Alloy 825 Nickel Alloy

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Description

Alloy 825 (NiCr21Mo) is a titanium-stabilised nickel-chromium-iron-molybdenum-copper alloy designed for use in extremely corrosive environments. It has a very high resistance to oxidation and outstanding resistance to stress corrosion cracking in chloride conditions. It achieves good mechanical properties from cryogenic to medium-high temperatures (540ºC) and can be significantly strengthened through cold working. It is resistant to pitting corrosion in sulphuric and phosphoric acids and resists attack in strongly oxidising media such as nitrates, nitric acid and oxidising salts. It also resists most organic acids and alkali solutions. The alloy is reasonably ductile and can be worked in a similar way to austenitic stainless steels.

Related Standards

BS 3076

Equivalent Materials

This material data has been provided by Matmatch.

"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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Applications

Chemical Industry

Equipment For Chemical Industry

Heat Exchangers

Energy

Power Stations

Power Station Parts

Nuclear Energy

Nuclear Plants

Automotive

Commercial Vehicles

Trucks & Trailers

Maritime

Ship Building & Marine Structures

Marine Engines & Propulsion

Equipment For The Chemical Industry In General

Other Equipment For The Chemical Industry

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Properties

Mechanical

Property	Temperature	Value
Elongation	23.0 °C	30 % Show Material materials with Elongation of 30 %
Tensile strength	23.0 °C	590 MPa Show Material materials with Tensile strength of 590 MPa
Yield strength Rp0.2	23.0 °C	220 MPa Show Material materials with Yield strength Rp0.2 of 220 MPa

Chemical properties

Property	Value
Chromium	21.5 % Show Material materials with Chromium of 21.5 %
Copper	2.2 % Show Material materials with Copper of 2.2 %
Iron	30 % Show Material materials with Iron of 30 %
Molybdenum	3 % Show Material materials with Molybdenum of 3 %
Nickel	42 % Show Material materials with Nickel of 42 %

Technological properties

Property
Application areas	Chemical processing: Phosphoric acid evaporators, pickling-tank heaters, pickling hooks and equipment, and chemical process equipment;Power generation: Components for spent nuclear fuel element recovery;Other: Tank trucks and propeller shafts
Corrosion properties	Excellent corrosion resistance
General machinability	It is readily machinable

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