Incoloy 825 Pipes
Incoloy 825 pipes, also referred to as 'alloy 825 pipe' or 'UNS N08825' pipe, are a nickel-iron-chromium alloy with additions of molybdenum, copper, and titanium. The grade is stabilised against sensitisation, which prevents intergranular corrosion after welding or heat exposure. It delivers proven resistance to both oxidising and reducing acids, chloride stress corrosion cracking, and pitting. These properties make it a first choice in chemical processing, oil and gas, marine, and nuclear fuel reprocessing environments where corrosion is the primary design challenge.
Incoloy 825 Pipe Price
The price of Incoloy 825 pipe depends on the pipe type, wall thickness, outer diameter, surface finish, and order quantity. Consider the key cost factors mentioned below before placing an order.
Approximate Price Range
Seamless Incoloy 825 pipes typically range from INR 600 to INR 1,200 per kg in India. Welded and ERW variants are more economical, starting from INR 400 per kg. The OD and schedule directly shift the final per-kg figure.
Cost per foot (approx.)
A standard 1-inch seamless pipe in Schedule 40 costs approximately INR 250-500 per foot. The final pricing varies by supplier, surface treatment, and any required third-party testing or certifications.
Factors Affecting Price
- Raw material cost: Nickel, chromium, molybdenum, and copper are the key alloying elements. Global price swings in these metals directly affect the finished pipe cost.
- Pipe type and finish: Seamless pipes cost more than welded or ERW pipes. Polished or pickled finishes are also more expensive than the standard mill finish.
- Order volume and dimensions: Ordering in bulk reduces the price per kg. Custom sizes, strict dimensions, and special approvals like NACE or PED increase the price.
Available Types Of Incoloy 825 Pipes
Alloy 825 pipe types are available in 5 types to suit varying pressure requirements, fabrication methods, and project specifications.
- Incoloy 825 Seamless Pipe
- Incoloy 825 Welded Pipe
- Incoloy 825 EFW Pipe
- Incoloy 825 ERW Pipe
- Incoloy 825 Custom Pipe
Incoloy 825 Pipe Specifications
The table below covers standard manufacturing parameters for Incoloy 825 pipes as per ASTM and ASME specifications.
|
Parameter |
Standard / Range |
|
Standard |
ASTM B423 / ASME SB423 |
|
Grade |
UNS N08825 / Alloy 825 / DIN 2.4858 |
|
Outer Diameter (OD) |
6.35 mm to 273 mm |
|
Pipe schedules |
Sch 5S to Sch 160 |
|
Forms available |
Seamless, Welded, EFW, ERW |
|
Wall thickness |
1.0 mm to 25 mm |
|
Finish |
Plain, Pickled, Polished (2B, No. 4, BA) |
Chemical Composition Of Alloy 825 Pipe
The composition below defines the corrosion resistance and phase stability of alloy 825 pipe. Titanium stabilises the alloy against sensitisation, while molybdenum and copper provide resistance to reducing acid environments.
|
Ni |
Fe |
C |
Mn |
Si |
Mo |
Cu |
Cr |
Al |
Ti |
S |
|
38.0–46.0 |
22.0 min |
0.05 max |
1.0 max |
0.5 max |
2.5–3.5 |
1.5–3.0 |
19.5–23.5 |
0.2 max |
0.6–1.2 |
0.015 max |
Mechanical Properties of Alloy 825 Pipe
These 3 mechanical property values define the load-bearing capability of Incoloy 825 pipes under standard test conditions
|
Property |
Value |
|
Tensile Strength |
586 MPa (85,000 psi) |
|
Yield Strength (0.2%) |
241 MPa (35,000 psi) |
|
Elongation |
30% |
Physical Properties of Incoloy 825 Pipe
The 2 physical property values below are required for engineering calculations involving thermal expansion, pressure ratings, and design temperature limits.
|
Property |
Value |
|
Density |
8.14 g/cm³ (0.294 lb/in³) |
|
Melting Range |
1370–1400°C (2500–2550°F) |
Size Chart of Alloy 825 Pipes
The size chart below covers standard OD, wall thickness, and weight values for Incoloy 825 pipes from 1/8" NPS to 10" NPS. Confirm exact dimensions with the supplier before ordering.
|
Size (inch) |
OD (mm) |
OD (inch) |
WT (mm) |
WT (inch) |
Weight (kg/m) |
Weight (lb/ft) |
|
1/8" NPS 6 |
10.3 |
0.41 |
1.73 |
0.068 |
0.37 |
0.24 |
|
1/4" NPS 8 |
13.7 |
0.54 |
2.24 |
0.088 |
0.63 |
0.42 |
|
3/8" NPS 10 |
17.1 |
0.68 |
2.31 |
0.091 |
0.84 |
0.57 |
|
1/2" NPS 15 |
21.3 |
0.84 |
2.77 |
0.109 |
1.27 |
0.85 |
|
3/4" NPS 20 |
26.7 |
1.05 |
2.87 |
0.113 |
1.69 |
1.13 |
|
1" NPS 25 |
33.4 |
1.32 |
3.38 |
0.133 |
2.5 |
1.68 |
|
1 1/4" NPS 32 |
42.2 |
1.66 |
3.56 |
0.140 |
3.39 |
2.27 |
|
1 1/2" NPS 40 |
48.3 |
1.9 |
3.68 |
0.145 |
4.05 |
2.72 |
|
2" NPS 50 |
60.3 |
2.375 |
3.91 |
0.154 |
5.44 |
3.65 |
|
2 1/2" NPS 65 |
73.0 |
2.875 |
5.16 |
0.203 |
8.63 |
5.79 |
|
3" NPS 80 |
88.9 |
3.5 |
5.49 |
0.216 |
11.29 |
7.58 |
|
3 1/2" NPS 90 |
101.6 |
4.0 |
5.74 |
0.226 |
13.57 |
9.11 |
|
4" NPS 100 |
114.3 |
4.5 |
6.02 |
0.237 |
16.07 |
10.79 |
|
5" NPS 125 |
141.3 |
5.563 |
6.55 |
0.258 |
21.77 |
14.62 |
|
6" NPS 150 |
168.3 |
6.625 |
7.11 |
0.280 |
28.26 |
18.97 |
|
8" NPS 200 |
219.1 |
8.625 |
8.18 |
0.322 |
42.55 |
28.55 |
|
10" NPS 250 |
273.0 |
10.75 |
9.27 |
0.365 |
60.31 |
40.48 |
Incoloy 825 DIN 2.4858 Pipe Schedule And Wall Thickness
The schedule chart below lists standard wall thicknesses in inches for DIN 2.4858 pipes across common nominal pipe sizes and schedules. Use this to match the pipe schedule to pressure class requirements.
|
Nominal |
O.D. Inches |
10s |
10 |
40s/Std |
40 |
80s/E.H. |
80 |
160 |
|
1/8 |
.405 |
.049 |
.049 |
.068 |
.068 |
.095 |
.095 |
— |
|
1/4 |
.540 |
.065 |
.065 |
.088 |
.088 |
.119 |
.119 |
— |
|
3/8 |
.675 |
.065 |
.065 |
.091 |
.091 |
.126 |
.126 |
— |
|
1/2 |
.840 |
.083 |
.083 |
.109 |
.109 |
.147 |
.147 |
.187 |
|
3/4 |
1.050 |
.083 |
.083 |
.113 |
.113 |
.154 |
.154 |
.218 |
|
1 |
1.315 |
.109 |
.109 |
.133 |
.133 |
.179 |
.179 |
.250 |
|
1 1/4 |
1.660 |
.109 |
.109 |
.140 |
.140 |
.191 |
.191 |
.250 |
|
1 1/2 |
1.900 |
.109 |
.109 |
.145 |
.145 |
.200 |
.200 |
.281 |
|
2 |
2.375 |
.109 |
.109 |
.154 |
.154 |
.218 |
.218 |
.343 |
|
2 1/2 |
2.875 |
.120 |
.120 |
.203 |
.203 |
.276 |
.276 |
.375 |
|
3 |
3.500 |
.120 |
.120 |
.216 |
.216 |
.300 |
.300 |
.437 |
|
3 1/2 |
4.000 |
.120 |
.120 |
.226 |
.226 |
.318 |
.318 |
— |
|
4 |
4.500 |
.120 |
.120 |
.237 |
.237 |
.337 |
.337 |
.531 |
|
5 |
5.563 |
.134 |
.134 |
.258 |
.258 |
.375 |
.375 |
.625 |
|
6 |
6.625 |
.134 |
.134 |
.280 |
.280 |
.432 |
.432 |
.718 |
|
8 |
8.625 |
.148 |
.148 |
.322 |
.322 |
.500 |
.500 |
.906 |
|
10 |
10.750 |
.165 |
.165 |
.365 |
.365 |
.500 |
.593 |
1.125 |
|
12 |
12.750 |
.180 |
.180 |
.375 |
.406 |
.500 |
.687 |
1.312 |
|
14 |
14.000 |
.188 |
.250 |
.375 |
.437 |
.500 |
.750 |
1.406 |
|
16 |
16.000 |
.188 |
.250 |
.375 |
.500 |
.500 |
.843 |
1.593 |
|
18 |
18.000 |
.188 |
.250 |
.375 |
.562 |
.500 |
.937 |
1.781 |
Key Features Of Incoloy 825 Pipes
Incoloy 825 pipes offer 5 performance advantages that set them apart in corrosion-critical and high-temperature applications.
- Superior Corrosion Resistance
- Chloride Resistance
- Stabilized Composition
- Machinability
- Heat Treatment
Applications Of Alloy 825 Pipe
Alloy 825 pipe serves 5 industries where resistance to aggressive chemicals, seawater, or radiation-associated environments is a design requirement.
- Chemical Processing
- Oil and Gas
- Nuclear Fuel Reprocessing
- Pollution Control
- Marine & Offshore
How To Choose The Right Incoloy 825 Pipe Supplier?
Choosing the right Incoloy 825 pipe supplier determines product consistency, certification reliability, and delivery performance. Evaluate suppliers on these 6 criteria before committing to an order.
Evaluate the manufacturer’s technical expertise: A reliable supplier should have in-house metallurgical knowledge of nickel alloy grades. Request mill test reports, technical data sheets, and project references for the UNS N08825 supply.
Check grade availability and product range: Confirm that the supplier stocks Incoloy 825 in the pipe types, OD ranges, and schedules required. A wide product range eliminates the need to source from multiple vendors.
Verify quality certifications and testing capabilities: ISO 9001 certification is the baseline. For critical service, look for suppliers with NACE MR0175, PED, or third-party inspection approvals.
Examine the strength of raw material sourcing: The performance of the finished pipe is directly related to the quality of the input materials. Request material traceability records and heat certificates from the main mills.
Assess customisation capabilities: Some applications need non-standard lengths, bevelled ends, or specific surface conditions. A supplier with in-house processing avoids outsourcing delays.
Review delivery timelines and supply capacity: For project-critical schedules, confirm warehouse stock levels and dispatch lead times before ordering.
Incoloy 825 Pipes Suppliers
Incoloy 825 Pipes FAQ's
The price of Incoloy 825 seamless pipe in India ranges between INR 600 and INR 1,200 per kg. Welded pipes cost around INR 400 per kilogram. The final cost is determined by outer diameter, wall thickness, surface finish, order number, and any special certifications required.
Alloy 825 pipes can be purchased from specialised nickel alloy pipe suppliers and distributors in India and from global markets. Confirm that the supplier can provide ASTM B423 or ASME SB423 material test reports before placing an order.
Incoloy 825 pipe is a nickel-iron-chromium alloy pipe containing 38–46% nickel, 19.5–23.5% chromium, 2.5–3.5% molybdenum, and 1.5–3.0% copper. It is titanium-stabilised and produced to ASTM B423 / ASME SB423 under UNS N08825. The alloy handles both oxidising and reducing acid environments, which makes it more versatile than standard austenitic stainless grades.
Incoloy 825 pipes are manufactured to ASTM B423 and ASME SB423 for seamless and welded pipe. The alloy designation is UNS N08825, and the DIN equivalent is 2.4858. Fittings are covered under ASTM B366, and flanges under ASTM B564.
Incoloy 825 contains higher nickel (38–46%) vs Incoloy 800 (30–35%) and adds molybdenum and copper for acid resistance. Incoloy 800 is better suited to high-temperature oxidising service above 600°C, while Incoloy 825 outperforms it in reducing acid, chloride, and sulfide environments at lower temperatures.
Incoloy 825 pipes are available from 1/8" NPS (10.3 mm OD) to 10" NPS (273 mm OD) in standard form. Wall thickness schedules range from Sch 10s to Sch 160. Standard lengths are 6 metres and 12 metres, with custom-cut lengths available from select stockists.
Incoloy 825 pipes are available in four types, i.e., seamless, welded, ERW (electric resistance welded), and EFW (electric fusion welded). Seamless pipes are ideal for high-pressure and critical corrosion applications. Welded and ERW pipes are used where pressure requirements are low.