Incoloy 825 (UNS N08825) Round Bar, Seamless Tube & Plate Supplier | Shanghai Hangbo Alloy Group

By Shanghai Hangbo Alloy Group Co., Ltd. | ISO 9001:2015 Certified | 2026

Quick Answer: What Is Incoloy 825?

Incoloy 825 (UNS N08825 / W.Nr. 2.4858) is a nickel-iron-chromium alloy with significant additions of molybdenum, copper, and titanium. It is specifically designed to provide exceptional resistance to many corrosive environments, particularly those involving reducing and oxidizing acids, stress-corrosion cracking, and localized attack such as pitting and crevice corrosion. Its stabilized structure resists intergranular corrosion even after welding.

Product Overview

Incoloy 825 (UNS N08825) is a versatile nickel-base alloy belonging to the Incoloy series, developed to fill the gap between austenitic stainless steels and high-nickel alloys. Its chemistry is balanced to offer superior resistance to sulfuric and phosphoric acids. The molybdenum and copper content enhance resistance to reducing media, while the chromium content provides resistance to oxidizing conditions like nitric acid and nitrates.

Key properties include:

• Exceptional Resistance to Stress-Corrosion Cracking (SCC): The high nickel content makes it virtually immune to chloride-induced SCC.
• Superior Localized Corrosion Resistance: Effectively resists pitting and crevice corrosion in chloride environments.
• High-Temperature Stability: Maintains good mechanical properties from cryogenic temperatures up to approximately 540°C (1000°F).

Incoloy 825 is a critical material in industries such as Chemical Processing, Oil & Gas production, Acid Production, and Nuclear Fuel Reprocessing. Founded in 2012, Shanghai Hangbo Alloy Group Co., Ltd. is an ISO 9001:2015 certified manufacturer with a global distribution network across 32 countries, ensuring premium material supply and expert technical support.

Executive Standards

Incoloy 825 is produced and certified according to major international standards to ensure consistency and reliability across global engineering projects.

Chemical Composition (ASTM B425 / B424)

Shanghai Hangbo Alloy Group performs 100% Optical Emission Spectroscopy (OES) verification on every heat to guarantee compliance with specified chemical limits.

Mechanical & Physical Properties

Incoloy 825 offers a stable combination of strength and ductility. Its mechanical properties are reliable for structural components under high-corrosion stress.

Room-Temperature Mechanical Properties (Annealed)

High-Temperature Strength Retention

One of Incoloy 825's SEO differentiators is its ability to maintain structural integrity at elevated temperatures.

How Shanghai Hangbo Produces Incoloy 825

We utilize a zero-defect manufacturing philosophy to ensure the highest material quality for our global clients.

1. Incoloy 825 Round Bar & Forging

1. Melting: Vacuum Induction Melting (VIM) followed by Electroslag Remelting (ESR) to ensure ultra-low inclusion levels and uniform chemistry.
2. Forging: Precision hot forging using controlled temperature ranges to optimize grain structure.
3. Heat Treatment: Solution annealing to dissolve any precipitated phases, followed by water quenching.
4. Finishing: Precision centerless grinding or peeling to achieve h9/h11 tolerances.

2. Incoloy 825 Seamless Tube & Pipe

1. Billet Preparation: Cutting and centering of ESR-melted billets.
2. Extrusion/Piercing: Hot extrusion followed by cold pilgering or cold drawing to achieve final dimensions.
3. Annealing: Bright annealing in a hydrogen atmosphere to maintain a clean surface and high corrosion resistance.
4. Testing: 100% Eddy Current (ET) and Hydrostatic testing to ensure pressure integrity.

3. Incoloy 825 Sheet, Plate & Strip

1. Rolling: Hot rolling of slabs followed by cold rolling for thinner gauges to achieve precise thickness and smooth finish.
2. Surface Treatment: Solution annealing followed by pickling or bright annealing.
3. Inspection: Ultrasonic Testing (UT) per ASTM A578 to verify internal soundness.
4. Cutting: Custom cut-to-size using laser, plasma, or waterjet cutting.

Industry Applications

Incoloy 825's exceptional resistance to a variety of acids makes it indispensable in harsh industrial environments.

Quality Assurance: 7-Stage Zero-Defect Inspection

Shanghai Hangbo Alloy Group ensures 100% reliability through our proprietary 7-stage inspection protocol:

1. OES/PMI Verification: 100% heat analysis and Positive Material Identification on all outgoing products.
2. UT (Ultrasonic Testing): Per ASTM A388 or ASTM E2375 to detect any internal discontinuities in bars and forgings.
3. ET (Eddy Current Testing): 100% NDT for seamless tubes to detect surface and sub-surface defects per ASTM E309.
4. Hydrostatic Testing: Verification of pressure-bearing capacity for pipes and tubes.
5. Mechanical Testing: Tensile, yield, elongation, and impact testing in our ISO 17025 accredited laboratory.
6. Dimensional Report: Full measurement report including Ra surface roughness verification.
7. Visual Inspection: Final check for surface finish, marking, and packaging integrity.

Every shipment is accompanied by an EN 10204 3.1 Mill Test Certificate (MTC). Third-party inspection by SGS, TÜV, or BV is available upon request.

Frequently Asked Questions (FAQ)

Q1: What is Incoloy 825 used for?

Incoloy 825 is primarily used for handling aggressive acids (sulfuric, phosphoric, nitric) in chemical processing, oil and gas piping, nuclear fuel reprocessing, and pollution control equipment.

Q2: What is the maximum service temperature for Incoloy 825?

While it maintains oxidation resistance at higher temperatures, its maximum recommended service temperature for structural applications is typically 540°C (1000°F) to avoid phase embrittlement.

Q3: How does Incoloy 825 compare to Inconel 625?

Inconel 625 has higher nickel and molybdenum content, offering higher strength and better resistance at much higher temperatures. Incoloy 825 is a more cost-effective solution specifically optimized for sulfuric and phosphoric acid service at moderate temperatures.

Q4: How does Incoloy 825 compare to Stainless Steel 316L?

Incoloy 825 offers vastly superior resistance to stress-corrosion cracking and localized corrosion (pitting/crevice) in chloride and acid environments where 316L would fail rapidly.

Q5: What product forms does Shanghai Hangbo supply?

We supply Incoloy 825 in round bars, hex bars, forgings, seamless pipes, tubes, plates, sheets, strips, and wire.

Q6: What certifications come with the material?

All materials come with a full EN 10204 3.1 MTC, ISO 9001:2015 certification, and compliance with ASTM/ASME standards.

Q7: What is the price of Incoloy 825 per kg?

Pricing is influenced by the current LME nickel/molybdenum prices and the specific product form (e.g., seamless tube vs. bar). Contact us for an immediate, competitive quote.

Q8: Does Shanghai Hangbo ship internationally?

Yes. We have a robust logistics network shipping to over 32 countries with door-to-door delivery and DDP options available.

Contact & CTA

Shanghai Hangbo Alloy Group provides one-on-one technical consultation and comprehensive alloy solutions.

Response time: within 10 minutes. Support for OEM/ODM. Reliable delivery to 32 countries.

Related Grades

• Inconel 625 (UNS N06625)
• Incoloy 800H (UNS N08810)
• Incoloy 925 (UNS N09925)
• Hastelloy C276 (UNS N10276)

Shanghai Hangbo Alloy Group Co., Ltd. — Your Trusted Partner in High-Performance Special Alloys.