01
Incoloy 825 Round Bar
Solid rounds from 6 to 500 mm serve pump shafts, valve trim and machined acid-plant parts.
View Incoloy 825 Round Bar →Incoloy 825 Bar and Rod
Nickel-iron-chromium bar and rod for acid plants and seawater service, where standard stainless grades fall short.
Molybdenum and Copper Reported per Heat
Because these two elements govern acid performance, they appear on every EN 10204 3.1 certificate.
Hardness Records for Sour Service
For sour-service orders, NACE MR0175 / ISO 15156 documents ship with hardness data keyed to each heat number.
Annealing Range Recorded on Release
Consequently, the 927–1010 °C anneal actually used for your bar is written into the release record.
PRODUCT OVERVIEW
About Incoloy 825 Bar and Rod
Incoloy 825 Bar and Rod is supplied in UNS N08825 / W.Nr. 2.4858, a titanium-stabilised nickel-iron-chromium alloy. Because molybdenum and copper sit in the mix, it resists reducing and oxidising acids, chloride pitting, and stress-corrosion cracking.
Southerly Alloy ships Incoloy 825 bar and rod, annealed, hot-finished or cold-drawn to ASTM B425 and ASME SB425. In addition, we cut round, hex, and forged sections to your lengths; every lot ships with an EN 10204 3.1 certificate. For high-temperature oxidizing duty beyond 825's corrosion range, buyers often review our Incoloy 800 / 800H / 800HT Bar and Rod, the same iron-nickel-chromium family as 825. In addition, the Incoloy 825 material page sets out the alloy data behind the bar order.
PRODUCT FEATURES
Key Features of Incoloy 825 Bar and Rod
Incoloy 825 is a titanium-stabilised nickel-iron-chromium alloy with molybdenum and copper additions that resist reducing and oxidising acids, chloride pitting and stress-corrosion cracking. Southerly Alloy supplies UNS N08825 bar and rod to ASTM B425 in annealed, hot-finished and cold-drawn conditions, with custom sizes, surface finishes and mill test documentation. Sulfuric acid plants, seawater-cooled exchangers, and sour-service oil and gas projects are typical buyers of this bar.
Incoloy 825
Reducing and Oxidising Acid Resistance
Because molybdenum and copper work together, they handle sulfuric, phosphoric and nitric acid duty.
01
Chloride SCC Resistance
As a result, high nickel content resists stress-corrosion cracking in chloride-bearing process streams.
02
Pitting and Crevice Resistance
In addition, molybdenum raises localised corrosion resistance in seawater and chloride solutions.
03
Titanium-Stabilised Structure
Because titanium ties up carbon, welded joints keep their intergranular corrosion resistance.
04
Sour-Service Approval
Incoloy 825 holds NACE MR0175 / ISO 15156 approval for H2S-bearing oil and gas duty.
05
Cold-Worked Strength Increase
Drawing lifts yield strength well above the annealed minimum for shafts and fasteners.
06
One Grade, Many Media
A single alloy serves acid, alkali, and seawater circuits across one plant.
07
Documented Heat Identity
Every bar ships with an EN 10204 3.1 certificate tied to its heat number.
08
WHY CHOOSE US
Why Choose Incoloy 825
Annealing, finishing and inspection of every bar follow one written route. Consequently, the dates and documents we quote are dates we can hold. Before cutting, we verify the chemical composition for acid-resistant service and the sour-service hardness requirements against your project specification.
01
Project Chemistry Matched
We confirm molybdenum, copper, and titanium targets against your specification before we work the heat.
02
Heat-Level Traceability
In addition, certificates, hardness records, and PMI data follow the bar, compiled per heat.
03
Trial-to-Container Supply
One test bar and a full order run through the same annealed production route.
04
Technical Response
Mill metallurgists answer acid-duty, hardness-limit, and documentation questions.
MANUFACTURING PROCESS
Reliable Production For Critical Applications
We melt Incoloy 825 bar from nickel, chromium, iron, molybdenum, and copper and add titanium for stabilisation. Each heat is annealed between 927 and 1010 °C, then finished to the ordered condition. As a result, chemistry and test results stay linked to the heat number.
01
Charge Weighing
We weigh nickel, chromium, iron, molybdenum, and copper to the UNS N08825 window.
02
Melting and Refining
Next, we melt and refine the charge through AOD or VOD to keep carbon and gas content within limits.
03
Titanium Addition
We then add titanium to target so carbon stays tied up and the bar resists intergranular attack.
04
Hot Working
After that, we forge and roll ingots to bar section, refining the cast structure as the size reduces.
05
Annealing
We anneal the bar between 927 and 1010 °C and rapidly cool it to restore corrosion resistance.
06
Cold Finishing
Drawing, peeling, or centreless grinding then brings the bar to the ordered diameter, tolerance and surface.
07
Pickling and Passivation
We remove scale and oxide so the surface stays clean for acid service.
08
Final Verification
Finally, we check chemistry, tensile properties, hardness, and dimensions before we release the bar.
Manufacturing Facility
MANUFACTURING CAPABILITY
Advanced Production For Nickel Alloy Products
We produce Incoloy 825 bar in stock and made-to-order diameters and fix the annealed or cold-drawn condition before cutting. The figures below cover the melting, annealing and testing capacity behind that commitment. In addition, we schedule sour-service and acid-duty orders on the same qualified route.
20,000+ m²
Factory Area
Melting, rolling, annealing and pickling lines share one works.
50+
Production Machines
Specifically, units run hot working, annealing, drawing and surface finishing.
600 Tons
Monthly Capacity
In total, nickel-iron-chromium bar output spans stock and custom diameters.
30+
Technical Engineers
Moreover, metallurgists review acid-duty and sour-service specifications with you.
NACE MR0175
Sour-Service Scope
Incoloy 825 bar meets NACE MR0175 / ISO 15156 for sour service, and we provide heat-specific hardness and chemistry records when your order requires them.
QUALITY ASSURANCE
Strict Quality Control From Production To Delivery
We release no bar until we prove the ordered ASTM B425 requirements on the heat. Because the heat matters, a spectrometer confirms chemistry against the N08825 window. In addition, we record tensile, hardness, and A262 intergranular results where your specification requires them.
01
Chemistry Against N08825
We measure molybdenum and copper levels per heat and check them against the ASTM B425 limits.
02
Mechanical Testing on the Ordered Condition
For the condition actually shipped, we record tensile and hardness results.
03
Surface and Dimensional Checks
We measure diameter, straightness, and finish to the applicable B425 tolerance class, adding PMI where specified.
04
Heat-Linked Documentation
Consequently, certificates carry the heat number, so incoming inspection can trace any bar back to its test data.
PRODUCT FORMS
Available Product Forms
Round bar and rod carry most Alloy 825 enquiries, and each form below now has a dedicated page of its own. Meanwhile, every form is still quoted with its own condition, tolerance and finish route. In addition, we agree the machining allowance with the order.
02
Incoloy 825 Round Rod
Smaller drawn stock with controlled straightness fits fasteners and instrument fittings.
View Incoloy 825 Round Rod →
03
Incoloy 825 Bright Bar
Cold-drawn finish with tight diameter control suits automatic lathes.
View Incoloy 825 Bright Bar →
04
Incoloy 825 Cold-Drawn Bar
Higher yield strength from the as-drawn condition, stress-relieved where straightness matters.
View Incoloy 825 Cold-Drawn Bar →
05
Incoloy 825 Hex Bar
Hexagonal sections sized across flats suit bolting and multi-flat valve components.
View Incoloy 825 Hex Bar →
06
Incoloy 825 Square Bar
Square sections cut to width and length serve supports and fabricated frames.
View Incoloy 825 Square Bar →
07
Incoloy 825 Flat Bar
Rectangular sections supplied to specified thickness and width serve scrubber and duct hardware.
View Incoloy 825 Flat Bar →
08
Incoloy 825 Forged Bar
Larger diameters and shaped sections with a controlled wrought structure suit heavy valve bodies.
View Incoloy 825 Forged Bar →
09
Incoloy 825 Centreless-Ground Rod
Ground diameter and straightness held for spindle, pin and plunger work.
View Incoloy 825 Centreless-Ground Rod →
10
Incoloy 825 Threaded Rod
Fully threaded bar and studs cut from B425 stock, with hardness records for NACE sour orders.
View Incoloy 825 Threaded Rod →
11
Incoloy 825 Wire
Fine and spring-temper wire to BS 3075 NA16 for demister pads, mesh baskets and instrument work.
View Incoloy 825 Wire →
12
Incoloy 825 Welding Wire
ERNiFeCr-1 bare wire and ENiCrMo-3 electrodes that carry the acid resistance of the parent metal.
View Incoloy 825 Welding Wire →
APPLICATIONS
Engineered For Demanding Industries
Because one material faces both acid attack and chloride cracking, buyers select Alloy 825 bar for these duties. Most of our 825 bar goes to acid plants, seawater exchangers, and sour-service oil and gas projects. Therefore, tell us the medium, concentration, and temperature at quotation.
Discuss Your Application →
01
Sulfuric Acid Plant Hardware
Pump shafts, agitators and valve trim in pickling and acid regeneration service.
02
Phosphoric Acid Production
Mixer shafts, slurry pump parts and fittings in wet-process acid duty.
03
Seawater-Cooled Heat Exchangers
Tubesheet, baffle and support components resisting chloride pitting.
04
Pollution Control Scrubbers
Spray headers, dampers and duct supports in flue-gas desulfurisation systems.
05
Oil and Gas Sour Service
Wellhead, tree and valve components for H2S-bearing production duty.
06
Chemical Process Vessels
Internals, dip tubes and agitator shafts in mixed-acid process streams.
07
Nuclear Fuel Reprocessing
Hardware for nitric acid and solvent extraction circuits where specified.
08
Pulp and Paper Digesters
Digester fittings, blow-line parts and bleach-plant hardware.
TECHNICAL INFORMATION
Technical Specifications
Detailed technical information including chemical composition, mechanical properties, standards and available dimensions.
Chemical Composition
The limits below follow ASTM B425 for UNS N08825 bar and rod, with iron as the balance of the melt. Because molybdenum and copper set the acid-resistance balance while titanium stabilises the structure, the mill test certificate governs final acceptance.
| Element | Content |
|---|---|
| Nickel (Ni) | 38.0–46.0% |
| Chromium (Cr) | 19.5–23.5% |
| Iron (Fe) | 22.0% min. |
| 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) | 1.00% max. |
| Silicon (Si) | 0.50% max. |
| Aluminium (Al) | 0.20% max. |
| Sulfur (S) | 0.03% max. |
Mechanical Properties
Values below separate the ASTM B425 minimums from results typically measured on annealed bar. The standard sets one condition for rod and bar; therefore, we agree cold-drawn or high-strength requirements at quotation. Confirm the ordered condition with your enquiry.
| Condition | Tensile Strength | Yield Strength (0.2%) | Elongation | Hardness |
|---|---|---|---|---|
| Annealed — ASTM B425 minimum | ≥85 ksi (586 MPa) | ≥35 ksi (241 MPa) | 30% | 200 HB max. |
| Annealed bar — typical values | 100 ksi (690 MPa) | 47 ksi (324 MPa) | 45% | Approx. 75 HRB |
Alloy 825 is not age-hardenable, so any strength above the annealed minimum comes from cold work. Bar for sour service is usually ordered to a hardness ceiling as well as a strength floor.
Physical Properties
Typical room-temperature values below support design work rather than acceptance testing. In addition, Alloy 825 stays non-magnetic across its working range, which suits instrument and magnetically sensitive assemblies.
| Property | Value |
|---|---|
| Density | Approx. 8.14 g/cm³ |
| Melting range | Approx. 1370–1400 °C |
| Modulus of elasticity | Approx. 196 GPa |
| Thermal conductivity at 20 °C | Approx. 11.1 W/m·K |
| Specific heat at 20 °C | Approx. 440 J/kg·K |
| Electrical resistivity at 20 °C | Approx. 1.13 µΩ·m |
| Thermal expansion, 20–100 °C | Approx. 14.1 µm/m·K |
| Curie temperature | Below −196 °C |
| Magnetic behaviour | Non-magnetic at ambient temperature |
Standards
ASTM B425 governs bar and rod; ASME SB425 serves pressure equipment. Specifically, the designations below are cross-reference identifiers rather than separate approvals. For sour service, orders also reference NACE MR0175 / ISO 15156. ASTM International publishes the full specification.
| Standard / Designation | Scope |
|---|---|
| ASTM B425 | Nickel-iron-chromium-molybdenum-copper alloy rod and bar — UNS N08825 |
| ASME SB425 | ASME edition for rod and bar |
| ASTM B564 / ASME SB564 | Nickel alloy forgings — UNS N08825 |
| ASTM B424 / B163 / B423 | Plate, sheet, seamless tube and pipe in the same grade |
| NACE MR0175 / ISO 15156 | Sour service in oil and gas production |
| UNS N08825 | Material designation for Incoloy 825 |
| W.Nr. 2.4858 / NiCr21Mo | European designation for Alloy 825 |
| BS 3076 NA16 | British nickel-iron-chromium bar standard |
| DIN 17752 / DIN 17753 / DIN 17754 | Wrought nickel alloys — bar, wire and forging stock |
| VdTÜV 432 | German pressure vessel material data sheet |
| ISO 9723 / ISO 9724 / ISO 9725 | Nickel alloy bar, wire and forging stock |
| JIS NCF 825 | Japanese designation |
Dimensions
Ranges below reflect normally produced sections; however, exact availability depends on condition, finish, and quantity, confirmed at quotation. Tolerances follow ASTM B425 for the ordered condition. Therefore, state diameter, section, length, and finish in the inquiry.
| Product Form | Typical Supply | Length |
|---|---|---|
| Round Bar | 6–500 mm dia. | Cut to length or random |
| Round Rod | 3–50 mm dia. | Cut to length |
| Bright Bar | 6–150 mm dia. | Cut to length or random |
| Square Bar | 10–150 mm | Cut to length or random |
| Hex Bar | 10–150 mm A/F | Cut to length or random |
| Flat Bar | 3–100 mm thick × 10–300 mm wide | Cut to length |
| Forged Bar | 100–500 mm dia. or forged section | Cut to length |
| Centreless-Ground Rod | 3–100 mm dia., tight tolerance | Cut to length |
We review diameters and lengths outside these ranges against the production route before quotation.
Surface Finishes
You choose the finish for the next operation, whether machining allowance, acid-service exposure, or a painted assembly. Availability depends on diameter, condition, and order quantity. In addition, we agree each finish with the order rather than assume it from stock.
| Surface Condition | Typical Use |
|---|---|
| Annealed and pickled | Standard delivery for acid and seawater service |
| Hot-worked (as-rolled or forged) | Parts that will be machined to size |
| Cold drawn | Close diameter control with a brighter surface |
| Peeled | Uniform diameter with a machined skin for further turning |
| Centreless ground | Tight diameter and straightness for shafting |
| Polished | Reduced roughness for product-contact and visible parts |
| Rough turned | Machining allowance held on large or forged bar |
TECHNICAL DOCUMENTATION
Download Technical Datasheet
Get detailed information including specifications, standards, dimensions and material properties.
HOW TO START
Start Your Order in 6 Simple Steps
One coordinator keeps your Incoloy 825 order moving from enquiry to shipment. We fix the annealing route before we cut the bar, and the technical team reviews acid duty.
1
Send the Medium Details
First, give the medium, concentration, temperature, diameter, length, and quantity.
2
Confirm the Condition
Next, agree annealed, hot-finished, or cold-drawn against your machining route.
3
Receive a Quotation
Then, price, lead time, and document set come back in one reply.
4
Approve the Specification
After that, we record grade, dimensions, inspection level, and delivery terms before cutting.
5
Produce and Test
We then work, anneal, and test the heat to the ordered condition.
6
Release and Ship
Finally, certificates and export paperwork travel with the bar; we confirm delivery terms with you.
CERTIFICATIONS & QUALITY DOCUMENTATION
Certifications & Quality Documentation
Our production and inspection processes are certified to international standards, and every delivery ships with EN 10204 3.1 mill test certificates.
ISO 9001:2015
Quality Management System
PED 2014/68/EU
Pressure Equipment Directive
ASTM / ASME
Material Standards Compliance
EN 10204 3.1
Mill Test Certificates
FAQ
Frequently Asked Questions
Which ASTM specification covers Incoloy 825 bar and rod?
ASTM B425 / ASME SB425.
Is Incoloy 825 bar resistant to sulfuric acid?
Yes. It is used across a wide range of sulfuric acid concentrations, subject to temperature limits.
Is Incoloy 825 bar approved for sour service?
Yes. NACE MR0175 / ISO 15156, with hardness recorded per heat.
Which sizes of Incoloy 825 bar can you supply?
6–500 mm round bar, with rod from 3 mm and hex, square, and flat sections to 150 mm.
Can you supply custom Incoloy 825 bar and rod?
Yes. Drawing, peeling, grinding, and cut-to-length cover sizes outside stock.
What is your MOQ for Incoloy 825 bar?
One bar for most stock diameters.
What are your trade terms for Incoloy 825 bar?
Mainly FOB; we also quote EXW and CIF.
How is the price of Incoloy 825 bar calculated?
Mainly on weight, with the nickel, molybdenum, and copper share fixed in the quotation.
What is the lead time for Incoloy 825 bar?
7-15 days for stock sizes; about 25 days for made-to-order annealed bar.
Do you provide EN 10204 3.1 or 3.2 certificates?
Yes. 3.1 comes with every heat, and we arrange 3.2 and third-party witness on request.
REQUEST FOR QUOTATION
Need A Custom Alloy Solution?
Send the medium, concentration, temperature, and dimensions you need, and we will reply with price, lead time, and documents in one message. Because we fix the condition and inspection level before production, the bar you approve is the bar that ships.
Moreover, we hold Incoloy 825 bar and rod in common diameters and produce to your drawing. We also accept single-bar trials for most sizes.
