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Castle Metals stocks a wide range of alloy 825 in sheet and plate, from 1.5mm – 50mm thick. With added value processing including water jet, laser, plasma and hi definition plasma, Castle Metals can profile to exact size and shape to specific customer requirements. All material is certified to the highest industry standards, making Castle the perfect partner for demanding supply chain conditions.
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The higher conditional stress values of up to 90% of the yield strength at temperature may be used for applications in which slightly greater deformation is acceptable. These stresses may result in dimensional changes due to permanent strain and are not recommended for ﬂanges of gasketed joints.
Alloy 825 has a stable face-centred cubic structure. The chemical composition and optimised annealing treatment ensure that corrosion resistance is not impaired by sensitisation.
Alloy 825 is a versatile general engineering alloy with resistance to corrosion in acids and alkalis under both oxidising and reducing conditions.
High nickel content gives the alloy virtual immunity to stress corrosion cracking.
Corrosion resistance is good in media as diverse as sulphuric, sulphurous, phosphoric, nitric and organic acids, alkalis such as sodium or potassium hydroxide, and aqueous chloride solutions.
The versatility of alloy 825 is illustrated by its use in nuclear fuel element dissolvers where a variety of corrosive media, e.g. sulphuric and nitric acids and sodium hydroxide, are handled in the same equipment.
The following properties are applicable to alloy 825 in the soft-annealed (stabilising annealed) condition and indicated size ranges.
Speciﬁed properties of material outside these size ranges are subject to special enquiry.
Minimum mechanical properties at room temperature (ASTM) Please Note: The ﬁgures quoted are intended for guidance only. For further information, please refer to the standards listed or contact our sales or QA department.
Alloy 825 is used in a wide variety of applications up to a temperature of approximately 550°C (1020°F)
Typical applications include