Hastelloy C-276 / C-22 Flanges
Teshi Group manufactures Hastelloy C-276 / C-22 flanges (ASTM B564 UNS N10276 / N06022, 2.4819 / 2.4602) as an OEM in India — forged, machined, marked and certified in-house to ASME B16.5, ASME B16.47, EN 1092-1 and customer drawings.
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 / C-22 flanges at a glance
| Material | Hastelloy C-276 / C-22 |
|---|---|
| Specification | ASTM B564 N10276 / ASTM B564 N06022 |
| UNS / W.Nr. | N10276 / 2.4819 · N06022 / 2.4602 |
| Sizes | NPS ½"–24" (ASME B16.5), 26"–60" (ASME B16.47 A / B), DN 10–600 (EN 1092-1) |
| Pressure class | Class 150, 300, 600, 900, 1500, 2500 · PN 6–40 |
| Facing / ends | RF, FF, RTJ, tongue & groove, male-female; serrated or smooth finish |
| 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 / C-22 chemistry and mechanical properties
Chemical composition of Hastelloy C-276 / C-22 (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 |
| Hastelloy C-22 | 0.015 | 20.0–22.5 | Balance | 12.5–14.5 | 2.5–3.5 | 2.5 | 2.0–6.0 |
Mechanical properties of Hastelloy C-276 / C-22 (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 |
| Hastelloy C-22 | 690 MPa (100 ksi) | 310 MPa (45 ksi) | 45 % | Oxidising media |
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 |
| Hastelloy C-22UNS N06022 · W.Nr. 2.4602 | ASTM B564 N06022 | ASTM B366 WPHC22 | ASTM B575 | ASTM B622 |
Limits and minimums from the governing ASTM / ASME specifications, summarised for convenience; the current edition takes precedence.
Pressure rating
Pressure–temperature ratings follow the ASME B16.5 / B16.47 material group for the grade. The applicable rating table is issued with every quotation, and flanges are marked with class, material and heat number.
Types we manufacture
Dimension charts
Where Hastelloy C-276 / C-22 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 / C-22 flanges: common questions
What specification covers Hastelloy C-276 / C-22 flanges?
Hastelloy C-276 / C-22 flanges are forged to ASTM B564 N10276 / ASTM B564 N06022 and dimensioned to ASME B16.5, ASME B16.47 or EN 1092-1.
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 / C-22 flanges 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 / C-22 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.
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