Outokumpu 4878 High Temperature Austenitic Stainless Steel

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Outokumpu 4878 High Temperature Austenitic Stainless Steel
Categories:	Metal; Ferrous Metal; Austenitic; Stainless Steel
Material Notes:	Heat-resistant variant of 1.4541, with a slightly higher max carbon content. Recommended max service temperature for this steel in dry air is 800°C. Applications: Heat and creep resistance. For use over 550°C for equipment and components within: Iron, steel, and non-ferrous industries Engineering industry Energy conservation plants Cement industry Available in hot rolled plate (Quarto), hot rolled strip/sheet (CPP), cold rolled strip/sheet, cold rolled narrow strip, bar, and rod forms.
Key Words:	EN 1.4878; ASTM 321; JIS SUS 321
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Physical Properties	Original Value	Comments

Density	7.90 g/cc	RT

Mechanical Properties	Original Value	Comments
Tensile Strength, Ultimate	570 MPa	Outokumpu Typical, Hot Rolled Plate (Quarto); EN 10002-1
	300 MPa @Temperature 600 °C	EN min.; EN 10002-5
	330 MPa @Temperature 500 °C	EN min.; EN 10002-5
	340 MPa @Temperature 400 °C	EN min.; EN 10002-5
	350 MPa @Temperature 300 °C	EN min.; EN 10002-5
	370 MPa @Temperature 200 °C	EN min.; EN 10002-5
	410 MPa @Temperature 100 °C	EN min.; EN 10002-5
Tensile Strength, Yield	250 MPa @Strain 0.2 %	Outokumpu Typical, Hot Rolled Plate (Quarto); EN 10002-1
	290 MPa @Strain 1 %	Outokumpu Typical, Hot Rolled Plate (Quarto); EN 10002-1
	103 MPa @Strain 0.2 %, Temperature 600 °C	EN min.; EN 10002-5
	113 MPa @Strain 0.2 %, Temperature 500 °C	EN min.; EN 10002-5
	123 MPa @Strain 0.2 %, Temperature 400 °C	EN min.; EN 10002-5
	132 MPa @Strain 0.2 %, Temperature 300 °C	EN min.; EN 10002-5
	142 MPa @Strain 0.2 %, Temperature 200 °C	EN min.; EN 10002-5
	142 MPa @Strain 1 %, Temperature 600 °C	EN min.; EN 10002-5
	152 MPa @Strain 1 %, Temperature 500 °C	EN min.; EN 10002-5
	162 MPa @Strain 1 %, Temperature 400 °C	EN min.; EN 10002-5
	162 MPa @Strain 0.2 %, Temperature 100 °C	EN min.; EN 10002-5
	172 MPa @Strain 1 %, Temperature 300 °C	EN min.; EN 10002-5
	181 MPa @Strain 1 %, Temperature 200 °C	EN min.; EN 10002-5
	201 MPa @Strain 1 %, Temperature 100 °C	EN min.; EN 10002-5
Elongation at Break	55 %	Outokumpu Typical, Hot Rolled Plate (Quarto); EN 10002-1
Rupture Strength	15.0 MPa @Temperature 800 °C, Time 3.60e+7 sec
	27.0 MPa @Temperature 750 °C, Time 3.60e+7 sec
	48.0 MPa @Temperature 700 °C, Time 3.60e+7 sec
	82.0 MPa @Temperature 650 °C, Time 3.60e+7 sec
	142 MPa @Temperature 600 °C, Time 3.60e+7 sec
Modulus of Elasticity	196 GPa	RT
	158 GPa @Temperature 500 °C

Electrical Properties	Original Value	Comments
Electrical Resistivity	0.0000740 ohm-cm	RT

Thermal Properties	Original Value	Comments
CTE, linear	18.4 µm/m-°C @Temperature 500 °C
	20.5 µm/m-°C @Temperature 1000 °C
Specific Heat Capacity	0.470 J/g-°C	RT
	0.530 J/g-°C @Temperature 500 °C
Thermal Conductivity	13.9 W/m-K	RT
	21.6 W/m-K @Temperature 500 °C
	27.5 W/m-K @Temperature 1000 °C
Maximum Service Temperature, Air	800 °C	Dry Air

Processing Properties	Original Value	Comments
Annealing Temperature	840 - 900 °C	Stress Relief Annealing (min. 0.5 h)
	1020 - 1120 °C	Solution Annealing

Component Elements Properties	Original Value	Comments
Carbon, C	0.050 %
Chromium, Cr	17.3 %
Iron, Fe	73.55 %
Nickel, Ni	9.1 %

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NOUTOK41 / 18756

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