Inconel 625 Flanges
Teshi Group manufactures Inconel 625 flanges (ASTM B564 UNS N06625, 2.4856, Alloy 625) 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.
Nickel–chromium alloys hold their strength and resist oxidation, carburisation and chloride stress corrosion cracking from cryogenic temperatures to well above 900 °C.
Inconel 625 flanges at a glance
| Material | Inconel 625 |
|---|---|
| Specification | ASTM B564 N06625 |
| UNS / W.Nr. | N06625 / 2.4856 |
| 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 |
Inconel 625 chemistry and mechanical properties
Chemical composition of Inconel 625 (weight %, maximum unless a range)
| Grade | C | Cr | Ni | Mo | Nb | Fe |
|---|---|---|---|---|---|---|
| Alloy 625 | 0.10 | 20.0–23.0 | 58.0 min | 8.0–10.0 | 3.15–4.15 (Nb+Ta) | 5.0 |
Mechanical properties of Inconel 625 (minimum, room temperature)
| Grade | Tensile strength | Yield strength (0.2 %) | Elongation | Note |
|---|---|---|---|---|
| Alloy 625 | 827 MPa (120 ksi) | 414 MPa (60 ksi) | 30 % | Annealed |
Matching specifications by product form
| Grade | Forged flanges & fittings | Butt weld fittings | Plate | Pipe |
|---|---|---|---|---|
| Alloy 625UNS N06625 · W.Nr. 2.4856 | ASTM B564 N06625 | ASTM B366 WPNCMC | ASTM B443 | ASTM B444 |
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 Inconel 625 is used
- Furnace, heater and high-temperature process piping
- Sour gas and oil well equipment (825, 625)
- Sulphuric and phosphoric acid service (825)
- Seawater and chloride service (625)
- Chemical and petrochemical reactors
Testing & certification
- PMI on every piece
- Intergranular corrosion testing to ASTM G28 when specified
- Ultrasonic testing of forgings when specified
- EN 10204 3.1 certificate; 3.2 on request
FAQ
Inconel 625 flanges: common questions
What specification covers Inconel 625 flanges?
Inconel 625 flanges are forged to ASTM B564 N06625 and dimensioned to ASME B16.5, ASME B16.47 or EN 1092-1.
What is the chemical composition of Alloy 625?
Alloy 625 (UNS N06625): C 0.10, Cr 20.0–23.0, Ni 58.0 min, Mo 8.0–10.0, Nb 3.15–4.15 (Nb+Ta), Fe 5.0 (weight %; single values are maximums).
What are the minimum mechanical properties of Alloy 625?
Tensile strength 827 MPa (120 ksi), yield strength 414 MPa (60 ksi), elongation 30 %.
Is Teshi Group a manufacturer of Inconel 625 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 Inconel 625 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.
Which specification covers Inconel flanges?
Nickel alloy forgings including Inconel 600, 625 and 825 flanges are made to ASTM B564 / ASME SB564; butt weld fittings to ASTM B366 / ASME SB366.
What is the strength of Inconel 625?
Annealed alloy 625 (UNS N06625) forgings to ASTM B564 have a minimum tensile strength of 827 MPa and yield strength of 414 MPa.
Ready to build to spec?
Share your drawing, bill of materials or technical requirements with the Teshi team.