Chemical Composition

Grade Symbol	Elements	Composition %
Alloy 625	Nickel	58.0 minA
	Copper	-
	Iron	5.0 max
	Manganese	0.5 max
	Carbon	0.10 max
	Silicon	0.5 max
	Sulfur	0.015
	Chromium	20.0–23.0
	Aluminum	0.4 max
	Titanium	0.4 max
	Columbium(Nb) +tantalum	3.15–4.15
	Molybdenum	8.0–10.0
	Phosphorus	0.015 max
	Tungsten	-
	Cobalt, max	-
	Vanadium, max	-
	Nitrogen	-
	Boron	-
	Lanthanum	-
	Aluminum + Titanium	-
	Nickel + Molybdenum	-
	Columbium(Nb) max	-
	Tantalum	-
	Zirconium, max	-
	Cerium	-
	Yttrium	-

Mechanical Properties

Maximum Section Thickness, in. (mm)	Tensile Strength, min ksi [MPa]	Yield Strength, min ksi [MPa]	Elongation in 2 in. or 50 mm, min, %
Up to 4 (102), incl	120 (827)	60 (414)	30
Over 4B (102) to 10 (254),incl	110 (758)	50 (345)	25