Incoloy 825 Strips: Corrosion-Resistant Alloy for Extreme Environments

Product Overview

Incoloy 825 Strips (UNS N08825) are precision-rolled nickel-iron-chromium-molybdenum-copper-titanium alloy strips designed for demanding high-temperature and corrosive environments. These strips combine solid-solution strengthening with a balanced chemical makeup to deliver tensile strengths up to 760 MPa and elongation above 30 % in the annealed condition. They resist both oxidizing and reducing acids, chloride stress-corrosion cracking, pitting, and intergranular attack, thanks to high levels of chromium and molybdenum plus copper and titanium additions. Service temperatures extend from cryogenic limits up to 816 °C continuously, with intermittent exposure to 982 °C, while maintaining oxidation and carburization resistance via protective chromia and alumina scales. Excellent ductility (elongation ≥ 30 %), weldability (TIG/GTAW, EB), and formability support stamping, slitting, fine-blanking, and coining for complex components like diaphragms, bellows, springs, and heat-exchanger fins. Conforming to ASTM B425/B424 (strip/foil), AMS 5599, and ISO 15156-3/NACE MR0175, Incoloy 825 Strips ensure global interchangeability and sour-service compatibility across chemical-processing, petrochemical, marine, power-generation, and nuclear industries.

Chemical Composition

The typical chemical composition of Incoloy 825 Strips is shown below:

Mechanical Properties

In the fully annealed condition, Incoloy 825 Strips exhibit the following mechanical properties:

Physical Properties

Key physical properties of Incoloy 825 Strips are as follows:

Conformance Standards

• ASTM B425 / ASME SB-425 – Strip and foil form

• ASTM B424 / ASME SB-424 – Plate, sheet, and strip

• AMS 5599 – Special-quality strip

• ISO 15156-3 / NACE MR0175-3 – Sour-service environments

• UNS N08825 / W. Nr. 2.4858 – Alloy designation

Applications

Incoloy 825 Strips are employed in:

• Chemical Processing: Reactors, heat-exchanger fins, bubbling caps in sulfuric and phosphoric acid service

• Petrochemical: Ammonia reformer coils, hydroprocessing equipment

• Marine & Offshore: Flare stack liners, subsea tubing, condenser fins

• Power Generation: Gas-turbine transition ducts, combustion liners, heat-exchanger panels

• Nuclear: Acid-handling components, fuel-reprocessing hardware

Frequently Asked Questions

Q1: Why choose Incoloy 825 Strips for acidic environments?
A1: Their high molybdenum and copper content enhances resistance to reducing acids (sulfuric, phosphoric), while chromium and nickel protect against oxidizing media and chloride stress-corrosion cracking.

Q2: What temperature range can Incoloy 825 Strips handle?
A2: Continuous service up to 816 °C, intermittent exposures to 982 °C, with stable mechanical and corrosion performance across this range.

Q3: Are Incoloy 825 Strips weldable and formable?
A3: Yes—weldable by TIG/GTAW and electron beam with minimal post-weld treatment; excellent ductility (elongation ≥ 30 %) supports stamping, slitting, and fine-blanking.

Wuxi Nickel New Material Co., Ltd. is a high-tech enterprise integrating the production, manufacturing, and research & development of specialty alloy materials. Located in Wuxi, Jiangsu Province, the company specializes in precision alloys, titanium alloys, high-temperature alloys, corrosion-resistant alloys, heat-resistant steels, nickel-based welding wires, and other specialty materials, with an annual production capacity of 5,000 tonnes. Our product range includes plates, bars, wires, and strips, which are widely used in industrial electric furnaces, power‐station boilers, petrochemical plants, aerospace, marine engineering, machinery, and electronic instrumentation. These materials are characterized by high electrical resistance, high‐temperature strength, corrosion resistance, wear resistance, and fatigue resistance. We can manufacture in compliance with national, industry, and international standards, and are also able to tailor products to meet specific customer requirements.
The company is committed to improving and enhancing its production infrastructure all year round, with a full range of production and processing equipment including vacuum smelting, hot processing, cold processing, and heat treatment. It also has various physical and chemical analysis testing facilities such as spectrometers to ensure product quality. The company has a high-quality R&D, production, and management team that is fully capable of meeting the complex requirements of the current market for material diversification, refinement, and functionalization. Our company is particularly skilled in developing and producing "specialized materials" that are suitable for the market and specific customer needs, which will be one of our company's characteristics. The company adheres to the business philosophy of "guided by market demand, driven by technological progress, and committed to optimizing and innovating materials to create greater value for customers", serving society and the market.