Haynes 625SQ® Nickel Alloy Sheet

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Haynes 625SQ® Nickel Alloy Sheet
Categories:	Metal; Nonferrous Metal; Nickel Alloy
Material Notes:	Haynes 625SQ alloy is a solid-solution strengthened superalloy. It is a modification of Haynes 625 alloy designed to enhance resistance to fatigue at temperatures up to approximately 1200°F (649°C). The alloy composition is tightly controlled to very low levels of carbon, silicon, and nitrogen. Primary melting is by vacuum induction melting, followed by consumable electrode practice using electroslag remelting. During processing, the grain size is controlled to ASTM #5 or finer. Haynes 625SQ alloy sheet and strip meet the requirements of AMS 5879 and AMS 5599 specifications. Haynes 625SQ alloy is readily fabricated and welded using practices common to Haynes 625 alloy. Haynes 625SQ alloy sheet and strip find application in aerospace, automotive, and chemical process industry bellows, expansion joints, and fabrications where fatigue resistance, strength, and corrosion resistance are required. Data provided by the manufacturer, Haynes International, Inc.
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Physical Properties	Original Value	Comments

Density	8.44 g/cc

Mechanical Properties	Original Value	Comments
Tensile Strength, Ultimate	497 MPa @Temperature 760 °C	AMS 5879
	646 MPa @Temperature 705 °C	AMS 5879
	776 MPa @Temperature 425 °C	AMS 5879
	776 MPa @Temperature 540 °C	AMS 5879
	787 MPa @Temperature 650 °C	AMS 5879
	809 MPa @Temperature 315 °C	AMS 5879
	895 MPa @Temperature 25.0 °C	AMS 5879
Tensile Strength, Yield	306 MPa @Strain 0.2 %, Temperature 705 °C	AMS 5879
	323 MPa @Strain 0.2 %, Temperature 650 °C	AMS 5879
	339 MPa @Strain 0.2 %, Temperature 425 °C	AMS 5879
	344 MPa @Strain 0.2 %, Temperature 540 °C	AMS 5879
	353 MPa @Strain 0.2 %, Temperature 315 °C	AMS 5879
	452 MPa @Strain 0.2 %, Temperature 25.0 °C	AMS 5879
	3223 MPa @Strain 0.2 %, Temperature 760 °C	AMS 5879
Elongation at Break	51.7 % @Temperature 25.0 °C	2-inch (51 mm) sample; AMS 5879
	60.9 % @Temperature 425 °C	2-inch (51 mm) sample; AMS 5879
	64.1 % @Temperature 315 °C	2-inch (51 mm) sample; AMS 5879
	81.4 % @Temperature 650 °C	2-inch (51 mm) sample; AMS 5879
	88.8 % @Temperature 760 °C	2-inch (51 mm) sample; AMS 5879
	90.5 % @Temperature 540 °C	2-inch (51 mm) sample; AMS 5879
	103.9 % @Temperature 705 °C	2-inch (51 mm) sample; AMS 5879
Modulus of Elasticity	126 GPa @Temperature 1000 °C	Dynamic
	142 GPa @Temperature 900 °C	Dynamic
	153 GPa @Temperature 800 °C	Dynamic
	163 GPa @Temperature 700 °C	Dynamic
	171 GPa @Temperature 600 °C	Dynamic
	186 GPa @Temperature 400 °C	Dynamic
	199 GPa @Temperature 200 °C	Dynamic
	208 GPa @Temperature 20.0 °C	Dynamic

Electrical Properties	Original Value	Comments
Electrical Resistivity	0.000134 ohm-cm @Temperature 200 °C
	0.0001348 ohm-cm @Temperature 1000 °C
	0.0001356 ohm-cm @Temperature 400 °C
	0.0001356 ohm-cm @Temperature 900 °C
	0.0001365 ohm-cm @Temperature 800 °C
	0.0001375 ohm-cm @Temperature 700 °C
	0.0001379 ohm-cm @Temperature 600 °C

Thermal Properties	Original Value	Comments
CTE, linear	14.2 µm/m-°C @Temperature 20.0 - 500 °C
	14.8 µm/m-°C @Temperature 20.0 - 600 °C
	15.4 µm/m-°C @Temperature 20.0 - 700 °C
	16.1 µm/m-°C @Temperature 20.0 - 800 °C
	16.8 µm/m-°C @Temperature 20.0 - 900 °C
	17.4 µm/m-°C @Temperature 20.0 - 1000 °C
Thermal Conductivity	15.3 W/m-K @Temperature 400 °C
	18.3 W/m-K @Temperature 600 °C
	19.8 W/m-K @Temperature 700 °C
	21.5 W/m-K @Temperature 800 °C
	23.4 W/m-K @Temperature 900 °C
	25.6 W/m-K @Temperature 1000 °C
Melting Point	1290 - 1350 °C
Solidus	1290 °C
Liquidus	<= 1350 °C

Processing Properties	Original Value	Comments
Annealing Temperature	>= 1600 °F	Bright Anneal; AMS 5879

Component Elements Properties	Original Value	Comments
Aluminum, Al	<= 0.40 %
Carbon, C	<= 0.030 %
Cb + Ta	3.7 %
Chromium, Cr	21 %
Cobalt, Co	<= 1.0 %
Iron, Fe	<= 5.0 %
Manganese, Mn	<= 0.50 %
Molybdenum, Mo	9.0 %
Nickel, Ni	>= 62 %	as balance
Nitrogen, N	<= 0.020 %
Silicon, Si	<= 0.15 %
Titanium, Ti	<= 0.40 %

Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistent format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's terms of use regarding this information. Click here to go back to viewing the property data in MatWeb's normal format.

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