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Alloy 625

information

Equivalent designations
UNS N06625
DIN W. Nr. 2.4856

Form	ASTM
Rod and bar	B 446
Plate, sheet and strip	B 443, B 906
Seamless pipe and tube	B 444, B 829
Welded pipe	B 705, B 775
Welded tube	B 704, B 751
Welding fitting	B 366
Billet and bar for reforging	B 472
Forging	B 564

Chemical composition

%	Ni	Cr	Mo	Fe	C	Mn	Si	P	S	Co	Nb+Ta	Al	Ti
min	58.0	20.0	8.0								3.15
max		23.0	10.0	5.0	0.10	0.50	0.50	0.015	0.015	1.00	4.15	0.40	0.40

Physical properties

Density	8.44 g/cm3
Melting range	1290-1350℃

Features: Inconel 625 has excellent strength at temperatures up to 816℃. At higher temperatures, its strength is generally lower than that of other solid solution strengthened alloys. Inconel 625 has good oxidation resistance at temperatures up to 980℃ and shows good resistance to aqueous corrosion, but is relatively moderate compared to other more capable corrosion resistant alloys.

Applications: Chemical process industry and sea water application. Inconel 625 is used in short term applications at temperatures up to 816℃. For long term service, it is best restricted to a maximum of 593℃, because long term exposure above 593℃ will result in significant embrittlement.

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