Incoloy 825 Seamless Pipes & Tubes – UNS N08825 Pipe Manufacturer & Supplier

Table of Content

Introduction to Incoloy 825 Alloy
Incoloy 825 vs Other Nickel Alloys
Alloy 825 Seamless Pipe vs Welded Pipe
ASTM B423 & ASME SB423 Specifications
Equivalent Grades
Chemical Composition
Mechanical Properties
Manufacturing Range & Dimensional Standards
Various Types of Incoloy 825 Pipes & Tubes
Pipe Weight Chart (Common Sizes)
Applications & Industries Served
Quality Assurance & Testing
Export Destinations & Supply Chain
Frequently Asked Questions

Introduction to Incoloy 825 Alloy

Kalpataru Piping is a leading manufacturer and supplier of high-performance nickel alloy piping products. We specialise in Incoloy 825 Pipes and Tubes, also referred to as UNS N08825 or DIN 2.4858. Incoloy 825 is a nickel-iron-chromium alloy supplemented with molybdenum, copper, and titanium. This unique chemical structure delivers superior resistance to reducing and oxidising acids, stress-corrosion cracking, and localised attack including pitting and crevice corrosion.

We manufacture standard and custom sizes in full compliance with ASTM B423 and ASME SB423 standards. Also referred to as Alloy 825 Pipe, this material is engineered to withstand extreme corrosion in sulfuric and phosphoric acid environments. Browse our complete Incoloy Products Range. We maintain ex-stock inventory of UNS N08825 Pipes for fast global delivery to the chemical process and oil and gas sectors.

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Incoloy 825 vs Other Nickel Alloys

Incoloy 825 offers far superior resistance to reducing acids compared with Incoloy 800, owing to the addition of Molybdenum (2.5–3.5%) and Copper (1.5–3.0%), which Grade 800 and standard stainless steel grades do not possess.

Alloy 825 also serves as a cost-effective alternative to Inconel 625 in most acid service applications where the very high-temperature strength of 625 is not required, yet superior corrosion resistance beyond 316L stainless steel is essential.

Incoloy 825 vs Incoloy 800 — Detailed Comparison

Property	Incoloy 825 (UNS N08825)	Incoloy 800 (UNS N08800)
Nickel Content	38–46%	30–35%
Molybdenum	2.5–3.5%	None
Copper	1.5–3.0%	None
Sulfuric Acid Resistance	Excellent	Limited
Phosphoric Acid Resistance	Excellent	Limited
Stress Corrosion Cracking	Excellent	Good
High-Temp Oxidation	Good (up to 540°C)	Excellent
Primary Use Case	Aqueous / acid corrosion	High-temp strength & oxidation

For a full grade-by-grade breakdown, see Incoloy 800 Pipes & Tubes.

Alloy 825 Seamless Pipe vs Welded Pipe

Alloy 825 Seamless Pipe is manufactured through cold drawing or extrusion, producing a homogenous structure free of weld seams. This makes it the preferred choice for high-pressure applications and severely corrosive services.

Incoloy 825 Welded Pipe (ERW / EFW) is produced from strip or plate. Post-weld heat treatment ensures the weld zone matches the corrosion resistance of the base metal. Welded pipes offer a cost advantage for large-diameter piping systems.

ASTM B423, ASME SB423 & Other Specifications

Specification	Details
Seamless Pipe & Tube	ASTM B423 / ASME SB423
Welded Pipe	ASTM B705 / ASME SB705
Heat Exchanger Tubes	ASTM B163 / ASME SB163
Welded Tube (Heat Exchanger)	ASTM B704 / ASME SB704
Welded Pipe (Large Diameter)	ASTM B515 / ASME SB515
Plate / Sheet	ASTM B424 / ASME SB424
Rod & Bar	ASTM B425 / ASME SB425
Size Range — Seamless	1/8″ NB to 24″ NB
Size Range — Welded / EFW	6″ NB to 48″ NB
OD Range	6.00 mm to 914.4 mm
Schedules	SCH 5, 10, 10S, 40, 40S, 80, 80S, 160, XXS
End Types	Plain End, Beveled End, Threaded One End, TBE
Delivery Condition	Annealed & Pickled, Polished, Bright Annealed
Standards Bodies	ASTM / ASME / DIN / JIS / BS / EN / GOST / GB / ISO

Equivalent Grades

UNS	Werkstoff Nr.	EN	JIS	BS	GOST
N08825	2.4858	NiCr21Mo	NCF 825	NA 16	ЭП703 (XH38BT)

Chemical Composition (% Weight)

Element	Content (%)
Nickel (Ni)	38.0 – 46.0
Chromium (Cr)	19.5 – 23.5
Iron (Fe)	22.0 min (Balance)
Molybdenum (Mo)	2.5 – 3.5
Copper (Cu)	1.5 – 3.0
Titanium (Ti)	0.6 – 1.2
Carbon (C)	0.05 max
Manganese (Mn)	1.0 max
Silicon (Si)	0.5 max
Sulfur (S)	0.03 max
Aluminum (Al)	0.2 max

Mechanical Properties (Room Temperature)

Property	Value
Density	8.14 g/cm³
Melting Point	1370 – 1400 °C
Tensile Strength (min)	85 ksi (586 MPa)
Yield Strength (0.2% Offset)	35 ksi (241 MPa)
Elongation (min)	30%

Types of Incoloy 825 Pipes & Tubes

We supply the full product form range for N08825 to serve diverse industrial applications:

Product Form	Typical Dimensions / Notes
Incoloy 825 Seamless Round Pipe/Tube	ANSI B36.19 / B36.10 standard sizes
Incoloy 825 Seamless Square Pipe	Custom sizes available
Incoloy 825 Rectangular Tube	Structural & corrosion-resistant applications
Incoloy 825 Welded Pipe (ERW / EFW)	Large diameter piping
Incoloy 825 Large Diameter Fabricated Pipe	24″ to 48″ OD — LSAW / fabricated
Incoloy 825 Capillary Tube	OD: 0.5 mm – 6 mm — high-pressure instrumentation
Incoloy 825 Instrumentation Tubing	Small bore: 3 mm – 25 mm OD
Incoloy 825 U-Bend Tube	Heat exchanger U-tubes to ASTM B163 / B704
Incoloy 825 Coiled Tube	Long-length coiled for offshore / downhole
Incoloy 825 Electropolished Tube	Pharma & sanitary applications
Incoloy 825 Heat Exchanger Tube	OD: 15.88 mm – 50.8 mm — ASTM B163
Incoloy 825 Ornamental Tube	Polished finish for aesthetics

Our Large Diameter Fabricated Incoloy 825 Pipe (24″ to 48″ OD) is manufactured using LSAW and EFW processes, serving FGD systems, refinery headers, and offshore structural applications. View all grades on our Incoloy Pipes & Tubes category page.

Incoloy 825 Pipe Weight Chart — Schedule 40 (Common Sizes)

The table below shows theoretical weights for Schedule 40 Incoloy 825 Pipe. Note: Alloy 825 density (8.14 g/cm³) is slightly higher than standard stainless steel. Use our Pipe Weight Calculator for exact values.

NPS (In.)	DN (mm)	OD (mm)	Schedule	Wall Thk (mm)	Weight (Kg/m)
1/2″	15	21.3	SCH 40	2.77	1.31
3/4″	20	26.7	SCH 40	2.87	1.75
1″	25	33.4	SCH 40	3.38	2.59
1 1/2″	40	48.3	SCH 40	3.68	4.20
2″	50	60.3	SCH 40	3.91	5.64
2 1/2″	65	73.0	SCH 40	5.16	8.95
3″	80	88.9	SCH 40	5.49	11.70
4″	100	114.3	SCH 40	6.02	16.66
6″	150	168.3	SCH 40	7.11	29.29
8″	200	219.1	SCH 40	8.18	44.11
10″	250	273.0	SCH 40	9.27	62.50
12″	300	323.8	SCH 40	9.53	76.54
14″	350	355.6	SCH 40	9.53	84.29
16″	400	406.4	SCH 40	9.53	96.66
18″	450	457.0	SCH 40	9.53	108.98
20″	500	508.0	SCH 40	9.53	121.75
24″	600	610.0	SCH 40	9.53	146.43

Custom Cut, Thread & Groove Services

To support EPC contractors and fabricators, Kalpataru Piping offers value-added processing on all Incoloy 825 Pipe orders:

Cut-to-Length — Precision sawing to project-specific dimensions
Threading — NPT / BSPT threading on both ends
Grooving — Roll or cut grooving for Victaulic-style couplings
Bevelling — Weld-prep bevels to ASME B16.25
Polishing / Electropolishing — For pharmaceutical and sanitary systems

Applications & Industries Served

Chemical Processing & Petrochemical

Incoloy 825 Pipes are widely used in sulfuric acid and phosphoric acid manufacturing, pickling operations, and radioactive waste processing. The copper addition enables survival in sulfuric acid tanks and piping systems. See also Incoloy 825 Plates & Sheets.

Oil & Gas Industry

Applied in hot sour gas wells with high concentrations of H₂S and chlorides. Alloy 825 Seamless Tubing is commonly used for downhole piping and separation units due to its resistance to sulfide stress cracking.

Heat Exchanger Applications

A standard material for air-cooled heat exchangers (fin-fan coolers) in refineries. Incoloy 825 U-Bend Tubes and Incoloy 825 Heat Exchanger Tubes conform to ASTM B163 and ASTM B704.

Pollution Control Equipment

Scrubbers, stack gas reheaters, and wet electrostatic precipitators use Incoloy 825 to resist acidic, sulfur-rich condensate produced during flue gas desulfurisation (FGD).

Quality Assurance & Testing

All Alloy 825 pipes are subject to rigorous quality control in compliance with ASTM B423 / ASME SB423:

PMI Testing — Verifies Ni (38–46%), Mo, Cu content
Mechanical Testing — Tensile and hardness testing
Intergranular Corrosion Test — Resistance to grain boundary attack
NDT — Hydrostatic and ultrasonic testing
Grain Size Analysis — Confirms proper annealing

We provide EN 10204 3.1 Mill Test Certificates (MTC) and can arrange Third Party Inspection (TPI) — TUV, DNV, or SGS — on request.

Incoloy 825 Pipe Price Per Kg in India — Request Current Price

Incoloy 825 pipe price varies with nickel and molybdenum market rates, pipe schedule, size, and order quantity. We offer competitive ex-works pricing from our Mumbai stocking location. Contact us for a current Incoloy 825 pipe price per kg in India and to discuss volume discounts.

Payment Modes Accepted

LC — Letter of Credit (irrevocable)
TT — Telegraphic Transfer
Cheque / DD — For domestic orders

Export Destinations & Global Supply Chain

We are a premier exporter of Incoloy 825 Seamless Pipes to over 40 countries. Our logistics network ensures safe and timely delivery worldwide:

Region	Countries
Middle East	Saudi Arabia, UAE, Qatar, Kuwait, Oman
Asia Pacific	Singapore, Malaysia, Indonesia, Thailand, Vietnam, Australia
Europe	Germany, Italy, UK, Netherlands, Spain
Americas	USA, Canada, Brazil, Mexico
Africa	South Africa, Nigeria, Egypt

Frequently Asked Questions

What is the difference between Incoloy 825 and 800?

Incoloy 825 contains significant additions of Molybdenum and Copper, which Incoloy 800 lacks. This gives Alloy 825 superior resistance to reducing acids (sulfuric, phosphoric) and localised corrosion. Incoloy 800 is primarily optimised for high-temperature oxidation resistance.

What is Incoloy 825 used for?

UNS N08825 Pipe is used in chemical processing (sulfuric and phosphoric acid plants), oil and gas (sour gas wells, downhole tubing), heat exchangers, pollution control scrubbers, and nuclear waste handling systems.

Is Incoloy 825 magnetic?

No. Incoloy 825 is a fully austenitic alloy and is essentially non-magnetic in the annealed condition.

What is the temperature rating for Incoloy 825?

Incoloy 825 Pipe performs well from cryogenic temperatures up to approximately 540 °C (1000 °F). Above this, microstructural changes can reduce ductility and impact strength. It is therefore not recommended for creep-rupture design applications.

What is the Incoloy 825 Pipe Price Per Kg in India?

The Incoloy 825 pipe price per kg in India depends on nickel market rates, pipe schedule, and quantity. Contact Kalpataru Piping for a current quotation. We accept LC, TT, and cheque payments.

Ready to Order? Contact Kalpataru Piping for Ex-Stock Delivery of Incoloy 825 Pipes & Tubes

Also see: Incoloy 825 Flanges | Fittings | Fasteners | Round Bars