01
Incoloy 825 Round Bar
Solid rounds from 6 to 500 mm for pump shafts, valve trim and machined acid-plant parts.
Request Availability →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
The two elements governing acid performance appear on every EN 10204 3.1 certificate.
Hardness Records for Sour Service
NACE MR0175 / ISO 15156 orders ship with hardness data keyed to each heat number.
Annealing Range Recorded on Release
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 (UNS N08825, W.Nr. 2.4858) is a titanium-stabilised nickel-iron-chromium alloy. Molybdenum and copper provide its resistance to 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. Round, hex, and forged sections are cut to your lengths, each lot with an EN 10204 3.1 certificate.
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
Molybdenum and copper together handle sulfuric, phosphoric and nitric acid duty.
01
Chloride SCC Resistance
High nickel content resists stress-corrosion cracking in chloride-bearing process streams.
02
Pitting and Crevice Resistance
Molybdenum raises localised corrosion resistance in seawater and chloride solutions.
03
Titanium-Stabilised Structure
Titanium ties up carbon so welded joints keep their intergranular corrosion resistance.
04
Sour-Service Approval
Listed in NACE MR0175 / ISO 15156 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
Your Incoloy 825 enquiry goes to the plant that melts, anneals, and finishes the bar, not to a reseller. Acid-resistant chemistry and sour-service hardness limits are checked against your project specification before cutting begins.
01
Project Chemistry Matched
Molybdenum, copper, and titanium targets are confirmed against your specification before the heat is worked.
02
Heat-Level Traceability
Certificates, hardness records, and PMI data are compiled per heat and follow the bar.
03
Trial-to-Container Supply
One test bar and a full order run through the same annealed production route.
04
Technical Response
Acid duty, hardness limits, and documentation questions are answered by the mill metallurgists.
MANUFACTURING PROCESS
Reliable Production For Critical Applications
Incoloy 825 bar is melted from nickel, chromium, iron, molybdenum, and copper, with titanium added for stabilisation. Each heat is annealed between 927 and 1010 °C, then finished to the ordered condition. Chemistry and test results stay linked to the heat number.
01
Charge Weighing
Nickel, chromium, iron, molybdenum, and copper are weighed to the UNS N08825 window.
02
Melting and Refining
The charge is melted and refined through AOD or VOD to keep carbon and gas content within limits.
03
Titanium Addition
Titanium is added to target so carbon stays tied up and intergranular attack is resisted.
04
Hot Working
Ingots are forged and rolled to bar section, refining the cast structure as the size reduces.
05
Annealing
Bar is annealed between 927 and 1010 °C and rapidly cooled to restore corrosion resistance.
06
Cold Finishing
Drawing, peeling, or centreless grinding brings the bar to the ordered diameter, tolerance and surface.
07
Pickling and Passivation
Scale and oxide are removed so the surface is clean for acid service.
08
Final Verification
Chemistry, tensile properties, hardness, and dimensions are checked before the bar is released.
Manufacturing Facility
MANUFACTURING CAPABILITY
Advanced Production For Nickel Alloy Products
Incoloy 825 bar is produced in stock and made-to-order diameters, with the annealed or cold-drawn condition fixed before cutting. The figures below cover the melting, annealing and testing capacity behind that commitment. Sour-service and acid-duty orders are scheduled on the same qualified route.
20,000+ m²
Factory Area
Melting, rolling, annealing and pickling lines in one works.
50+
Production Machines
Units for hot working, annealing, drawing and surface finishing.
600 Tons
Monthly Capacity
Nickel-iron-chromium bar output across stock and custom diameters.
30+
Technical Engineers
Metallurgists who review acid-duty and sour-service specifications with you.
NACE MR0175
Sour-Service Documentation
Requirements can be reviewed for sour-service applications, with heat-specific material traceability and hardness data available as required.
QUALITY ASSURANCE
Strict Quality Control From Production To Delivery
No bar leaves the works until the ordered ASTM B425 requirements are proven on the heat. Chemistry is confirmed by spectrometer against the N08825 window. Tensile, hardness, and A262 intergranular results are recorded where your specification requires them.
01
Chemistry Against N08825
Molybdenum and copper levels are measured per heat and checked against the ASTM B425 limits.
02
Mechanical Testing on the Ordered Condition
Tensile and hardness results are recorded for the condition actually shipped.
03
Surface and Dimensional Checks
Diameter, straightness, and finish are measured to the applicable B425 tolerance class, with PMI where specified.
04
Heat-Linked Documentation
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, with hex, square, flat and forged sections covering acid-plant work. Each form is quoted with its own condition, tolerance and finish route, and machining allowance is agreed with the order.
02
Incoloy 825 Round Rod
Smaller drawn stock with controlled straightness for fasteners and instrument fittings.
Request Availability →
03
Incoloy 825 Bright Bar
Cold-drawn finish with tight diameter control for automatic lathes.
Request Availability →
04
Incoloy 825 Cold-Drawn Bar
Higher yield strength from the as-drawn condition, stress-relieved where straightness matters.
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05
Incoloy 825 Hex Bar
Hexagonal sections sized across flats for bolting and multi-flat valve components.
Request Availability →
06
Incoloy 825 Square Bar
Square sections cut to width and length for supports and fabricated frames.
Request Availability →
07
Incoloy 825 Flat Bar
Rectangular sections supplied to specified thickness and width for scrubber and duct hardware.
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08
Incoloy 825 Forged Bar
Larger diameters and shaped sections with a controlled wrought structure for heavy valve bodies.
Request Availability →
09
Centreless-Ground Rod
Ground diameter and straightness held for spindle, pin and plunger work.
Request Availability →
APPLICATIONS
Engineered For Demanding Industries
Alloy 825 bar is selected where one material must face both acid attack and chloride cracking. Most of our 825 bar goes to acid plants, seawater exchangers, and sour-service oil and gas projects. 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. Molybdenum and copper set the acid-resistance balance, while titanium stabilises the structure against intergranular attack. 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, so cold-drawn or high-strength requirements are agreed 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. 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, with ASME SB425 used in pressure equipment. The designations below are cross-reference identifiers rather than separate approvals. Sour-service orders also reference NACE MR0175 / ISO 15156.
| 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; exact availability depends on condition, finish, and quantity, confirmed at quotation. Tolerances follow ASTM B425 for the ordered condition. 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 |
| Precision-Ground Rod | 3–100 mm dia., tight tolerance | Cut to length |
Diameters and lengths outside these ranges are reviewed against the production route before quotation.
Surface Finishes
Finish is chosen for the next operation, whether machining allowance, acid-service exposure, or a painted assembly. Availability depends on diameter, condition, and order quantity. Each finish is agreed with the order rather than assumed 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. The annealing route is fixed before the bar is cut, and acid duty is reviewed by the technical team.
1
Send the Medium Details
Give the medium, concentration, temperature, diameter, length, and quantity.
2
Confirm the Condition
Annealed, hot-finished, or cold-drawn is agreed upon against your machining route.
3
Receive a Quotation
Price, lead time, and document set come back in one reply.
4
Approve the Specification
Grade, dimensions, inspection level, and delivery terms are recorded before cutting.
5
Produce and Test
The heat is worked, annealed, and tested to the ordered condition.
6
Release and Ship
Certificates and export paperwork travel with the bar; delivery terms are confirmed with you.
What Our Clients Say
Feedback from buyers and engineers who source nickel alloy materials from Southerly Alloy.
★★★★★
“The Incoloy 825 rod for our phosphoric acid agitator arrived with molybdenum and copper on the certificate, exactly as our specification asked.”
★★★★★
“We ordered annealed 825 bar for a seawater exchanger retrofit; hardness records came with the mill certificate, so incoming inspection passed the first time.”
★★★★★
“One trial bar confirmed the pickled finish and straightness before we placed the full acid-plant order.”
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; EXW and CIF can be quoted as well.
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; 3.2 and third-party witness are arranged 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. The condition and inspection level are fixed before production, so the bar you approve is the bar that ships.
Incoloy 825 bar and rod are held in common diameters or produced to your drawing, and single-bar trials are accepted for most sizes.
