HAYNES^® 625 alloy is similar to the solid-solution-strengthened superalloys, such as HAYNES 188 alloy or HASTELLOY^® X alloy, which will precipitate deleterious phases upon long-term exposure at intermediate temperatures. In this case, the phase in question is Ni₃Cb delta- phase which serves to impair both tensile ductility and impact strength. For applications where thermal stability is important, HAYNES 230^® alloy is recommended.

Room Temperature Properties After Thermal Exposure (Plate)

Exposure Temperature		Hours	Ultimate Tensile Strength		Yield Strength at 0.2% Offset		Elongation in 2 in. (50.8 mm)	Impact Strength
°F	°C	Hours	Ksi	MPa	Ksi	MPa	%	ft.-lb.	Joules

As-Annealed*			127.7	880	66.2	455	46	81	110

1200	650	1000	165.0	1140	122.3	845	28	11	15
		4000	163.6	1130	117.9	815	24	8	11
		8000	164.2	1130	117.8	810	18	5	7
		16000	165.4	1140	118.5	815	12	4	5

1400	760	1000	142.9	985	95.5	660	17	5	7
		4000	145.5	1005	104.1	720	12	4	5
		8000	142.6	985	97.4	670	13	5	7
		16000	140.4	970	96.1	665	12	4	5

1600	870	1000	130.0	895	68.3	470	30	12	16
		4000	130.0	895	66.4	460	29	11	15
		8000	127.0	875	63.7	440	26	15	20
		16000	128.4	885	63.4	435	32	14	19

^{* 1875°F (1025°C), rapid cooled}

Haynes International, Inc. 800-354-0806 765-456-6012

HAYNES® 625 alloy Information

A Ni-Cr-Mo-Cb alloy with excellent strength to 1500°F (816°C), good oxidation resistance, and good resistance to aqueous corrosion.

HAYNES^® 625 alloy Information