Hastelloy C22 corresponds to the American standard material grade ASTM B564 UNS N06022. As a high-performance, highly corrosion-resistant material, it features excellent oxidation resistance, acid and alkali resistance, corrosion resistance, high-temperature performance, and good mechanical properties. Flanges forged from Hastelloy C22 as raw material exhibit exceptional corrosion resistance, capable of withstanding various strong acids, hydrochloric acid, hydrofluoric acid, and other highly acidic solutions, and exhibit exceptional corrosion resistance in acidic environments. Hastelloy C22 flanges also exhibit excellent heat resistance, enabling them to operate reliably in high-temperature environments for extended periods. Additionally, they feature superior mechanical properties, including high hardness, high compressive strength, and excellent wear resistance. As a result, they are widely used in various industries such as petrochemicals, chemicals, and power generation.

Hastelloy Flanges Standard Specification

Specifications	ASTM B564 / ASME SB564
Grades	Hastelloy C276, C22, C4, C2000, B2, B3, X Flanges
Standard	ANSI/ASME B16.5, B 16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, etc.
Size	1/2″ (15 NB) to 48″ (1200NB) DN10~DN5000
Class / Pressure	150#, 300#, 600#, 900#, 1500#, 2500#
Flange Face Type	Flate Face (FF), Raised Face (RF), Ring Type Joint (RTJ)

ASTM B564 UNS N06022 Hastelloy Flanges Chemical Composition

Hastelloy C22 contains approximately 56% nickel, along with chromium (20-22%), molybdenum (12-14%), tungsten (2.5-3.5%), and other elements, as well as small amounts of iron, cobalt, carbon, silicon, manganese, and other trace elements. This combination of elements gives it exceptional corrosion resistance.

CHEMICAL	LIMITS	Ni	Fe	Mn	C	Si	S	Cr	Mo	P	W	Co	V
Hastelloy C22	MIN	Balance	2					20	12.5		2.5
	MAX		6	0.5	0.02	0.08	0.02	22.5	14.5	0.02	3.5	2.5	0.35

Mechanical Property of Hastelloy Alloy C22 Flange

In terms of mechanical properties, Hastelloy C22 flanges offer excellent strength and toughness. At room temperature, the tensile strength can reach over 690 MPa, with a yield strength of approximately 310 MPa and an elongation rate exceeding 40%. They can withstand high operating pressures and temperatures, capable of stable operation in environments up to approximately 1093°C. Additionally, after being processed through forging, rolling, and other manufacturing processes, it achieves high dimensional accuracy and precision in seal surface machining, making it compatible with various flange connection standards (such as ANSI, DIN, JIS, etc.), ensuring the integrity and safety of pipeline systems.

Element	Density	Melting Point	Tensile Strength	Yield Strength (0.2%Offset)	Elongation
Hastelloy C22	8.69 g/cm3	1399 °C (2550 °F)	Psi – 1,00,000 , MPa – 690	Psi – 45000 , MPa – 310	45%

Equivalent Material of C22 Hastelloy Flange

STANDARD	WERKSTOFF NR.	UNS	JIS	GOST	EN	OR
Hastelloy C22	2.4602	N06022	NW 6022	–	NiCr21Mo14W	–

Corrosion Resistance

Hastelloy C22 alloy exhibits exceptional corrosion resistance, particularly in harsh acidic and chlorine-containing environments. It demonstrates extremely high resistance to pitting and crevice corrosion. Experimental results show that the critical pitting temperature of C-22 in a 6% FeCl₃ solution with added acid exceeds 302°F (150°C), significantly outperforming common stainless steels and certain other nickel alloys. Additionally, it exhibits outstanding corrosion resistance against organic acids and strong oxidizing acids. According to available data, C22 alloy is rated as one of the top corrosion-resistant materials, capable of withstanding pitting corrosion, crevice corrosion, stress corrosion cracking, and crevice corrosion in seawater environments. These properties make it superior to many commonly used nickel alloys in various harsh corrosive media, such as FeCl₃, CuCl₂, moist chlorine atmospheres, and seawater.

Common Types of Hastelloy C276 Flanges

Flange Type	Features / Description
Weld Neck Flange	Suitable for high-pressure, high-temperature systems; provides strong and secure connection
Slip On Flange	Easy to install; suitable for medium and low pressure applications
Blind Flange	Used to close the end of a pipe; ideal for inspection and maintenance
Socket Weld Flange	Suitable for small-diameter, high-pressure pipelines
Threaded Flange	Ideal for systems where welding is not feasible
Lap Joint Flange	Works with stub ends; allows easy alignment and disassembly, suitable for systems requiring frequent maintenance

Hastelloy C22 Flanges Dimension

Nominal Pipe Size, NPS	Outside Diameter of Flange, O	Minimum Thickness of Flange, tf [Notes (2)-(4)]	Minimum Thickness Lap Joint, tf	Diameter of Hub, X	Hub Diameter Beginning of Chamfer Welding Neck, Ah [Note (5)]	Length Through Hub			Bore
						Threaded/ Slip-on/ Socket Welding,              Y	Lapped,           Y	Welding Neck, Y	Minimum Slip-on/ Socket      Welding,                 B	Minimum Lapped, B
1/2	90	9.6	11.2	30	21.3	14	16	46	22.2	22.9
3/4	100	11.2	12.7	38	26.7	14	16	51	27.7	28.2
1	110	12.7	14.3	49	33.4	16	17	54	34.5	34.9
1 1/4	115	14.3	15.9	59	42.2	19	21	56	43.2	43.7
1 1/2	125	15.9	17.5	65	48.3	21	22	60	49.5	50.0
2	150	17.5	19.1	78	60.3	24	25	62	61.9	62.5
2 1/2	180	20.7	22.3	90	73.0	27	29	68	74.6	75.4
3	190	22.3	23.9	108	88.9	29	30	68	90.7	91.4
3 1/2	215	22.3	23.9	122	101.6	30	32	70	103.4	104.1
4	230	22.3	23.9	135	114.3	32	33	75	116.1	116.8
5	255	22.3	23.9	164	141.3	35	36	87	143.8	144.4
6	280	23.9	25.4	192	168.3	38	40	87	170.7	171.4
8	345	27.0	28.6	246	219.1	43	44	100	221.5	222.2
10	405	28.6	30.2	305	273.0	48	49	100	276.2	277.4
12	485	30.2	31.8	365	323.8	54	56	113	327.0	328.2
14	535	33.4	35.0	400	355.6	56	57	125	359.2	360.2
16	595	35.0	36.6	457	406.4	62	64	125	410.5	411.2
18	635	38.1	39.7	505	457.0	67	68	138	461.8	462.3
20	700	41.3	42.9	559	508.0	71	73	143	513.1	514.4
24	815	46.1	47.7	663	610.0	81	83	151	616.0	616.0

Hastelloy C22 VS Hastelloy C276

Hastelloy C22 flanges and Hastelloy C276 flanges are both high-performance nickel-based alloys, but they differ in their chemical composition and performance in specific corrosive environments. In summary, Hastelloy C22 has a higher chromium content, making it generally more resistant to strong oxidizing media  and localized corrosion than C276, particularly in the heat-affected zone of welds. Hastelloy C276, on the other hand, contains higher levels of molybdenum and tungsten, making it more effective in highly reducing media  and under high-temperature conditions.

You can get an offer for products in below material forms:

-Pipe and Tube (EN 10216-5, ASTM A213, ASTM A249, A312, A790,)

-Forged Fitting and Flange (ASTM A182 , ASTM A105,ASTM B564 )

-Butt Weld Fittings (ASTM A234, ASTM A403,ASTM A815)

-Round bar , Billet (ASTM A276, ASTM A479)

– Plate, Sheet, Strip(ASTM A240, EN 10028-7, A480)

-Bolting, Nuts（ASTM A193, A194, A320）

 Hastelloy C22 Flanges Exported Countries

We Export  Hastelloy C22 Flanges to Saudi Arabia, United Arab Emirates, Qatar, Bahrain, Oman, Kuwait, Turkey, Egypt, Yemen , Syria, Jordan, Cyprus, Singapore, Malaysia, Indonesia, Thailand, Vietnam, South Korea, Japan, Sri Lanka, Maldives, Bangladesh, Cambodia, Argentina, Bolivia, Brazil, Venezuela, Colombia, Ecuador, Guyana, Paraguay, Uruguay, United States Of America, Canada, Mexico, Panama, Jamaica, Bahamas, Denmark, Norway, Germany, France,Italy, United Kingdom, Spain, Belgium, Greece, Czech Republic, Portugal, Hungary, Albania, Austria, Finland, Ireland, Croatia, Malta, Nigeria, Algeria, Angola, South Africa, Libya, Egypt, Sudan, Europe, Africa, Asia, North America, South America, Middle East.etc