ASTM B425 UNS N08825 Alloy 825 Round Bar
Incoloy 825 Nickel Alloy Round Bar Supplier
ASTM B425 UNS N08825 Alloy 825 round bar is a nickel-iron-chromium-molybdenum-copper alloy bar supplied for corrosion-resistant components in chemical processing, acid production, oil and gas, marine equipment and industrial engineering applications.
Alloy 825, also known as Incoloy 825 or UNS N08825, contains nickel, chromium, iron, molybdenum, copper and titanium. This alloy is designed to provide resistance to many corrosive environments, including reducing acids, oxidizing media, pitting, crevice corrosion and stress corrosion cracking.
We supply ASTM B425 UNS N08825 round bars in hot-finished, cold-drawn, annealed and custom-machined conditions according to customer drawings, project specifications and inspection requirements.
Product Specifications
| Item | Description |
|---|---|
| Product Name | ASTM B425 UNS N08825 Alloy 825 Round Bar |
| Material Grade | Alloy 825 / UNS N08825 / Incoloy 825 |
| Material Type | Nickel-Iron-Chromium-Molybdenum-Copper Alloy |
| Product Form | Round Bar / Rod / Square Bar / Hex Bar / Flat Bar |
| Main Standard | ASTM B425 / ASME SB425 |
| Related Standard | ASTM B564 / ASME SB564 for forgings and forging stock when applicable |
| Condition | Hot Finished / Cold Drawn / Annealed / Forging Quality |
| Diameter Range | 3 mm – 500 mm |
| Length | 1,000 mm – 6,000 mm or custom cut length |
| Surface Finish | Black / Peeled / Turned / Polished / Ground |
| Certificate | EN 10204 3.1 Material Certificate available |
| Inspection | Chemical, Mechanical, Dimensional, Visual, PMI and UT upon request |
Available Size Range
ASTM B425 UNS N08825 Alloy 825 round bars can be supplied in standard sizes or customized dimensions according to project requirements.
| Parameter | Available Range |
|---|---|
| Diameter | 3 mm – 500 mm |
| Length | 1,000 mm – 6,000 mm |
| Custom Length | Available upon request |
| Surface | Black, peeled, turned, polished or ground |
| Condition | Annealed, hot finished or cold drawn |
| Cutting | Fixed length cutting available |
Final size availability depends on diameter, production route, heat treatment condition, tolerance, surface finish, inspection requirement and order quantity.
What Is ASTM B425 UNS N08825 Alloy 825 Round Bar?
astm-b425 UNS N08825 round bar is a nickel alloy bar manufactured according to ASTM B425, a standard specification for nickel-iron-chromium-molybdenum-copper alloy rod and bar.
UNS N08825 is commonly known as Alloy 825 or Incoloy 825. It provides a strong combination of corrosion resistance, mechanical strength, weldability and resistance to both oxidizing and reducing environments.
ASTM B425 covers hot-finished and cold-drawn bars in different shapes, including rounds, squares, hexagons and rectangles. For round bar applications, ASTM B425 is the primary supply standard for Alloy 825 bar products.
Chemical Composition of UNS N08825
| Element | Composition % |
|---|---|
| Nickel, Ni | 38.0 – 46.0 |
| Chromium, Cr | 19.5 – 23.5 |
| Iron, Fe | Balance |
| Molybdenum, Mo | 2.5 – 3.5 |
| Copper, Cu | 1.5 – 3.0 |
| Titanium, Ti | 0.6 – 1.2 |
| Carbon, C | ≤ 0.05 |
| Manganese, Mn | ≤ 1.00 |
| Silicon, Si | ≤ 0.50 |
| Sulfur, S | ≤ 0.03 |
| Aluminum, Al | ≤ 0.20 |
The final chemical composition shall be confirmed according to the applicable ASTM B425 version, purchase specification and material test certificate.
Mechanical Properties
| Alloy | Condition | Tensile Strength Min | Yield Strength 0.2% Min | Elongation Min |
|---|---|---|---|---|
| UNS N08825 | Annealed, hot-finished or cold-drawn | 85 ksi / 586 MPa | 35 ksi / 241 MPa | 30% |
| UNS N08825 | Forging quality | Chemical requirements and surface inspection only | Not required | Not required |
Mechanical properties may vary according to bar diameter, manufacturing condition, heat treatment and applicable specification. Final acceptance shall be based on the material test certificate and project requirements.
Corrosion Resistance
Alloy 825 round bar is selected for applications requiring resistance to aggressive corrosive environments.
Key corrosion resistance features include:
- Resistance to sulfuric acid environments
- Resistance to phosphoric acid service
- Resistance to chloride stress corrosion cracking
- Resistance to pitting and crevice corrosion
- Resistance to intergranular corrosion
- Good performance in both oxidizing and reducing media
The nickel content supports resistance to chloride-ion stress corrosion cracking. Molybdenum and copper improve resistance to reducing acids, while chromium contributes to resistance in oxidizing environments.
Applications of Alloy 825 Round Bar
ASTM B425 UNS N08825 Alloy 825 round bars are used in corrosion-resistant and high-performance industrial components.
Chemical Processing
- Sulfuric acid piping components
- Phosphoric acid equipment
- Acid production equipment
- Pickling equipment
- Heat exchanger components
- Chemical plant fasteners and shafts
Oil and Gas
- Sour service components
- Valve parts
- Pump shafts
- Downhole equipment components
- Corrosion-resistant machined parts
Marine and Offshore
- Marine corrosion-resistant shafts
- Offshore equipment components
- Seawater service parts
- Exhaust and scrubber system components
Industrial Equipment
- Pollution control equipment
- Food and water processing equipment
- Tank truck components
- Pressure equipment components
- Custom machined nickel alloy parts
ASTM B425 vs ASTM B564
| Standard | Product Scope | Typical Product Form | Use on This Page |
|---|---|---|---|
| ASTM B425 | Nickel-iron-chromium-molybdenum-copper alloy rod and bar | Round bar, square bar, hex bar, rectangular bar | Main standard for UNS N08825 Alloy 825 round bar |
| ASME SB425 | ASME version of ASTM B425 | Rod and bar | Used for pressure equipment projects when ASME specification is required |
| ASTM B564 | Nickel alloy forgings and forging stock | Forged bar, forging stock, forged components | Related standard when forged components or forging stock are required |
| ASME SB564 | ASME version of ASTM B564 | Forgings and forging stock | Used for ASME pressure-related forged parts |
For Alloy 825 round bar supply, ASTM B425 is normally the main standard. If the customer requires forging stock or forged components, ASTM B564 may be applicable.
Manufacturing and Processing Options
We can supply Alloy 825 round bar with the following options:
- Hot finished bar
- Cold drawn bar
- Annealed bar
- Forging quality bar
- Peeled and turned bar
- Centerless ground bar
- Precision cut length
- CNC machined bar component
- Custom surface finish
- Export packing
Production and processing can be arranged according to customer drawings, machining allowance, tolerance, end-use application and inspection requirements.
Inspection and Quality Control
Each batch of ASTM B425 UNS N08825 round bar can be inspected according to project requirements.
Chemical Analysis
Chemical composition can be tested and reported according to ASTM B425 and customer specifications.
Mechanical Testing
Mechanical testing can include:
- Tensile strength
- Yield strength
- Elongation
- Hardness test when required
Dimensional Inspection
Dimensional control can include:
- Diameter
- Length
- Straightness
- Roundness
- Surface condition
- Cutting tolerance
Optional Testing
Optional inspection can be arranged upon request:
- PMI test
- Ultrasonic testing
- Surface inspection
- Third-party inspection
- Material traceability review
- Final dimensional report
Certificates and Documents
Available documents include:
- EN 10204 3.1 Material Certificate
- Chemical Composition Report
- Mechanical Test Report
- Heat Treatment Record when applicable
- PMI Report upon request
- UT Report upon request
- Dimensional Inspection Report
- Packing List
- Certificate of Origin
- Third-Party Inspection Report upon request
Custom Alloy 825 Round Bar Supply
We supply ASTM B425 UNS N08825 Alloy 825 round bars according to customer size, grade, condition and inspection requirements.
Please provide the following information for quotation:
| Required Information | Example |
|---|---|
| Material Grade | UNS N08825 / Alloy 825 / Incoloy 825 |
| Standard | ASTM B425 / ASME SB425 |
| Diameter | 50 mm |
| Length | 3,000 mm or cut length |
| Quantity | Pieces, meters or kilograms |
| Condition | Annealed / Hot Finished / Cold Drawn |
| Surface | Black / Peeled / Turned / Polished / Ground |
| Inspection | EN 10204 3.1, PMI, UT, dimensional report |
| Application | Chemical processing, oil and gas, marine or machined component |
Frequently Asked Questions
What is ASTM B425 UNS N08825 round bar?
ASTM B425 UNS N08825 round bar is a nickel-iron-chromium-molybdenum-copper alloy bar supplied under ASTM B425 for corrosion-resistant industrial components.
Is Alloy 825 the same as Incoloy 825?
Alloy 825 and Incoloy 825 are commonly used names for UNS N08825 nickel alloy. Incoloy 825 is a trade name, while UNS N08825 is the unified numbering system designation.
What is Alloy 825 round bar used for?
Alloy 825 round bar is used for chemical processing equipment, sulfuric acid service, phosphoric acid equipment, oil and gas components, marine equipment, pollution control equipment and corrosion-resistant machined parts.
What standard is used for Alloy 825 round bar?
ASTM B425 is the main standard for UNS N08825 Alloy 825 rod and bar. ASME SB425 may be required for pressure equipment projects.
What is the difference between ASTM B425 and ASTM B564?
ASTM B425 covers nickel alloy rod and bar, including round bar. ASTM B564 covers nickel alloy forgings and forging stock. For standard Alloy 825 round bar, ASTM B425 is normally used.
What is the chemical composition of UNS N08825?
UNS N08825 contains nickel, chromium, iron, molybdenum, copper and titanium. Typical composition includes Ni 38.0–46.0%, Cr 19.5–23.5%, Mo 2.5–3.5%, Cu 1.5–3.0% and Ti 0.6–1.2%, with iron as balance.
What mechanical properties are required for ASTM B425 UNS N08825?
For annealed UNS N08825 bar, typical ASTM B425 minimum mechanical properties are tensile strength 85 ksi / 586 MPa, yield strength 35 ksi / 241 MPa and elongation 30%.
Can you supply Alloy 825 round bar with EN 10204 3.1 certificate?
Yes. EN 10204 3.1 material certificate, chemical composition report, mechanical test report and dimensional inspection report can be supplied when required.
Can Alloy 825 round bar be cut to size?
Yes. Alloy 825 round bar can be supplied in full length or cut length according to customer drawings, machining allowance and project requirements.
What size range can you supply?
We can supply Alloy 825 round bars from 3 mm to 500 mm diameter, with standard or custom lengths depending on stock availability, production capability and order quantity.
Request a Quote
Send us your ASTM B425 UNS N08825 Alloy 825 round bar requirement.
Please include:
- Material grade
- Standard
- Diameter and length
- Quantity
- Condition
- Surface finish
- Certificate and inspection requirements
- End-use application
- Drawing or technical specification if available
Our technical team will review your requirement and provide a suitable quotation for Alloy 825 round bar supply.
