Alloy 825

Alternative and trade names
Alloy 825

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Description

Alloy 825 is an austenitic nickel-iron-chromium alloy with additions of copper, molybdenum, and titanium-stabilised to resist pitting and intergranular attack. Molybdenum and copper enable Alloy 825 to resist reducing agents and acids, while chromium gives Alloy 825 resistance to oxidising conditions. Mechanical properties are stable up to approximately 550°C. It can be supplied in hot worked annealed and cold drawn conditions.

Related Standards

Equivalent Materials

This material data has been provided by Broder Metals Group.

"Typical" values were obtained via a literature search. "Predicted" values were imputed via artificial intelligence technology. While we have placed significant efforts in ensuring data accuracy, "typical" and "predicted" data should be considered indicative and verified by appropriate material testing. Please do contact us if additional information on the the predicted data method is required.
All metrics apply to room temperature unless otherwise stated. SI units used unless otherwise stated.
Equivalent standards are similar to one or more standards provided by the supplier. Some equivalent standards may be stricter whereas others may be outside the bounds of the original standard.

Ashby charts

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Properties

Mechanical

Property	Temperature	Value
Elongation	23.0 °C	30 % Show Supplier Material materials with Elongation of 30 %
Tensile strength	23.0 °C	586 MPa Show Supplier Material materials with Tensile strength of 586 MPa
Yield strength Rp0.2	23.0 °C	241 MPa Show Supplier Material materials with Yield strength Rp0.2 of 241 MPa

Chemical properties

Property	Value
Aluminium	0.2 % Show Supplier Material materials with Aluminium of 0.2 %
Carbon	0.05 % Show Supplier Material materials with Carbon of 0.05 %
Chromium	19.5 - 23.5 % Show Supplier Material materials with Chromium of 19.5 - 23.5 %
Copper	1.5 - 3 % Show Supplier Material materials with Copper of 1.5 - 3 %
Iron	22 % Show Supplier Material materials with Iron of 22 %
Manganese	1 % Show Supplier Material materials with Manganese of 1 %
Molybdenum	2.5 - 3.5 % Show Supplier Material materials with Molybdenum of 2.5 - 3.5 %
Nickel	38 - 46 % Show Supplier Material materials with Nickel of 38 - 46 %
Silicon	0.5 % Show Supplier Material materials with Silicon of 0.5 %
Sulfur	0.03 % Show Supplier Material materials with Sulfur of 0.03 %
Titanium	0.6 - 1.2 % Show Supplier Material materials with Titanium of 0.6 - 1.2 %

Technological properties

Property
Application areas	Alloy 825 ideally suitable for use in heating coils, tanks, baskets and chains in sulphuric acid pickling plants, heat exchangers in phosphoric and other acid and chemical production applications. Other applications include sea-water-cooled heat exchangers, offshore product piping systems, for components in sour gas service in pollution- control equipment, and oil and gas well piping and in nuclear fuel reprocessing components.
Corrosion properties	Alloy 825 is therefore highly suitable where required properties include good resistance to stress-corrosion cracking, pitting, and crevice corrosion. Alloy 825 is also often used where oxidising and non-oxidising hot acids (especially sulphuric, phosphoric, nitric and organic acids, as well as alkalis such as sodium or potassium hydroxide) come into contact with the metal.