Inconel 625 Pipe Specifications
The table below shows Alloy 625's full specifications and supply details. Inconel 625 pipe comes in two forms: seamless and welded. These variations adhere to ASTM B444 and ASTM B705 standards, respectively.
| Parameter | Details |
|---|---|
| Standard | ASTM B444 / ASME SB444 (Seamless), ASTM B705 / ASME SB705 (Welded) |
| Size Range | 1/8" NPS to 24" NPS (Seamless), up to 26" NPS (Welded) |
| Wall Thickness | 0.5 mm to 20 mm |
| Schedule | SCH 5, SCH 10, SCH 40, SCH 80, SCH 160, XXS |
| End Type | Plain End (PE), Bevelled End (BE), Threaded |
| Surface Finish | Annealed & Pickled, Bright Annealed, Mill Finish |
| Form | Seamless, Welded (ERW, EFW) |
Inconel 625 Pipe Sizes
Inconel 625 pipes are available in a wide range of sizes, wall thicknesses, and lengths to suit diverse high-performance industrial applications.
| Parameter | Specification |
|---|---|
| Seamless Size Range | 1/8" NPS (10.3 mm OD) to 24" NPS (610 mm OD) |
| Welded Size Range | Up to 26" NPS |
| Wall Thickness | 0.5 mm to 20 mm |
| Standard Length | 6 m and 12 m |
Inconel 625 Pipe Schedule Chart
The schedule chart below outlines the wall thicknesses across common pipe sizes, helping engineers select the right pressure rating for their specific application.
| NPS | OD (inches / mm) | SCH 10 (mm) | SCH 40 (mm) | SCH 80 (mm) | SCH 160 (mm) |
|---|---|---|---|---|---|
| 1/2" | 0.840 / 21.3 | 1.65 | 2.77 | 3.73 | 4.78 |
| 1" | 1.315 / 33.4 | 2.77 | 3.38 | 4.55 | 6.35 |
| 2" | 2.375 / 60.3 | 2.77 | 3.91 | 5.54 | 8.74 |
| 4" | 4.500 / 114.3 | 3.05 | 6.02 | 8.56 | 13.49 |
| 8" | 8.625 / 219.1 | 3.76 | 8.18 | 12.70 | 23.01 |
Inconel 625 Pipe Price
In India, Inconel 625 pipe typically costs ₹1,280 to ₹2,500 per kg because of its high nickel and molybdenum content. In international markets, prices are usually between USD $18 and $50 per kg on an FOB basis, depending on the pipe's form, outer diameter, and wall thickness. Seamless pipes cost more than welded forms. Final pricing is influenced by order quantity, surface finish, heat treatment condition and prevailing nickel and niobium market surcharges. Bulk orders generally attract more competitive rates.
Chemical Composition of Inconel 625 Pipe
The table below lists the chemical composition of Inconel 625 pipe per ASTM B444 / ASME SB-444.
Molybdenum and niobium strengthen the matrix without precipitation hardening.
Mechanical Properties of Inconel 625 Pipe
The table below shows mechanical properties for both ASTM B444 grades of Inconel 625 pipe.
| Property | Grade 1 (Annealed) | Grade 2 (Solution Annealed) |
|---|---|---|
| Tensile Strength (min) | 120 ksi (827 MPa) | 100 ksi (690 MPa) |
| Yield Strength, 0.2% Offset (min) | 60 ksi (414 MPa) | 40 ksi (276 MPa) |
| Elongation in 2" (min) | 30% | 30% |
Equivalent Designations for Inconel 625 Pipe
The table below lists globally accepted equivalent grades for Alloy 625 pipe across major regions. It is recognised under multiple international standards and trade designations.
| Standard / Region | Designation |
|---|---|
| USA (UNS) | N06625 |
| Germany (W.Nr) | 2.4856 |
| Europe (EN) | NiCr22Mo9Nb |
| Japan (JIS) | NCF 625 |
| China (GB/T) | NS336 |
Inconel 625 Grades
ASTM B444 classifies this pipe into two grades based on heat treatment. Each of these grades is available in both seamless and welded form.
Grade 1: Annealed
This type is usually used at lower temperatures (up to 1100°F or 593°C), often in marine or chemical processing.
Grade 2: Solution Annealed
This type is treated at higher temperatures (above 2000°F or 1093°C) to make it more resistant to creep and rupture, making it good for higher temperatures.
Inconel 625 Pipe Applications
Inconel 625 pipe serves industries that demand corrosion resistance and high-temperature strength.
Oil and Gas Industry
Alloy 625 pipe is widely used in subsea flowlines, wellhead components, and sour gas service pipelines where corrosion resistance is critical.
Chemical Processing
Inconel 625 pipe reliably handles sulphuric, phosphoric, and hydrochloric acid environments in heat exchangers, reactor vessels, and other aggressive chemical processing equipment.
Marine and Offshore Engineering
Seawater piping, exhaust ducting and riser assemblies use nickel alloy 625 pipe for chloride corrosion resistance in moist and chloride rich enviornment.
Power Generation and Nuclear
Steam generator tubing, reactor core components and flue gas desulphurisation systems rely on this alloy at sustained high temperatures.
Inconel 625 Pipe vs Inconel 625 Tube
Inconel 625 pipe is ordered by NPS with standardised schedules per ASTM B444; Inconel 625 tubes are ordered by exact OD and wall thickness.
| Parameter | Inconel 625 Pipe | Inconel 625 Tube |
|---|---|---|
| Sizing Method | NPS with a schedule | Exact OD and wall thickness |
| Primary Standard | ASTM B444 / ASME SB-444 | ASTM B983 / AMS 5581 |
| Typical Use | Pressure piping systems | Heat exchangers, instrumentation |
| Wall Tolerance | Schedule-based | Tighter tolerances |
Shipping & Packaging
Heavy-duty wooden boxes Packing
We strictly follow seaworthy export handling standards to protect Inconel 625 pipes from transit damage, moisture ingress, and surface contamination during long-distance dispatch.
- Heavy-duty wooden boxes with moisture barrier lining
- HDPE stretch film wrapping on all bundles
- Plastic end caps on threaded and plain-end pipes
- Silica gel desiccants to minimize moisture exposure
- ISPM-15 fumigated wooden packaging for export
Pipe Bundle Yard
Staging
Container End-Cap
Protection
Wrapped Export-Ready
Bundles
We Export Worldwide
Sachiya Steel International supplies Inconel 625 pipes to major industrial markets across North America, Europe, the Middle East, Asia and Africa with export-ready documentation and logistics support.
USA
Canada
Germany
UK
Italy
France
Australia
South Korea
Indonesia
Vietnam
Singapore
Malaysia
Taiwan
UAE
Saudi Arabia
Qatar
Oman
South Africa
Nigeria
Egypt