hastelloy

Material Range

HASTEALLOY

HASTELLOY C-276 alloy (UNS N10276) was the first wrought, nickel-chromiummolybdenum material to alleviate concerns over welding (by virtue of extremely low carbon and silicon contents). As such, it was widely accepted in the chemical process and associated industries, and now has a 50-year-old track record of proven performance in a vast number of corrosive chemicals. Like other nickel alloys, it is ductile, easy to form and weld, and possesses exceptional resistance to stress corrosion cracking in chloride-bearing solutions (a form of degradation to which the austenitic stainless steels are prone).

With its high chromium and molybdenum contents, it is able to withstand both oxidizing and non-oxidizing acids, and exhibits outstanding resistance to pitting and crevice attack in the presence of chlorides and other halides. Furthermore, it is very resistant to sulfide stress cracking and stress corrosion cracking in sour, oilfield environments.

Grades

HASTEALLOY B-3 ALLOY

Same excellent resistance to hydrochloric acid and other strongly reducing chemicals as B-2 alloy, but with significantly better thermal stability, fabricability and stress corrosion cracking resistance.

CHEMICAL COMPOSITION

Element	Ni	Mo	Fe	C	Co	Cr	Mn	Si	Ti	W	Al	Cu
Content	65.0 min	28.5	1.5	0.1 max	3.0 max	1.5	3.0 max	0.10 max	0.20 max	3.0 max	0.50 max	0.20 max

HASTEALLOY B-2 ALLOY

Hastelloy B2 is a solid solution strengthened, nickel-molybdenum alloy, with significant resistance to reducing environments like hydrogen chloride gas, and sulfuric, acetic and phosphoric acids. Molybdenum is the primary alloying element which provides significant corrosion resistance to reducing environments.

CHEMICAL COMPOSITION

Element	Ni	Mo	Fe	C	Co	Cr	Mn	Si	P	S
Content	Balance	26.0-30.0	2.0 max	0.02 max	1.0 max	1.0 max	1.0 max	0.10 max	0.040 max	0.030 max

HASTEALLOY C-22 ALLOY

Better overall corrosion resistance in oxidizing corrosives than C-4, C-276 and 625 alloys. Outstanding resistance to localized corrosion and excellent resistance to stress corrosion cracking. Best alloy to use as universal weld filler metal to resist corrosion of weldments.

CHEMICAL COMPOSITION

Element	C	Cr	Co	Fe	Mn	Mo	Ni	P	Si	S	W	V
Content	0.010 max	20-22.5	2.5 max	2.0-6.0	0.50 max	12.5-14.5	Balance	0.02 max	0.08 max	0.02 max	2.5-3.5	0.35 max

HASTEALLOY C-276 ALLOY

Versatile, corrosion resistant alloy. Very good resistance to reducing, and mildly oxidizing corrosives. Excellent stress corrosion cracking resistance with very good resistance to localized attack.

CHEMICAL COMPOSITION

Element	Ni	Mo	Cr	Fe	W	Co	Mn	C	V	P	S	Si
Content	Remainer	15.0-17.0	14.5-16.5	4.0-7.0	3.0-4.5	2.5 max	1.0 max	0.01 max	0.35 max	0.04 max	0.03 max	0.08 max

HASTEALLOY X

Hastelloy X is a nickel-chromium-iron-molybdenum superalloy with outstanding high temperature strength, oxidation resistance, and fabricability. Alloy X’s oxidation resistance is excellent up to 2200° F. This nickel steel alloy has also been found to be exceptionally resistant to stress-corrosion cracking in petrochemical applications.

CHEMICAL COMPOSITION

Element	Ni	Mo	Cr	Fe	W	Co	Mn	C	P	S	Si	Al	Ti	B	Cu
Content	Remainder	8.0-10.0	20.5-23.0	17.0-20.0	0.2-1.0	0.5-2.5	1.0 max	0.05-0.15	0.04 max	0.03 max	1.0 max	0.50 max	0.15 max	0.01 max	0.50 max