Hastelloy C276 Buttweld Fittings

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Table of Content

Hastelloy C276 Buttweld Fittings Specifications
Hastelloy C276 Buttweld Pipe Fittings Chemical Composition
Hastelloy C276 Buttweld Fittings Mechanical Properties
Equivalent Grades for C276 Hastelloy Buttweld Fitting
Types of Hastelloy C276 Buttweld Fittings
Hastelloy C276 Buttweld Fittings Product Matrix
Why Choose Kalpataru Piping Solutions For Buying Hastelloy C276 Buttweld Fittings
Frequently Asked Questions FAQ Hastelloy C276 Buttweld Fittings
Related Products

Kalpataru Piping Solutions is one of the leading manufacturers, suppliers, exporters and stockists of quality Hastelloy C276 Buttweld Fittings. Kalpataru Piping Solutions supplies whole range of Hastelloy C276 Buttweld Fittings as seamless, welded and erw. We have made these with superior quality raw materials. Hastelloy C276 Buttweld Fittings are used in various application industries.

Our state-of-the-art manufacturing facility at Kalpataru Piping Solutions has the latest equipment to produce a variety of industrial Hastelloy C276 Buttweld Fittings. We use only high-quality raw materials and carefully control the composition of these fittings to achieve optimum stability and performance. Our production plant has highly skilled professionals who are committed to manufacturing superior Hastelloy C276 Buttweld Fittings.

With strict manufacturing guidelines, we closely monitor the entire manufacturing process to achieve the highest precision in producing these fittings. Our manufactured Hastelloy C276 Buttweld Fittings have superior mechanical properties and are in compliance with all the specifications, offering a perfect fit for our client. We conduct various destructive and non-destructive tests on these fittings to ensure full client satisfaction.

To make it easier for our clients, we supply these top-quality Alloy C276 Buttweld Fittings with packaging. We pack the fittings with appropriate materials to avoid any possible damage. Our professional shipping team also provides all the required documents to our clients in a timely and safe manner ensuring a hassle-free shipping process.

Kalpataru Piping Solutions export, Supply & Manufacture Hastelloy C276 Buttweld Fitting in forms like seamless, welded, fabricated, etc.

Hastelloy C276 Buttweld Fittings Specifications

Specifications		Details
Specifications	:	ASTM B366 / ASME SB366
Size	:	Seamless Butt Weld Fittings: 1/2″ – 10″, Welded Butt Weld Fittings: 1/2″ – 48″
Standards	:	ASME/ANSI B16.9, ASME B16.28, MSS-SP-43
Thickness	:	5s, 10s, 40s, 80s, 10, 20, 40, STD, 60, 80, XS, 100, 120, 140, 160, XXS available with NACE MR 01-75
Type	:	Seamless / Welded / Fabricated

Hastelloy C276 Buttweld Pipe Fittings Chemical Composition

Hastelloy C276	Ni	C	Mo	Mn	Si	Fe	P	S	Co	Cr
Balance	0.01 max	15–17	1.0 max	0.08 max	4–7	0.04 max	0.03 max	2.5 max	14.5–16.5

Hastelloy C276 Buttweld Fittings Mechanical Properties

Density	Melting Point	Yield Strength (0.2% Offset)	Tensile Strength	Elongation
8.89 g/cm³	1370 °C (2500 °F)	Psi – 52,000 \| MPa – 355	Psi – 1,15,000 \| MPa – 790	40 %

Equivalent Grades for C276 Hastelloy Buttweld Fitting

STANDARD	UNS	WERKSTOFF NR.	AFNOR	EN	JIS	OR	GOST
Hastelloy C276	N10276	2.4819	–	NiMo16Cr15W	NW 0276	ЭП760	ХН65МВУ

Types of Hastelloy C276 Buttweld Fittings

SS Hastelloy Elbow, Size 3 inch-10 inch

Hastelloy Pipe Fittings, Size 2 inch

Hastelloy Hydraulic Pipe Fittings, Size 1/2 inch

Hastelloy C276 90 degree 45 degree Long Radius Elbow

Hastelloy C276 90° & 45° Long Radius Elbow

Hastelloy C-276 Fittings, Size 3/4 & 2 inch

Hastelloy 45 Deg Elbow Threaded, Size 2 inch-3 inch

Grade C276 Hastelloy Seamless Buttweld Fittings

C276 Hastelloy Street Elbow, 1/2 to 48 inch

Alloy C276 90 degree long radius elbow r=1.5d ASME B16.9

Alloy C276 90° Long Radius Elbow ASME B16.9

Alloy C-276 N10276 socket welding threaded half full coupling B16.11

Alloy C-276 N10276 Socket Welding Threaded Coupling

2-5mm Hastelloy C276 Elbow Fittings

1.5 to 5 inch Hastelloy C276 Pipe Fittings

Hastelloy C276 Buttweld Fittings Product Matrix (ASTM B366 UNS N10276)

The table below covers the full range of ASME B16.9 and ASME B16.28 Hastelloy C276 fittings supplied by Kalpataru Piping. Sizes range from 1/2″ NB to 24″ NB across schedule classes Sch 5S through XXS (Schedule 5S, 10S, 40S, 80S, 10, 20, 40, STD, 60, 80, XS, 100, 120, 140, 160, XXS).

Fitting Type	Sub-Type / Configuration	Bend Radius / Standard	Size Range (NB)
Hastelloy C276 Elbow (90 deg)	Long Radius (LR) – 1.5D	ASME B16.9	1/2″ – 24″
Hastelloy C276 Elbow (90 deg)	Short Radius (SR) – 1D	ASME B16.28	1/2″ – 24″
Hastelloy C276 Elbow (45 deg)	Long Radius (LR) – 1.5D	ASME B16.9	1/2″ – 24″
Hastelloy C276 Elbow (180 deg Return)	Long Radius (LR)	ASME B16.9	1/2″ – 24″
Hastelloy C276 Equal Tee	All outlets equal	ASME B16.9	1/2″ – 24″
Hastelloy C276 Reducing Tee	Branch smaller than run	ASME B16.9	3/4″ – 24″
Hastelloy C276 Concentric Reducer	Concentric	ASME B16.9	3/4″ – 24″
Hastelloy C276 Eccentric Reducer	Eccentric (flat bottom / flat top)	ASME B16.9	3/4″ – 24″
Hastelloy C276 Stub End	Type A (long pattern)	MSS-SP-43 / ASME B16.9	1/2″ – 24″
Hastelloy C276 Stub End	Type B (short pattern)	MSS-SP-43 / ASME B16.9	1/2″ – 24″
Hastelloy C276 Pipe Cap	Dished end cap	ASME B16.9	1/2″ – 24″
Hastelloy C276 Equal Cross	Four-way equal	ASME B16.9	1/2″ – 12″
Hastelloy C276 Reducing Cross	Four-way reducing	ASME B16.9	1″ – 12″
Hastelloy C276 Long Radius Bend	3D / 5D / custom	ASME B16.9 / MSS-SP-43	1/2″ – 24″

Hastelloy C276 Elbow (ASTM B366 UNS N10276)

Kalpataru Piping stocks and supplies Hastelloy C276 Elbow fittings manufactured to ASTM B366 / ASME SB366 in grade designation WP-HC276. Available configurations include the 90 degree Long Radius (LR) elbow to ASME B16.9 with a 1.5D centre-to-face dimension, the 90 degree Short Radius (SR) elbow to ASME B16.28 with a 1D centre-to-face, the 45 degree LR elbow to ASME B16.9, and the 180 degree return bend in both LR and SR patterns. Sizes span 1/2″ NB to 24″ NB across schedule classes Sch 5S through XXS. For projects requiring custom bend geometry, Kalpataru Piping also supplies 3D and 5D bends in Hastelloy UNS N10276. Buyers sourcing elbows alongside matching pipe may refer to Hastelloy C276 Seamless Pipes and Tubes for the pipe spool.

Hastelloy C276 Tee (Equal and Reducing) ASTM B366

Hastelloy C276 Tees conform to ASTM B366 UNS N10276 and are dimensioned to ASME B16.9. Kalpataru Piping supplies both the Equal Tee (all three outlets in the same nominal bore) and the Reducing Tee (branch bore smaller than the run bore) in seamless and welded construction. The WP-HC276 grade designation confirms compliance with the ASME pressure piping code. Tees are available in sizes from 1/2″ NB to 24″ NB and in schedule classes Sch 5S through XXS. For instrumented branch connections, buyers may also consider Hastelloy C276 Forged Fittings (B16.11) which cover socket weld and threaded olets and tees.

Hastelloy C276 Reducer (Concentric and Eccentric) ASTM B366

Reducers in Hastelloy C276 are manufactured per ASTM B366 and dimensioned to ASME B16.9. Kalpataru Piping supplies Concentric Reducers (centreline of pipe maintained, used in vertical runs) and Eccentric Reducers (flat bottom or flat top, used in horizontal runs to avoid air pockets or maintain flow-line elevation). Both types are available in UNS N10276 (Werkstoff 2.4819) from 3/4″ NB reducing down to 1/2″ NB, up to 24″ NB x 20″ NB, across schedule classes Sch 5S to XXS. Material test reports (MTR) in accordance with EN 10204 3.1 are supplied as standard.

Hastelloy C276 Stub End (Type A and Type B) ASTM B366

Hastelloy C276 Stub Ends are used with loose backing flanges to allow rotation and minimise alloy usage in flanged piping systems. Kalpataru Piping supplies both Type A (long pattern) and Type B (short pattern) stub ends conforming to ASTM B366 UNS N10276 and dimensioned to MSS-SP-43 / ASME B16.9. Sizes available from 1/2″ NB to 24″ NB. Stub ends are commonly paired with carbon steel or stainless steel lap joint flanges, reducing overall project cost while maintaining full Hastelloy C276 wetted surfaces.

Hastelloy C276 Pipe Cap ASTM B366 ASME B16.9

Hastelloy C276 Pipe Caps terminate open pipe ends in corrosive service systems. Caps manufactured by Kalpataru Piping conform to ASTM B366 UNS N10276 and are dimensioned to ASME B16.9. Available in sizes 1/2″ NB through 24″ NB, schedules Sch 5S to XXS, in both seamless and welded construction. The dished geometry distributes pressure uniformly at line termination points in chemical processing, offshore, and pharmaceutical piping system

Hastelloy C276 Cross (Equal and Reducing) ASTM B366

Equal and Reducing Crosses in Hastelloy C276 provide four-way branch connections in complex piping networks. Manufactured per ASTM B366 UNS N10276 and dimensioned to ASME B16.9, Kalpataru Piping supplies equal crosses from 1/2″ NB to 12″ NB and reducing crosses from 1″ NB to 12″ NB in schedule classes Sch 5S to XXS. Applications include distribution manifolds in chemical plants, FGD scrubber systems, and offshore topside piping where Hastelloy C276 corrosion resistance is essential.

Hastelloy C276 Pipe Bends (Long Radius Bends 3D / 5D) ASTM B366

Long Radius Bends in Hastelloy C276 are fabricated to ASTM B366 UNS N10276 with 3D and 5D centre-line radius options, and to ASME B16.9 dimensional tolerances. Kalpataru Piping supplies piggable bends and custom-radius bends sized from 1/2″ NB to 24″ NB, in schedule classes Sch 5S through XXS. The 3D and 5D bend radius variants are preferred in pipeline systems where flow efficiency and pigging requirements must both be met. For complete fabricated piping assemblies incorporating these bends, refer to Hastelloy C276 Pipe Spools. For welding consumables, refer to Hastelloy C276 Filler Wire.

Standards and Grade Reference for Hastelloy C276 Buttweld Fittings

Standard / Designation	Scope and Applicability
ASTM B366	Material standard for wrought nickel and nickel alloy buttweld fittings. Governs chemical composition, mechanical properties, heat treatment, and marking for UNS N10276 fittings.
ASME SB366	ASME adoption of ASTM B366 for pressure vessel and piping code compliance (ASME Section II, Part B).
ASME B16.9	Factory-made wrought buttwelding fittings: dimensional standards for 90 deg LR elbow, 45 deg LR elbow, 180 deg return bend, equal tee, reducing tee, concentric reducer, eccentric reducer, stub end (long pattern), and cap.
ASME B16.28	Wrought buttwelding Short Radius (SR) elbows and returns: 90 deg SR and 180 deg SR configurations. Governs short pattern elbows where space constraints prevent use of 1.5D radius.
MSS-SP-43	Wrought and fabricated buttwelding fittings for low-pressure, corrosion-resistant applications. Applies to Stub End Type A and Type B and to light-wall schedule fittings including Sch 5S and 10S.
UNS N10276	Unified Numbering System designation for Hastelloy C276 alloy (Ni-Mo16-Cr15-W). Equivalent to Werkstoff 2.4819 (EN) and NiMo16Cr15W.
WP-HC276 / WPHC276	Grade designation appearing on ASTM B366 compliant fittings. WP = wrought piping; HC276 = Hastelloy C276 alloy. Confirms the fitting is manufactured from wrought (not cast) material and is suitable for high-pressure piping.
NACE MR0175 / ISO 15156	Sour service (H2S-containing) material qualification standard. Hastelloy C276 UNS N10276 is approved under NACE MR0175 for use in oil and gas sour service environments. All Kalpataru Piping C276 fittings are available with NACE compliance documentation.

NACE MR0175 and Sour Service Compliance for Hastelloy C276 Fittings

Hastelloy C276 (UNS N10276) is one of the most widely approved alloys under NACE MR0175 / ISO 15156 for use in sour hydrocarbon service where hydrogen sulfide (H2S) is present. The high molybdenum content (15 to 17%) and the presence of tungsten in the NiMo16Cr15W composition give Hastelloy C276 fittings exceptional resistance to sulfide stress cracking (SSC) and stress corrosion cracking (SCC) in both wet H2S and chloride-containing environments.

Kalpataru Piping supplies Hastelloy C276 Buttweld Fittings (ASTM B366 UNS N10276) with full NACE MR0175 compliance documentation on request. This includes material test reports (MTR) to EN 10204 3.1 or 3.2, positive material identification (PMI), hardness test reports, and third-party inspection certificates. These documents are routinely required by oil and gas project procurement teams for sour service piping specifications.

Typical applications requiring NACE MR0175 compliant Hastelloy C276 fittings include: offshore platform topside piping, subsea wellhead flowlines, sour gas processing columns, amine scrubber systems, and hydrogen sulfide removal units. For complete fabricated spur lines and spools in C276, refer to Hastelloy C276 Pipe Spools. For paired flanges, refer to Hastelloy C276 Flanges.

Marking & Packing of Hastelloy C276 Buttweld Fittings

Kalpataru Piping Solutions pack Hastelloy C276 Buttweld Fittings properly and carefully to ensure that there is no damage to the Hastelloy C276 Buttweld Fittings during the transit. We pack Hastelloy C276 Buttweld Fittings in wooden boxes and supply it all over the world.

High-Quality Hastelloy C276 Buttweld Fittings – Quality Assurance!

Kalpataru Piping Solutions Is One Of The Most Trusted Exporter, Supplier, Stockist & Manufacturer Of Hastelloy C276 Buttweld Fittings. Kalpataru Piping Solutions Offers High-Quality Hastelloy C276 Buttweld Fittings. We Inspect Our Hastelloy C276 Buttweld Fittings At Each Stage Of Production Process, To Make Sure That The Quality Of The Hastelloy C276 Buttweld Fittings Is Not Compromised. They Are Examined To Confirm Their Standards And We Also Offer Third Party Inspection Of Our Hastelloy C276 Buttweld Fittings On Demand Of Our Clients. Kalpataru Piping Solutions even Offer Test Certificates For Our Hastelloy C276 Buttweld Fittings.

We Pack Hastelloy C276 Buttweld Fittings Properly And Carefully To Ensure That There Is No Damage To Hastelloy C276 Buttweld Fittings During The Transit. We Pack Hastelloy C276 Buttweld Fittings In Wooden Boxes And Supply It All Over The World.

Why Choose Kalpataru Piping Solutions For Buying Hastelloy C276 Buttweld Fittings?

Huge Stock Of Hastelloy C276 Buttweld Fittings.
Large Production Capacity Of Hastelloy C276 Buttweld Fittings
Kalpataru Piping Solutions Offer Highest Quality Hastelloy C276 Buttweld Fittings At Lowest Price
We Offer Customised Sizes For Hastelloy C276 Buttweld Fittings Depending On Our Clients Requirement.

Kalpataru Piping Solutions Offer High-Quality Hastelloy C276 Buttweld Fittings With Test Certificates. We Even Allow Third Party Inspection.

Frequently Asked Questions ( FAQ)

What is the difference between ASTM B366 and ASTM B622 for Hastelloy C276?

ASTM B366 is the material standard for wrought nickel and nickel alloy buttweld pipe fittings (elbows, tees, reducers, caps, stub ends). It governs how the fittings themselves are manufactured, tested, and marked. ASTM B622 is an entirely different specification that covers Hastelloy C276 seamless pipe and tube. When procuring buttweld fittings in Hastelloy C276, buyers must specify ASTM B366 UNS N10276. Specifying B622 for fittings is a common procurement error because B622 is a pipe standard, not a fitting standard. The confusion arises because the pipe used as raw material to form the fittings may itself originate from B622 pipe, but the finished fitting is certified and marked to B366.

What does the WP-HC276 grade designation mean on a buttweld fitting?

WP stands for wrought piping and HC276 designates the Hastelloy C276 alloy (UNS N10276). The WP prefix in ASTM B366 confirms that the fitting was manufactured from wrought (worked) material rather than cast material. This is important for high-pressure piping applications where wrought microstructure provides superior toughness, uniformity, and corrosion resistance compared to castings. A fitting marked WPHC276 or WP-HC276 meets the full requirements of ASTM B366 for chemical composition, mechanical properties, heat treatment, and non-destructive examination.

What is the difference between a Long Radius (LR) and Short Radius (SR) Hastelloy C276 elbow?

A Long Radius (LR) elbow has a centre-to-face dimension equal to 1.5 times the nominal pipe diameter (1.5D). It conforms to ASME B16.9 and provides a gentler flow path, resulting in lower pressure drop and reduced erosion. An LR elbow is the default choice for most process piping applications. A Short Radius (SR) elbow has a centre-to-face dimension equal to the nominal pipe diameter (1D). It conforms to ASME B16.28 and is used in confined spaces where an LR elbow does not fit. SR elbows produce higher pressure drop and greater turbulence, so they are chosen only when space constraints make an LR elbow impractical. Hastelloy C276 elbows in both LR and SR configurations are available from Kalpataru Piping in sizes 1/2″ NB to 24″ NB.

What is the difference between seamless and welded Hastelloy C276 buttweld fittings?

Seamless Hastelloy C276 buttweld fittings are manufactured by hot forming or extrusion from a solid billet without any longitudinal seam weld. They offer uniform wall thickness and the highest mechanical integrity, making them the preferred choice for high-pressure, high-temperature, and sour service applications. Seamless fittings to ASTM B366 are available in smaller sizes typically up to 10″ NB. Welded or fabricated fittings are manufactured by forming plate or pipe and joining with a seam weld, allowing larger diameters up to 48″ NB. Both types carry the ASTM B366 certification and the WP-HC276 grade marking. For sizes above 10″ NB, welded and fabricated construction is the industry standard. Kalpataru Piping supplies both seamless and welded Hastelloy C276 fittings with full material traceability.

Are Hastelloy C276 buttweld fittings suitable for sour (H2S) service?

Yes. Hastelloy C276 (UNS N10276) is approved under NACE MR0175 / ISO 15156 for use in sour hydrocarbon service containing hydrogen sulfide (H2S). The alloy is highly resistant to both sulfide stress cracking (SSC) and stress corrosion cracking (SCC) due to its high nickel, high molybdenum, and tungsten-containing composition. Kalpataru Piping can supply Hastelloy C276 ASTM B366 buttweld fittings with NACE MR0175 compliance documentation, including material test reports (MTR), PMI, and hardness test certificates as required by oil and gas project specifications.

Which internal links help engineers sourcing a complete Hastelloy C276 piping spool?

Engineers procuring a complete C276 piping system will find the following Kalpataru Piping product pages useful: Hastelloy C276 Buttweld Fittings (this page), Hastelloy C276 Seamless Pipes and Tubes, Hastelloy C276 Flanges, Hastelloy C276 Forged Fittings (B16.11), Hastelloy C276 Pipe Spools, and Hastelloy C276 Filler Wire.