Products Description
Product Specifications
| Standards | ASTM B444 |
| Steel Grades |
Inconel 625 / UNS N06625 |
| Equivalent Standards / Materials | W.Nr 2.4856 / DIN 2.4856;EN NiCr22Mo9Nb;ISO NiCr22Mo9Nb;JIS SUS6625;GOST 06HNK35МДТ |
| Outer Diameter (OD) | 6 mm – 630 mm |
| Wall Thickness (WT) | 0.5 mm – 55 mm |
| Length | 6 / 12 m |
| Surface Treatment | Cold-worked, pickled, bright annealed or polished |
| Production Process | Cold Drawn / Cold Rolled |
| Condition | Annealed or solution annealed |
Inconel 625 boasts a PREN value exceeding 50-significantly higher than that of super duplex stainless steel (PREN ~42) and austenitic stainless steel (PREN ~26)-delivering exceptional corrosion resistance. TORICH Inconel 625 seamless pipe undergoes rigorous chemical composition testing to ensure compliance with ASTM B444.
With a continuous operating temperature range of -196°C to 980°C, Inconel 625 maintains excellent oxidation resistance even at high temperatures. Furthermore, it can be used in the as-welded condition without post-weld heat treatment, improving the efficiency of on-site installation and maintenance for downhole equipment.
Customized Services
- TORICH offers customizable dimensions tailored to well depth, structural specifications, and equipment design requirements; the product range spans from a minimum outer diameter of 6 mm to a maximum of 630 mm, covering everything from capillary tubing to main pipelines.
- Various end-finishing options are available-including plain end (PE), beveled end (BE), threaded end (API or custom threads), and grooved end-to meet the connection requirements of downhole tubing strings.
- A range of surface treatment options is offered, including bright annealing (BA), pickling and passivation, polishing, and mirror finishing.
- Products can be supplied in continuous coiled form with lengths reaching hundreds of meters, thereby reducing the number of downhole connections and minimizing the risk of leakage.
Chemical Composition
| Element | Ni | Cr | Mo | Nb + Ta | Fe | C | Mn | Si | P | S | Al + Ti |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Inconel 625 | ≥58 | 20–23 | 8–10 | 3.15–4.15 | ≤5 | ≤0.10 | ≤0.50 | ≤0.50 | ≤0.015 | ≤0.015 | ≤0.50 |
Mechanical Properties
| Property | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness (HB) |
| Inconel 625 Gr.1 (Annealed) | ≥760 | ≥345 | ≥30 | ≤220 |
| Inconel 625 Gr.2 (Solution Annealed) | ≥930 | ≥515 | ≥30 | ≤260 |
Possible Alternative Grades
- For ultra-high-temperature pipelines used in downhole thermal recovery equipment, Inconel 617 is a suitable choice; compared to Inconel 625, it offers superior high-temperature structural stability and a maximum service temperature of 1050°C.
- For mildly corrosive conditions-such as shallow oil and gas wells with low sulfur and salt content-254SMO super stainless steel can be used, as it offers excellent resistance to chloride pitting at a lower cost.
- Inconel 825 belongs to the same nickel-chromium-molybdenum alloy family as Inconel 617 but is more cost-effective; it exhibits excellent resistance to moderate-temperature sulfidation and chloride corrosion, making it suitable for downhole pipelines in conventional deep wells operating at temperatures below 600°C with moderate corrosivity.
application areas
Leveraging its exceptional corrosion resistance and stability under high-temperature and high-pressure conditions, ASTM B444 Inconel 625 seamless pipe is widely used in critical downhole equipment for onshore and offshore oil and gas extraction. Specific applications include:
- Tubing and casing systems for deep and ultra-deep oil and gas wells
- Fluid transport pipelines for sour oil and gas wells (high H₂S, CO₂, and chloride content)
- Downhole control lines, hydraulic power lines, and instrumentation/sensing lines for offshore oil platforms
- Corrosion-resistant pipelines for downhole acid injection, water injection, and chemical agent delivery
- High-pressure manifold connecting lines at the wellhead and auxiliary lines for downhole safety valves
Products Show
Testing Equipment
Factory Equipment
Pickling equipment
Products Package
FAQ
Q: What is the equivalent grade of Inconel 625?
A: The primary designations are UNS N06625, Alloy 625 and W.Nr. 2.4856. The EN material designation is commonly given as NiCr22Mo9Nb.
Q: What is the difference between ASTM B444 Grade 1 and Grade 2?
A: Grade 1 is annealed, while Grade 2 is solution annealed. Grade 2 is intended for higher-temperature applications where creep and rupture resistance are required.
Q: Can Inconel 625 be used in sour-service applications?
A: It can be considered for sour-service applications, but the actual material condition and operating environment must satisfy the applicable NACE MR0175/ISO 15156 requirements. ASTM B444 alone should not be treated as a sour-service qualification.
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