Incoloy 825 is highly resistant to corrosion. It has a high nickel content, sufficient to resist chloride ion stress corrosion cracking, and a very stable austenite structure. The levels of molybdenum and copper enable the alloy to resist reducing agents and acids. Chromium gives resistance to oxidising conditions, such as nitric acid solutions, nitrates and oxidising salts. The alloy is titanium stabilised to resist pitting and intergranular attack after fabrication, particularly welding, which includes heating in the critical sensitisation temperature range (650°C – 760°C).
Alloy 825 offers exceptional resistance to corrosion by sulphuric and phosphoric acids and is often the most cost effective alloy in sulphuric acid service. waspaloy alloy 1
Austral Wright Metals can supply this alloy as plate, sheet, strip, bar, rod, wire, tube, pipe, fittings, fasteners.
Incoloy 825 is approved for pressure vessel operating temperatures up to 525°C (AS1210, AS4041), 538°C (ASME Boiler & Pressure Vessel Code, Sections I, III, VIII, IX, Cases 1936, N-188). Brittle phases may form in alloy 825 at temperatures above ~ 540°C, so it is not normally used at these temperatures, where creep-rupture properties would be design factors.
Typical Applications of Incoloy Alloy 825 include:
Table 1. Chemical composition of Incoloy Alloy 825 (ASTM B163 – Heat exchanger tube)
Table 2. Typical room temperature tensile properties (not for design. Consult the relevant material or product specification for design values)
Figure 1. High temperature tensile properties of annealed Incoloy 825 bar.
The outstanding property of Incoloy 825 is its corrosion resistance. In reducing & oxidising conditions, Incoloy 825 resists general corrosion, pitting & crevice corrosion, intergranular corrosion and stress corrosion cracking. It is particularly useful in sulphuric & phosphoric acids, sulphur containing flue gases, sour gas and oil wells and sea water.
Figure 2. Isocorrosion chart in laboratory pure sulphuric acid.
Incoloy 825 can be readily hot or cold worked. Hot working should be in the range 870 – 1180°C, finishing at 870 – 980°C. For maximum corrosion resistance hot worked parts should be stabilise annealed before use. The alloy is easier to cold form than stainless steels.
Incoloy 825 is classed as a ‘C’ alloy, and is reasonably easy to machine.
The alloy is readily weldable by the normal processes (GMAW (MIG), GTAW (TIG), SMAW (manual), SAW). The joint must be clean to avoid contamination of the weld pool.
Table 5. A guide to welding consumables to be used with Incoloy Alloy 825 under various conditions.
Incoloy 825 is stabilise annealed at 940°C. The softest structure is obtained at 980°C. Sections heavier than sheet, strip and wire should be quenched to avoid sensitisation.
Please consult Austral Wright Metals for specific advice on your application.
Table 6. ASM specifications for Incoloy Alloy 825.
Seamless Nickel and Nickel Alloy Condenser and Heat-Exchanger Tubes
Nickel-Iron-Chromium-Molybdenum-Copper Alloy (UNS N08825 and N08221)* Seamless Pipe and Tube
Ni-Fe-Cr-Mo-Cu Alloy (UNS N08825 and UNS N08221)* Plate, Sheet, and Strip
Welded UNS N06625 and UNS N08825 Alloy Tubes
Nickel-Alloy (UNS N06625 and N08825) Welded Pipe
General Requirements for Nickel and Nickel Alloy Welded Tube
Table 7. Other international grades that are equivalent to Incoloy Alloy 825.
This information has been sourced, reviewed and adapted from materials provided by Austral Wright Metals - Ferrous, Non-Ferrous and High Performance Alloys .
For more information on this source, please visit Austral Wright Metals - Ferrous, Non-Ferrous and High Performance Alloys .
Please use one of the following formats to cite this article in your essay, paper or report:
Austral Wright Metals - Ferrous, Non-Ferrous and High Performance Alloys. (2020, June 10). Incoloy 825 – Properties, Applications, Fabrication, Machinability and Weldability of Incoloy 825. AZoM. Retrieved on April 25, 2024 from https://www.azom.com/article.aspx?ArticleID=4245.
Austral Wright Metals - Ferrous, Non-Ferrous and High Performance Alloys. "Incoloy 825 – Properties, Applications, Fabrication, Machinability and Weldability of Incoloy 825". AZoM. 25 April 2024. <https://www.azom.com/article.aspx?ArticleID=4245>.
Austral Wright Metals - Ferrous, Non-Ferrous and High Performance Alloys. "Incoloy 825 – Properties, Applications, Fabrication, Machinability and Weldability of Incoloy 825". AZoM. https://www.azom.com/article.aspx?ArticleID=4245. (accessed April 25, 2024).
Austral Wright Metals - Ferrous, Non-Ferrous and High Performance Alloys. 2020. Incoloy 825 – Properties, Applications, Fabrication, Machinability and Weldability of Incoloy 825. AZoM, viewed 25 April 2024, https://www.azom.com/article.aspx?ArticleID=4245.
Very useful data and information. Thanks...
Very useful information. Thank you.
Best Metal Reference Site for Alloy Steels
The opinions expressed here are the views of the writer and do not necessarily reflect the views and opinions of AZoM.com.
Do you have a review, update or anything you would like to add to this article?
In this interview, we speak with Dr. Alice Merryweather, Founder and Lead Scientist at illumion, about charge photometry and how the technique can be used for battery screening and development.
In this interview, Durr NDT goes over the main differences between CR and DDA.
Jessica Evans and Patrick Deneny
In an interview ahead of ChemUK 2024, AZoM talked with Jessica Evans, Industry Member Experience Lead, and Patrick Deneny, Industry Member Engagement Executive, from the Royal Society of Chemistry (RSC), about their role in advancing the chemical sciences.
Introducing ATS' lab furnaces and high temperature accessories - ATS Series 3110/3210.
Revontium™ is a compact XRF spectrometer that delivers high-quality elemental analysis in a compact,tabletop format.
This product enables precise monitoring of UV-cured resins, measuring dielectric/conductive properties within a thin resin layer. The Quick-Connect Fixture, offers accurate UV exposure parameter measurement with a suspended thermocouple.
The global semiconductor market has entered an exciting period. Demand for chip technology is both driving the industry as well as hindering it, with current chip shortages predicted to last for some time. Current trends will likely shape the future of the industry, which is set to continue to show
The primary distinction between graphene-based batteries and solid-state batteries lies in the composition of either electrode. Although the cathode is commonly changed, carbon allotropes can also be employed in fabricating anodes.
In recent years, the IoT is rapidly being introduced into almost all sectors, but it has particular importance in the EV industry.
Your AI Powered Scientific Assistant
Hi, I'm Azthena, you can trust me to find commercial scientific answers from AZoNetwork.com.
A few things you need to know before we start. Please read and accept to continue.
Azthena may occasionally provide inaccurate responses. Read the full terms.
While we only use edited and approved content for Azthena answers, it may on occasions provide incorrect responses. Please confirm any data provided with the related suppliers or authors. We do not provide medical advice, if you search for medical information you must always consult a medical professional before acting on any information provided.
Your questions, but not your email details will be shared with OpenAI and retained for 30 days in accordance with their privacy principles.
Please do not ask questions that use sensitive or confidential information.
Read the full Terms & Conditions.
AZoM.com - An AZoNetwork Site
nitronic 60 1 Owned and operated by AZoNetwork, © 2000-2024