Sandvik Springflex Spring Wire

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Sandvik Springflex Spring Wire
Categories:	Metal; Ferrous Metal; Austenitic; Ferritic; Stainless Steel
Material Notes:	Sandvik Springflex is a duplex (austenitic-ferritic) stainless steel characterized by: Very good fatigue resistance High resistance to stress corrosion cracking (SCC) in chloride-bearing environments High resistance to stress corrosion cracking (SCC) in environments containing hydrogen sulphide High resistance to general corrosion, pitting, and crevice corrosion High resistance to erosion corrosion and corrosion fatigue Physical properties that offer design advantages Service temperature: -100 to 300°C (-150 to 570°F) Information provided by Sandvik
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Physical Properties	Original Value	Comments

Density	7.80 g/cc

Mechanical Properties	Original Value	Comments
Tensile Strength, Ultimate	700 - 900 MPa	Annealed wire
	900 - 1800 MPa	Flat wire
	1350 - 1550 MPa @Diameter 5.00 - 8.00 mm
	1450 - 1650 MPa @Diameter 3.50 - 5.00 mm
	1550 - 1750 MPa @Diameter 2.00 - 3.50 mm
	1700 - 1900 MPa @Diameter 1.25 - 2.00 mm
	1800 - 2000 MPa @Diameter 0.800 - 1.25 mm
	1900 - 2100 MPa @Diameter 0.500 - 0.800 mm
	2000 - 2200 MPa @Diameter 0.300 - 0.500 mm
	2100 - 2300 MPa @Diameter 0.200 - 0.300 mm
	2150 - 2350 MPa @Diameter 0.150 - 0.200 mm
Tensile Strength, Yield	350 - 550 MPa @Strain 0.2 %	Annealed wire
	765 - 1530 MPa @Strain 0.2 %	Flat wire
	1135 - 1335 MPa @Diameter 5.00 - 8.00 mm, Strain 0.2 %
	1220 - 1420 MPa @Diameter 3.50 - 5.00 mm, Strain 0.2 %
	1305 - 1505 MPa @Diameter 2.00 - 3.50 mm, Strain 0.2 %
	1430 - 1630 MPa @Diameter 1.25 - 2.00 mm, Strain 0.2 %
	1515 - 1715 MPa @Diameter 0.800 - 1.25 mm, Strain 0.2 %
	1600 - 1800 MPa @Diameter 0.500 - 0.800 mm, Strain 0.2 %
	1685 - 1885 MPa @Diameter 0.300 - 0.500 mm, Strain 0.2 %
	1770 - 1970 MPa @Diameter 0.200 - 0.300 mm, Strain 0.2 %
	1815 - 2015 MPa @Diameter 0.150 - 0.200 mm, Strain 0.2 %
Modulus of Elasticity	200 GPa	as delivered
	205 GPa	tempered
Poissons Ratio	0.30	as delivered; Calculated
	0.30	Tempered; Calculated
Shear Modulus	77.0 GPa	as delivered
	79.0 GPa	tempered

Electrical Properties	Original Value	Comments
Electrical Resistivity	0.00000840 ohm-cm @Temperature 20.0 - 100 °C

Thermal Properties	Original Value	Comments
CTE, linear	11.5 µm/m-°C @Temperature 30.0 - 200 °C	Cold worked
	11.5 µm/m-°C @Temperature 30.0 - 300 °C	Cold worked
	12.0 µm/m-°C @Temperature 30.0 - 400 °C	Cold worked
	12.5 µm/m-°C @Temperature 30.0 - 100 °C	Cold worked
	13.0 µm/m-°C @Temperature 30.0 - 100 °C	Aged
	13.5 µm/m-°C @Temperature 30.0 - 200 °C	Aged
	13.5 µm/m-°C @Temperature 30.0 - 300 °C	Aged
	14.0 µm/m-°C @Temperature 30.0 - 400 °C	Aged
Specific Heat Capacity	0.500 J/g-°C @Temperature 50.0 - 100 °C
Thermal Conductivity	14.0 W/m-K @Temperature 20.0 °C
	16.0 W/m-K @Temperature 100 °C
	17.0 W/m-K @Temperature 200 °C
	19.0 W/m-K @Temperature 300 °C
Maximum Service Temperature, Air	300 °C
Minimum Service Temperature, Air	-100 °C

Component Elements Properties	Original Value	Comments
Carbon, C	<= 0.030 %
Chromium, Cr	22 %
Manganese, Mn	0.90 %
Molybdenum, Mo	3.2 %
Nickel, Ni	5.0 %
Nitrogen, N	0.18 %
Phosphorus, P	<= 0.030 %
Silicon, Si	0.50 %
Sulfur, S	<= 0.015 %

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NSANDV5232 / 199796

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