physical Properties	Original Value	Comments

Density	7.86 g/cc

Mechanical Properties	Original Value	Comments
Tensile Strength at Break	552 - 621 MPa	Sheet, Cold-rolled & Solution Annealed
	572 - 607 MPa	Rod, Hot-finished & Solution Annealed
	572 - 607 MPa	Plate, Hot-rolled & Solution Annealed
	586 - 627 MPa	Tubing, Cold-drawn & Solution Annealed
	55.0 MPa @Temperature 1093 °C	Solution Annealed Tubing
	96.0 MPa @Temperature 982 °C	Solution Annealed Tubing
	186 MPa @Temperature 871 °C	Solution Annealed Tubing
	290 MPa @Temperature 760 °C	Solution Annealed Tubing
	448 MPa @Temperature 649 °C	Solution Annealed Tubing
	608 MPa @Temperature 23.0 °C
	627 MPa @Temperature 20.0 °C	Solution Annealed Tubing
	640 MPa @Temperature 870 °C, Time 3.60e+6 sec	Room Temperature properties after Isothermal Exposure
	645 MPa @Temperature 870 °C, Time 1.80e+6 sec	Room Temperature properties after Isothermal Exposure
	703 MPa @Temperature 760 °C, Time 7.20e+6 sec	Room Temperature properties after Isothermal Exposure
	718 MPa @Temperature 760 °C, Time 3.60e+6 sec	Room Temperature properties after Isothermal Exposure
	726 MPa @Temperature 760 °C, Time 1.80e+6 sec	Room Temperature properties after Isothermal Exposure
	874 MPa @Temperature 650 °C, Time 3.60e+6 sec	Room Temperature properties after Isothermal Exposure
	887 MPa @Temperature 650 °C, Time 1.80e+6 sec	Room Temperature properties after Isothermal Exposure
Tensile Strength, Yield	207 - 255 MPa @Strain 0.2 %	Rod, Hot-finished & Solution Annealed
	275 - 296 MPa @Strain 0.2 %	Plate, Hot-rolled & Solution Annealed
	275 - 310 MPa @Strain 0.2 %	Tubing, Cold-drawn & Solution Annealed
	275 - 331 MPa @Strain 0.2 %	Sheet, Cold-rolled & Solution Annealed
	48.0 MPa @Strain 0.2 %, Temperature 1093 °C	Solution Annealed Tubing
	55.0 MPa @Strain 0.2 %, Temperature 982 °C	Solution Annealed Tubing
	124 MPa @Strain 0.2 %, Temperature 871 °C	Solution Annealed Tubing
	193 MPa @Strain 0.2 %, Temperature 649 °C	Solution Annealed Tubing
	193 MPa @Strain 0.2 %, Temperature 760 °C	Solution Annealed Tubing
	247 MPa @Strain 0.2 %, Temperature 20.0 °C	after Isothermal Exposure; Solution Annealed
	310 MPa @Strain 0.2 %, Temperature 20.0 °C	Solution Annealed Tubing
	259 MPa @Strain 0.2 %, Time 3.60e+6 sec	Room Temperature properties after Isothermal Exposure
	266 MPa @Strain 0.2 %, Time 1.80e+6 sec	Room Temperature properties after Isothermal Exposure
	289 MPa @Strain 0.2 %, Time 7.20e+6 sec	Room Temperature properties after Isothermal Exposure
	303 MPa @Strain 0.2 %, Time 3.60e+6 sec	Room Temperature properties after Isothermal Exposure
	316 MPa @Strain 0.2 %, Time 1.80e+6 sec	Room Temperature properties after Isothermal Exposure
	498 MPa @Strain 0.2 %, Time 3.60e+6 sec	Room Temperature properties after Isothermal Exposure
	500 MPa @Strain 0.2 %, Time 1.80e+6 sec	Room Temperature properties after Isothermal Exposure
	259 MPa @Strain 0.2 %, Treatment Temp. 870 °C	Room Temperature properties after Isothermal Exposure
	266 MPa @Strain 0.2 %, Treatment Temp. 870 °C	Room Temperature properties after Isothermal Exposure
	289 MPa @Strain 0.2 %, Treatment Temp. 760 °C	Room Temperature properties after Isothermal Exposure
	303 MPa @Strain 0.2 %, Treatment Temp. 760 °C	Room Temperature properties after Isothermal Exposure
	316 MPa @Strain 0.2 %, Treatment Temp. 760 °C	Room Temperature properties after Isothermal Exposure
	498 MPa @Strain 0.2 %, Treatment Temp. 650 °C	Room Temperature properties after Isothermal Exposure
	500 MPa @Strain 0.2 %, Treatment Temp. 650 °C	Room Temperature properties after Isothermal Exposure
Elongation at Break	40 - 45 %	Sheet, Cold-rolled & Solution Annealed
	43 - 47 %	Plate, Hot-rolled & Solution Annealed
	45 - 50 %	Tubing, Cold-drawn & Solution Annealed
	45 - 50 %	Rod, Hot-finished & Solution Annealed
	49 % @Temperature 20.0 °C	Solution Annealed Tubing
	49 % @Temperature 649 °C	Solution Annealed Tubing
	49.3 % @Temperature 23.0 °C
	66 % @Temperature 760 °C	Solution Annealed Tubing
	80 % @Temperature 982 °C	Solution Annealed Tubing
	80 % @Temperature 1093 °C	Solution Annealed Tubing
	88 % @Temperature 871 °C	Solution Annealed Tubing
	25.6 % @Treatment Temp. 650 °C, Time 3.60e+6 sec	Room Temperature properties after Isothermal Exposure
	27.5 % @Treatment Temp. 650 °C, Time 1.80e+6 sec	Room Temperature properties after Isothermal Exposure
	32.9 % @Treatment Temp. 760 °C, Time 7.20e+6 sec	Room Temperature properties after Isothermal Exposure
	33.9 % @Treatment Temp. 760 °C, Time 1.80e+6 sec	Room Temperature properties after Isothermal Exposure
	34.4 % @Treatment Temp. 760 °C, Time 3.60e+6 sec	Room Temperature properties after Isothermal Exposure
	38.1 % @Treatment Temp. 870 °C, Time 1.80e+6 sec	Room Temperature properties after Isothermal Exposure
	38.5 % @Treatment Temp. 870 °C, Time 3.60e+6 sec	Room Temperature properties after Isothermal Exposure
Reduction of Area	54 % @Temperature 760 °C	Solution Annealed Tubing
	55 % @Temperature 649 °C	Solution Annealed Tubing
	66 % @Temperature 871 °C	Solution Annealed Tubing
	67 % @Temperature 20.0 °C	Solution Annealed Tubing
	75 % @Temperature 982 °C	Solution Annealed Tubing
	77 % @Temperature 1093 °C	Solution Annealed Tubing
Creep Strength	3.00 MPa @Temperature 1093 °C	0.0001%/hr
	6.00 MPa @Temperature 1093 °C	0.005%/hr
	50.0 MPa @Temperature 760 °C	0.00002%/hr
	100 MPa @Temperature 760 °C	0.005%/hr
Rupture Strength	300 psi @Temperature 1150 °C, Time 7.20e+7 sec
	1500 psi @Temperature 1150 °C, Time 72000 sec
	30000 psi @Temperature 593 °C, Time 7.20e+7 sec
	60000 psi @Temperature 593 °C, Time 72000 sec
Modulus of Elasticity	195 GPa @Temperature 20.0 °C
Tensile Modulus	131.8 GPa @Temperature 1000 °C
	151.8 GPa @Temperature 700 °C
	171.1 GPa @Temperature 400 °C
	192.5 GPa @Temperature 100 °C
	195.3 GPa @Temperature 20.0 °C
Poissons Ratio	0.32 @Temperature 20.0 °C
Shear Modulus	73.8 GPa @Temperature 20.0 °C
Charpy Impact, Notched	407 J/cm² @Temperature 23.0 °C
	64.0 - 66.0 J/cm² @Treatment Temp. 760 °C, Time 7.20e+6 sec	Room Temperature properties after Isothermal Exposure
	76.0 - 86.0 J/cm² @Treatment Temp. 760 °C, Time 3.60e+6 sec	Room Temperature properties after Isothermal Exposure
	110 - 124 J/cm² @Treatment Temp. 870 °C, Time 3.60e+6 sec	Room Temperature properties after Isothermal Exposure
	124 - 127 J/cm² @Treatment Temp. 650 °C, Time 3.60e+6 sec	Room Temperature properties after Isothermal Exposure
	129 - 132 J/cm² @Treatment Temp. 650 °C, Time 1.80e+6 sec	Room Temperature properties after Isothermal Exposure
	136 J/cm² @Treatment Temp. 870 °C, Time 1.80e+6 sec	Room Temperature properties after Isothermal Exposure
	139 - 154 J/cm² @Treatment Temp. 760 °C, Time 1.80e+6 sec	Room Temperature properties after Isothermal Exposure

Electrical Properties	Original Value	Comments
Electrical Resistivity	0.000103 ohm-cm @Temperature 20.0 °C
	0.000106 ohm-cm @Temperature 100 °C
	0.000116 ohm-cm @Temperature 400 °C
	0.000123 ohm-cm @Temperature 700 °C
	0.000127 ohm-cm @Temperature 1000 °C
Magnetic Permeability	1.001	at 200 Oersted (15.9 kA/m)

Thermal Properties	Original Value	Comments
CTE, linear	14.0 µm/m-°C @Temperature 100 °C
	15.8 µm/m-°C @Temperature 400 °C
	16.9 µm/m-°C @Temperature 700 °C
	18.0 µm/m-°C @Temperature 1000 °C
	18.4 µm/m-°C @Temperature 1100 °C
Specific Heat Capacity	0.476 J/g-°C
Thermal Conductivity	11.3 W/m-K @Temperature 20.0 °C
	12.6 W/m-K @Temperature 100 °C
	17.7 W/m-K @Temperature 400 °C
	23.2 W/m-K @Temperature 700 °C
	27.4 W/m-K @Temperature 1000 °C
Melting Point	1365 - 1400 °C
Solidus	1365 °C
Liquidus	1400 °C

Component Elements Properties	Original Value	Comments
Aluminum, Al	0.15 - 0.60 %
Carbon, C	0.060 - 0.10 %
Chromium, Cr	25 - 29 %
Copper, Cu	<= 0.75 %
Iron, Fe	29.435 - 42.64 %	Balance
Manganese, Mn	<= 1.5 %
Nickel, Ni	32 - 37 %
Silicon, Si	<= 1.0 %
Sulfur, S	<= 0.015 %
Titanium, Ti	0.15 - 0.60 %

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