Abstract

VDM 825 (Nicrofer 4221) is a titanium-stabilized fully austenitic Ni-Fe-Cr-Mo-Cu alloy that is designed for use in extremely corrosive environments. It is approved for pressure vessels with wall temperatures up to 450 °C (842 °F) according to VdTÜV and 538 °C (1000 °F) for Section VIII Division 1 vessels according to ASME. This datasheet provides information on composition, physical properties, elasticity, and tensile properties. It also includes information on low and high temperature performance, corrosion resistance as well as heat treating, machining, and joining. Filing Code: Ni-764. Producer or source: VDM Metals GmbH.

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