Sandvik Sanicro 31HT Seamless tube and pipe

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Sandvik Sanicro 31HT Seamless tube and pipe
Categories:	Metal; Ferrous Metal; Austenitic; Superalloy
Material Notes:	Sandvik Sanicro 31HT is an austenitic nickel-iron-chromium alloy characterized by: high creep strength very good resistance to oxidation good resistance to combustion gases very good resistance to carburization good resistance to nitrogen absorption good structural stability at high temperatures good weldability Sandvik Sanicro 31HT can be used at temperatures up to about 1100°C (2010°F). In order to have the best ductility, it should be used above 700 °C (1290 °F). We can also supply a modified version of Sandvik Sanicro 31HT for use in the temperature range between about 550 and 700°C (1020-1290°F). The chemical composition and heat treatment of this version have been adapted for the highest possible creep ductility. Further information on properties is available on request. Sandvik Sanicro 31HT is not generally used under wet corrosive conditions. For this type of environment, manufacturer recommends Sandvik Sanicro 30, which is specially adapted for wet corrosive conditions up to about 550°C (1020°F). Information provided by Sandvik UNS N08811, N08810; EN 1.4959
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Physical Properties	Original Value	Comments

Density	7.90 g/cc

Mechanical Properties	Original Value	Comments
Hardness, Rockwell B	<= 90
Tensile Strength, Ultimate	500 - 700 MPa
	>= 345 MPa @Temperature 600 °C
	>= 385 MPa @Temperature 200 °C
Tensile Strength, Yield	>= 172 MPa @Strain 0.2 %
	>= 200 MPa @Strain 1 %
	>= 95.0 MPa @Strain 0.2 %, Temperature 600 °C
	>= 115 MPa @Strain 1 %, Temperature 600 °C
	>= 130 MPa @Strain 0.2 %, Temperature 200 °C
	>= 155 MPa @Strain 1 %, Temperature 200 °C
Elongation at Break	>= 35 %
	>= 30 % @Thickness 50.8 mm
Rupture Strength	2.70 MPa @Temperature 1100 °C, Time 3.60e+8 sec
	13.0 MPa @Temperature 900 °C, Time 3.60e+8 sec
	57.0 MPa @Temperature 700 °C, Time 3.60e+8 sec
	127 MPa @Temperature 600 °C, Time 3.60e+8 sec
Modulus of Elasticity	200 GPa
	130 GPa @Temperature 1000 °C
	175 GPa @Temperature 400 °C

Electrical Properties	Original Value	Comments
Electrical Resistivity	0.0000124 ohm-cm @Temperature 1000 °C
	0.0000990 ohm-cm @Temperature 20.0 °C
	0.000118 ohm-cm @Temperature 600 °C

Thermal Properties	Original Value	Comments
CTE, linear	15.0 µm/m-°C @Temperature 30.0 - 100 °C
	16.0 µm/m-°C @Temperature 30.0 - 200 °C
	17.0 µm/m-°C @Temperature 30.0 - 500 °C
	18.5 µm/m-°C @Temperature 30.0 - 1000 °C
Specific Heat Capacity	0.470 J/g-°C @Temperature 20.0 °C
	0.520 J/g-°C @Temperature 200 °C
	0.585 J/g-°C @Temperature 400 °C
	0.605 J/g-°C @Temperature 600 °C
	0.630 J/g-°C @Temperature 800 °C
	0.665 J/g-°C @Temperature 1100 °C
Thermal Conductivity	12.0 W/m-K @Temperature 20.0 °C
	16.0 W/m-K @Temperature 200 °C
	19.0 W/m-K @Temperature 400 °C
	22.0 W/m-K @Temperature 600 °C
	29.0 W/m-K @Temperature 1100 °C

Component Elements Properties	Original Value	Comments
Aluminum, Al	0.50 %
Carbon, C	0.070 %
Chromium, Cr	20.5 %
Iron, Fe	46.7 %	As Balance
Manganese, Mn	0.60 %
Nickel, Ni	30.5 %
Phosphorus, P	<= 0.015 %
Silicon, Si	0.60 %
Sulfur, S	<= 0.010 %
Titanium, Ti	0.50 %

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NSANDV254 / 19148

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