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Incoloy 825 Threaded Bars Overview
Aurum Overseas is a trusted Incoloy 825 Threaded Bars Supplier and Exporter, offering high-performance nickel fasteners made to ASTM B425 and ASME SB425 standards. Our ready stock of UNS N08825 Threaded Rods holds strong and provides exceptional resistance to both oxidizing and reducing acid solutions.
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Stabilized with Titanium (0.60–1.20%) and enriched with Copper (1.50–3.00%), these UNS N08825 Threaded Bars resist structural damage and stress cracking in hot sulfuric and phosphoric acids. Furthermore, durable Alloy 825 Threaded Bars stop pitting and crevice rust in harsh sour gas and seawater processing environments.
Built for chemical pickling equipment, offshore oil and gas production, and nuclear processing, our full-thread studs keep joints tight and secure. Contact Aurum Overseas for quick factory quotes, custom length cutting, and fast global shipping.
Technical Specifications
| Technical Parameter | Specification Standard |
|---|---|
| Material Specifications | ASTM B425, ASME SB425, EN 10204 3.1, ISO 9723 |
| UNS Designation | UNS N08825 (Incoloy 825 / Alloy 825) |
| Thread Size Range | M6 to M100 (1/4" to 4.0" Nominal Diameter) |
| Thread Profiles | UNC, UNF, UNEF, Metric Coarse, Metric Fine, Acme Threads |
| Length Options | 1,000 mm, 2,000 mm, 3,000 mm, Custom Cut-to-Length All-Thread Studs |
| Thread Class / Fit | Class 2A / 3A (Imperial) & 6g / 6h (Metric Profile Tolerances) |
| HSN Code | 75089090 |
Chemical Composition & Mechanical Properties
Equivalent Standards
| Grade | Standard | W.Nr. | UNS | JIS | EN |
|---|---|---|---|---|---|
| Incoloy 825 | ASTM B425 | 2.4858 | N08825 | NCF 825 | NiCr21Mo |
Chemical Composition (%)
| Chemical Element | Incoloy 825 (UNS N08825) |
|---|---|
| Nickel (Ni) | 38.00 – 46.00 |
| Chromium (Cr) | 19.50 – 23.50 |
| Iron (Fe) | 22.00 min |
| Copper (Cu) | 1.50 – 3.00 |
| Titanium (Ti) | 0.06 – 1.20 |
| Carbon (C) | 0.05 max |
| Manganese (Mn) | 1.00 max |
| Silicon (Si) | 0.50 max |
| Sulfur (S) | 0.03 max |
| Aluminum (Al) | 0.02 max |
Mechanical & Physical Properties
| Property Parameter | Value |
|---|---|
| Density | 8.14 g/cm³ |
| Melting Point | 1400 °C (2550 °F) |
| Tensile Strength (Min) | 550 MPa (80,000 Psi) |
| Yield Strength (0.2% Offset, Min) | 220 MPa (32,000 Psi) |
| Elongation (Min) | 30 % |
Key Advantages
Strong Acid Protection
Added Copper and Molybdenum stop thread rust and damage in harsh sulfuric, phosphoric, and nitric acid lines.
No Joint Weakness
Titanium stops cracking near welds, keeping your bolting strong even after heating or welding.
Resists Saltwater & Sour Gas
High 38–46% Nickel content protects studs from cracking and pitting in salt water and harsh oilfield gas.
Smooth & Secure Threading
Roll-threaded construction prevents thread stripping and jamming when tightening under heavy loads.
Quality Testing & Inspection
Aurum Overseas subjects every order to strict quality control processes to ensure compliance with international fastener standards and client specifications:
- Chemical Heat Verification (PMI): Spectro / XRF material analysis verifying exact elemental chemistry against ASTM standards.
- Thread Pitch & Gage Inspection: Go/No-Go thread gage and optical comparator testing ensuring class 2A/3A and 6g pitch tolerances.
- Mechanical Property Certification: Factory batch verification of tensile, yield strength, and elongation supported by EN 10204 3.1 MTRs.
- Optional Third-Party Testing: Ultrasonic (UT), Dye Penetrant (DPI), or Proof Load testing provided upon client project request.
Global Export Markets
As an established Incoloy 825 Threaded Bars Exporter, Aurum Overseas supplies fully certified ASTM B425 UNS N08825 threaded rods to global chemical processing, offshore oil & gas, nuclear, and acid service facilities:
USA
Canada
Mexico
Germany
United Kingdom
France
Italy
Netherlands
Belgium
Spain
Poland
UAE
Saudi Arabia
Qatar
Kuwait
Oman
Bahrain
Frequently Asked Questions
Incoloy 825 contains added Molybdenum (2.5–3.5%) and Copper (1.5–3.0%), which give it far superior resistance to reducing acids like sulfuric and phosphoric acid compared to Incoloy 800.
Yes. The high Nickel and Chromium content makes Alloy 825 highly resistant to sulfide stress cracking and pitting in sour oil and gas wells.
There is no physical or technical distinction. Both terms refer to continuously threaded bar stock used for stud bolting, structural anchoring, and flange clamping.
We offer metric coarse/fine (6g fit) and imperial UNC, UNF, UNEF, and Acme profiles (class 2A/3A) in custom cut lengths.
Contact Aurum Overseas
Contact a dedicated Incoloy 825 Threaded Bars Exporter and Incoloy 825 Threaded Bars Supplier for certified nickel alloy threaded rod stock, custom length sawing, and fast international delivery.