Hastelloy C-276 Pipe Fittings
Teshi Group manufactures Hastelloy C-276 pipe fittings (ASTM B366 WPHC276, B564 N10276) as an OEM in India — butt weld fittings to ASME B16.9 and forged socket weld and threaded fittings to ASME B16.11, with heat-number traceability on every piece.
When stainless and duplex steels are not enough, nickel–molybdenum and nickel–copper alloys handle wet chlorine, hydrochloric and hydrofluoric acids, ferric chlorides and hot sulphuric acid.
Hastelloy C-276 pipe fittings at a glance
| Material | Hastelloy C-276 |
|---|---|
| Specification | Butt weld: ASTM B366 WPHC276 · Forged: ASTM B564 N10276 |
| UNS / W.Nr. | N10276 / 2.4819 |
| Sizes | Butt weld NPS ½"–48", Sch 5S–XXS · Forged NPS ⅛"–4" |
| Pressure class | Wall to pipe schedule (B16.9) · Class 2000, 3000, 6000, 9000 (B16.11) |
| Facing / ends | Bevelled ends to ASME B16.25; socket weld and NPT threaded ends |
| Certification | EN 10204 3.1 standard · 3.2 with third-party inspection · IBR on request |
| Testing | PMI, hardness, dimensional; UT, IGC, impact and ferrite as specified |
Hastelloy C-276 chemistry and mechanical properties
Chemical composition of Hastelloy C-276 (weight %, maximum unless a range)
| Grade | C | Cr | Ni | Mo | W | Co | Fe |
|---|---|---|---|---|---|---|---|
| Hastelloy C-276 | 0.010 | 14.5–16.5 | Balance | 15.0–17.0 | 3.0–4.5 | 2.5 | 4.0–7.0 |
Mechanical properties of Hastelloy C-276 (minimum, room temperature)
| Grade | Tensile strength | Yield strength (0.2 %) | Elongation | Note |
|---|---|---|---|---|
| Hastelloy C-276 | 690 MPa (100 ksi) | 283 MPa (41 ksi) | 40 % | Universal corrosion |
Matching specifications by product form
| Grade | Forged flanges & fittings | Butt weld fittings | Plate | Pipe |
|---|---|---|---|---|
| Hastelloy C-276UNS N10276 · W.Nr. 2.4819 | ASTM B564 N10276 | ASTM B366 WPHC276 | ASTM B575 | ASTM B622 |
Limits and minimums from the governing ASTM / ASME specifications, summarised for convenience; the current edition takes precedence.
Pressure rating
Butt weld fittings carry the same pressure rating as straight seamless pipe of the same material and wall thickness, so the fitting schedule is matched to the line pipe (ASME B16.9). Forged socket weld and threaded fittings are rated by class — 3000 and 6000 for socket weld, 2000, 3000 and 6000 for threaded — per ASME B16.11.
Types we manufacture
Dimension charts
Where Hastelloy C-276 is used
- Wet chlorine and chlorine dioxide service (C-276, C-22)
- Flue-gas desulphurisation and pollution control
- Hydrofluoric acid alkylation and seawater (Monel 400)
- Hot sulphuric acid piping (Alloy 20)
- Pharmaceutical and fine-chemical reactors
Testing & certification
- PMI on every piece
- ASTM G28 intergranular corrosion testing when specified
- Solution annealing per specification
- EN 10204 3.1 certificate; 3.2 on request
Related materials
FAQ
Hastelloy C-276 pipe fittings: common questions
What specification covers Hastelloy C-276 pipe fittings?
Hastelloy C-276 butt weld fittings are made to ASTM B366 WPHC276 with dimensions to ASME B16.9; forged socket weld and threaded fittings are made to ASTM B564 N10276 with dimensions to ASME B16.11.
What is the chemical composition of Hastelloy C-276?
Hastelloy C-276 (UNS N10276): C 0.010, Cr 14.5–16.5, Ni Balance, Mo 15.0–17.0, W 3.0–4.5, Co 2.5, Fe 4.0–7.0 (weight %; single values are maximums).
What are the minimum mechanical properties of Hastelloy C-276?
Tensile strength 690 MPa (100 ksi), yield strength 283 MPa (41 ksi), elongation 40 %.
Is Teshi Group a manufacturer of Hastelloy C-276 pipe fittings in India?
Yes. Teshi Group has manufactured flanges and fittings in India since 1971 and is ISO 9001:2015 certified and IBR approved. Every Hastelloy C-276 piece is hard-stamped with its heat number and supplied with an EN 10204 3.1 certificate; 3.2 with third-party inspection on request.
What is Hastelloy C-276 used for?
C-276 (UNS N10276) resists a very wide range of media including wet chlorine, ferric and cupric chlorides, and oxidising and reducing acids, so it is used in chemical reactors, FGD scrubbers and pollution-control systems.
Which specification covers Monel 400 flanges?
Monel 400 (UNS N04400) forged flanges are made to ASTM B564 and butt weld fittings to ASTM B366 WPNC.
Nickel alloys grade data sheets
Nickel alloys overview →Chemical composition, mechanical properties and PDF data sheet for each grade.
Ready to build to spec?
Share your drawing, bill of materials or technical requirements with the Teshi team.