Comparison of Hastelloy C276 and Alloy B2 butt-welded pipe fittings

Hastelloy C276 offers broad, all-around corrosion resistance (oxidation/reduction, wet chlorine, etc.) and superior temperature resistance, while alloy B2 is particularly suitable for strongly reducing acidic environments such as HCl/H₂SO₄, but has poorer resistance to oxidizing conditions. Therefore, C276 is more suitable for various chemical processing, oil/gas, and pollution control, while B2 is suitable for specific heavy acid, low oxidant systems. Both can be provided as butt-welded pipe fittings.

Is Hastelloy C276 resistant to sulfuric acid corrosion?

C-276 alloy exhibits excellent resistance to sulfuric acid, hydrochloric acid, formic acid, acetic acid, chlorides, solvents, wet chloride gases, hypochlorites, and chlorine solutions. It also demonstrates excellent resistance to phosphoric acid corrosion at all temperatures below its boiling point and in phosphoric acid solutions with a concentration below 65%.

Hastelloy B-2 butt-welded pipe fittings are nickel-molybdenum alloy (Hastelloy B-2) pipe connections (such as elbows and tees) that use a butt-welded connection. Their core feature is achieving a seamless pipe connection through precision welding, fully utilizing the excellent corrosion resistance of Hastelloy B-2 alloy in reducing acid media (especially non-oxidizing acids such as hydrochloric acid and sulfuric acid) and high-temperature chloride environments. These fittings are specifically designed for piping systems in chemical, pharmaceutical, and pickling equipment that require handling strongly reducing acid media, ensuring the system's sealing and structural integrity in harsh corrosive environments. However, strict control of the welding process is necessary to prevent material embrittlement.

Hastelloy C-276 butt-welded pipe fittings are nickel-molybdenum-chromium-tungsten superalloy (Hastelloy C-276) pipe connections (such as elbows and tees) that utilize a butt-welded connection. Their core strength lies in achieving a seamless pipe connection through precision welding, fully leveraging the almost universal corrosion resistance of C-276 alloy. They effectively resist extreme media such as strong oxidizing and reducing acids, mixed acids, chlorides, and wet chlorine gas. These fittings are specifically designed for the most corrosive industrial piping systems in chemical, pharmaceutical, flue gas desulfurization, and marine engineering industries, ensuring reliable sealing and long-term corrosion resistance in harsh environments. They are key components for top-tier corrosion-resistant alloy pipe connections.

Specification of Hastelloy C276/B2 Buttweld Pipe Fittings

Specifications: ASTM B366 / ASME SB366

Standard : ASME/ANSI B16.9, ASME B16.28, MSS-SP-43

Size : 1/8" NB TO 48" NB. (Seamless & 100% X-Ray Welded, Fabricated)

Thickness : Sch 5s, Sch 10s, Sch 40s, Sch 80s, Sch 160s, Sch XXS

Bending Radius : R=1D, 2D, 3D, 5D, 6D, 8D, 10D or Custom

Type : Seamless / Welded / Fabricated

Items : Seamless & Welded Pipe Fittings, 45 Deg & 90 Deg Butt weld Elbow, Pipe Tee, Cross, Reducer, Pipe End Cap, Swage Nipple etc.

Grade : Hastelloy C22 / C276 / B2 UNS (N10276, N06022, N10665), DIN (2.4819, 2.4602, 2.4617)

Equivalent Grades of Hastelloy C276/B2 Butt weld Fittings

STANDARD	UNS	WNR.	JIS	GOST	EN	OR
Hastelloy C276	N10276	2.4819	NW 0276	ХН65МВУ	NiMo16Cr15W	ЭП760
Hastelloy B2	N10665	2.4617	-	-	-	-

Chemical Composition of Hastelloy C276/B2 Butt weld Fittings

Grade	C	Mn	Si	S	Co	Ni	Cr	Fe	Mo	P
C276	0.010 max	1.00 max	0.08 max	0.03 max	2.50 max	50.99 min*	14.50 – 16.50	4.00 – 7.00	15.00 – 17.00	0.04 max
B2	0.02 max	1.0 max	0.1 max	0.03 max	1.0 max	Bal	1.0 max	2.0 max	26 – 30	0.04 max

Mechanical properties of Hastelloy C276/B2 Butt weld Fittings

Element	Density	Melting Point	Tensile Strength	Yield Strength (0.2%Offset)	Elongation
Hastelloy C276	8.89 g/cm3	1370 °C (2500 °F)	Psi – 1,15,000 , MPa – 790	Psi – 52,000 , MPa – 355	40 %
Hastelloy B2	9.2 g/cm3	1370 °C (2500 ºF )	Psi – 1,10,000 , MPa – 760	Psi – 51000 , MPa – 350	40 %

Available types of Hastelloy C276/B2 pipe fittings

Hastelloy Alloy C276 Buttweld Elbow

Hastelloy Alloy B2 Buttweld Reducer

C276 Alloy Buttweld Tee

Alloy B2 Buttweld Cross

Hastelloy C276 Alloy Buttweld Stub End

Hastelloy B2 Alloy Buttweld Pipe Cap

Hastelloy B2 Buttweld Bend

Nickel C276 Seamless Fittings

B2 Welded Fittings

Hastelloy c276/b2 Buttweld Pipe Fittings Price Per Kg

Product	Price (FOB)
C276 Buttweld Fittings	US $1-5 / Piece
Hastelloy C276 Pipe Fitting	US $0.07 / Piece
Hastelloy Buttweld Fitting	US $0.01-3 / Piece
B2 Hastelloy Buttweld Fitting	US $0.1-0.2 / Piece
C276 Pipe Fittings	US $1-5 / Piece
ASTM B366 Hastelloy B2 Buttweld Pipe Fittings	USD $2.05 - 10.06 / Piece
Hastelloy Alloy B2 Equal Cross	USD $2.05 - 10.06 / Piece
ANSI B16.9 Hastelloy B2 Welded Tee	USD $2.05 - 10.06 / Piece

Hastelloy C276 Pipe Fittings Standard Weight Chart

DN	Schedule 10S			Schedule 40S
DN	Ecc reducer	Con reducer	Reducing tee	Con reducer	Reducing tee	Ecc reducer
400x300	18.35	18.35	51.71	36.70	87.54	36.70
25x15	0.12	0.12	0.25	0.15	0.26	0.15
20x15	0.10	0.10	0.11	0.14	0.15	0.14
25x20	0.13	0.13	0.25	0.16	0.27	0.16
32x25	0.18	0.18	0.45	0.22	0.53	0.22
32x20	0.18	0.18	0.44	0.22	0.52	0.22
40x20	0.18	0.18	0.58	0.24	0.74	0.24
40x32	0.24	0.21	0.61	0.28	0.77	0.28
40x25	0.19	0.19	0.60	0.26	0.76	0.26
50x25	0.28	0.28	0.73	0.40	1.10	0.40
50x40	0.31	0.31	0.76	0.45	1.15	0.45
50x32	0.30	0.30	0.74	0.44	1.13	0.44
65x40	0.44	0.44	1.24	0.76	1.94	0.76
80x40	0.51	0.51	1.52	0.94	2.85	0.94
65x50	0.47	0.47	1.25	0.80	1.98	0.80
80x50	0.55	0.55	1.56	1.00	2.91	1.00
100x40	0.68	0.68	2.90	1.36	4.53	1.36
80x65	0.59	0.59	1.59	1.08	2.98	1.08
100x50	0.78	0.78	2.94	1.57	4.48	1.57
100x80	0.87	0.87	3.04	1.74	4.64	1.74
100x65	0.83	0.83	2.97	1.66	4.54	1.66
125x100	1.49	1.49	5.49	2.98	8.47	2.98
150x100	1.96	1.96	7.10	4.07	9.68	4.07
150x80	1.82	1.82	6.86	3.98	11.94	3.98
150x125	2.00	2.00	7.27	4.07	9.99	4.07
200x150	3.19	3.19	14.08	6.94	18.82	6.94
250x100	4.73	4.73	22.75	10.52	30.07	10.52
200x100	3.01	3.01	13.46	6.55	17.98	6.55
250x150	5.00	5.00	23.55	11.12	31.13	11.12
250x200	5.20	5.20	24.08	11.56	31.84	11.56
300x250	7.98	7.98	35.52	16.63	55.79	16.63
400x200	16.70	16.70	49.90	33.40	84.82	33.40
350x300	15.29	15.29	43.96	30.58	71.21	30.58
400x250	17.22	17.22	50.80	35.43	85.73	35.43

Why Choose Gnee as Your Nickel-Based Alloy Supplier

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About Gnee Steel

Gnee Steel is a professional manufacturer of nickel-based alloys, including Nickel 201, Nickel 202, Hastelloy C-276, Hastelloy C-22, Hastelloy B, Hastelloy C-4, Inconel 600, Inconel 625, Inconel 718, Inconel X-750, Incoloy 800, Incoloy 800H/HT, Incoloy 825, Monel 400, Monel K500, and other high-temperature alloy materials. We specialize in the production and sales of alloy materials. Gnee Steel's products are widely used in aerospace, chemical, power generation, automotive, nuclear energy, and other fields, and we can provide customized alloy material solutions according to customer needs. For inquiries about alloy material prices or customized alloy material solutions, please feel free to contact us via email at ss@gneemetal.com for a quote.

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