Incoloy 825 Plates: Solid-Solution Alloy and Marine and Chemical Service

Product Overview

Incoloy 825 Plates are wrought, nickel-iron-chromium-molybdenum-copper-titanium alloys designed to withstand continuous exposures up to 816 °C (1500 °F) and intermittent 982 °C (1800 °F) while resisting oxidation, carburization, and chloride stress-corrosion cracking. Their solid-solution strengthening—driven by 2.5–3.5 % molybdenum and 1.5–3 % copper—avoids precipitation aging and stabilizes mechanical properties from cryogenic service to high temperatures, delivering tensile strengths ≥ 760 MPa and elongations ≥ 30 % in the annealed condition. Chromium levels of 19.5–23.5 % and titanium additions form protective chromia and alumina scales, conferring resistance to nitric, sulfuric, and phosphoric acids, as well as to oxidative salt atmospheres . These plates are specified in ASTM B424/B424M for plate and sheet; AMS 5599; and meet ISO 15156-3/NACE MR0175 sour-service requirements, making them indispensable for acid production, oil & gas well piping, and nuclear fuel reprocessing equipment. Exceptional formability and weldability (TIG/GTAW, electron-beam) support complex panel fabrication, reducing assembly time and maximizing reliability across South Asia, Southeast Asia, the Middle East, Europe, and the Americas.

Chemical Composition

Mechanical Properties

Physical Properties

Conformance Standards

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

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

• AMS 5599 – Special-quality strip/sheet

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

Applications

• Chemical Processing: Heat-exchanger panels, reactor liners, pollution-control scrubbers

• Oil & Gas: Well-piping panels, acid-production vessels, corrosion-resistant cladding

• Marine & Offshore: Seawater condenser panels, subsea manifold liners

• Power Generation: Gas-turbine ducting, combustion-chamber panels

• Nuclear: Fuel-reprocessing equipment, radioactive-waste handling trays

Frequently Asked Questions

Q1: Why choose Incoloy 825 Plates for corrosive environments?
A1: High molybdenum and copper enhance resistance to reducing acids (sulfuric, phosphoric), while chromium and nickel protect against oxidizing media and chloride stress-corrosion cracking.

Q2: Can Incoloy 825 Plates be welded without sensitization?
A2: Yes—titanium additions stabilize against intergranular attack, and TIG/GTAW or EB welding followed by minimal heat treatment preserves alloy integrity.

Q3: What is the maximum service temperature?
A3: Continuous service up to 816 °C (1500 °F), intermittent to 982 °C (1800 °F), with stable mechanical and corrosion performance across this range.

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.