Monel 400 Flanges
Teshi Group manufactures Monel 400 flanges (ASTM B564 UNS N04400, 2.4360, nickel-copper) 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.
Monel 400 flanges at a glance
| Material | Monel 400 |
|---|---|
| Specification | ASTM B564 N04400 |
| UNS / W.Nr. | N04400 / 2.4360 |
| 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 |
Monel 400 chemistry and mechanical properties
Chemical composition of Monel 400 (weight %, maximum unless a range)
| Grade | C | Mn | Si | Ni | Cu | Fe |
|---|---|---|---|---|---|---|
| Monel 400 | 0.3 | 2.0 | 0.5 | 63.0 min | 28.0–34.0 | 2.5 |
Mechanical properties of Monel 400 (minimum, room temperature)
| Grade | Tensile strength | Yield strength (0.2 %) | Elongation | Note |
|---|---|---|---|---|
| Monel 400 | 483 MPa (70 ksi) | 172 MPa (25 ksi) | 35 % | HF, seawater |
Matching specifications by product form
| Grade | Forged flanges & fittings | Butt weld fittings | Plate | Pipe |
|---|---|---|---|---|
| Monel 400UNS N04400 · W.Nr. 2.4360 | ASTM B564 N04400 | ASTM B366 WPNC | ASTM B127 | ASTM B165 |
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 Monel 400 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
Monel 400 flanges: common questions
What specification covers Monel 400 flanges?
Monel 400 flanges are forged to ASTM B564 N04400 and dimensioned to ASME B16.5, ASME B16.47 or EN 1092-1.
What is the chemical composition of Monel 400?
Monel 400 (UNS N04400): C 0.3, Mn 2.0, Si 0.5, Ni 63.0 min, Cu 28.0–34.0, Fe 2.5 (weight %; single values are maximums).
What are the minimum mechanical properties of Monel 400?
Tensile strength 483 MPa (70 ksi), yield strength 172 MPa (25 ksi), elongation 35 %.
Is Teshi Group a manufacturer of Monel 400 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 Monel 400 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.
Ready to build to spec?
Share your drawing, bill of materials or technical requirements with the Teshi team.