Inconel 625 is composed primarily of nickel (58%), chromium (20-23%), molybdenum (8-10%), manganese (5%), and iron (3-5%). It also contains trace amounts of titanium, aluminum, cobalt, sulfur, and phosphorus. This combination of elements makes it resistant to oxidation and corrosion at high temperatures. Alloy 625 is a nickel-chromium alloy used for its high strength, excellent fabricability and outstanding corrosion resistance. Service temperatures can range from cryogenic to 980°C (1800°F). Alloy 625 strength is derived from the solid solution strengthening effect of molybdenium and niobium on its nickel-chromium matrix. Thus precipitation-hardening treatments are not required. This combination of elements also is responsible for superior resistance to a wide range of corrosive environments of unusual severity as well as to high-temperature effects such as oxidation and carburization. Inconel alloy 625 is a highly sought-after alloy due to its impressive mechanical properties. It has excellent fatigue strength, tensile strength, and a high degree of creep rupture under temperatures as high as 1500F. Furthermore, its stress corrosion cracking resistance and oxidation resistance make it suitable for many extreme applications. UNS N06625 also offers superior weldability and formability compared to many other similar materials – making it an ideal choice for parts that need to be deeply formed or complexly joined. All in all, Inconel 625 is an incredibly strong and versatile solution in the competitive world of metal alloys The behavior and chemical composition of this grade make it well suited for nuclear and aerospace applications.ASTM B444Alloy 625 (UNS N06625) Composition %

O.D	O.D Toleracne	W.T Tolerance
Inch	mm	%
1/8"	+0.08/-0	+/-10
1/4"	+/-0.10	+/-10
Up to 1/2"	+/-0.13	+/-15
1/2" to 1-1/2" , excl	+/-0.13	+/-10
1-1/2" to 3-1/2" , excl	+/-0.25	+/-10
Note: The tolerance can be negotiated according to the customer's specific requirements

C Carbon	Mn Manganese	Si Silicon	P Phosphorous	Cr Chromium	Nb+Ta Niobium-Tantalum	Co Cobalt	Mo Molybdenum	Fe lron	Al Aluminum	Ti Titanium	Ni Nickel
0.10 max	0.50 max	0.50 max	0.015 max	20.0-23.0	3.15-4.15	1.0 max	8.0-10.0	5.0 max	0.40 max	0.40 max	58.0 min

Maximum allowable pressure(unit: BAR)
Wall Thickness(mm)
		0.89	1.24	1.65	2.11	2.77	3.96	4.78
O.D(mm)	6.35	774	1125	1540
	9.53	497	713	982	1293
	12.7	366	521	712	937	1271
	19.05		339	459	597	806
	25.4		251	338	439	588	872	1080
	31.8			268	346	461	679	837
	38.1			222	286	381	558	685
	50.8			165	213	282	410	501

Mechanical Properties
Yield Strength	60 Ksi min
Tensile Strength	120 Ksi min
Elongation(2" min)	30%

The behavior and chemical composition of this grade make it well suited for nuclear and aerospace applications.