Pressure vessel for hydrogen and method for manufacturing same

Abstract

The present invention provides a pressure vessel for hydrogen in which the development of cracking in the pressure vessel for hydrogen can be effectively inhibited and that is excellent in terms of safety, reliability, and durability. The present invention pertains to a pressure vessel for hydrogen in which a plastic region is present on the inner face side of a hydrogen pressure vessel main body, an elastic region is present on the outer face side, and compressive residual stress is generated on the inner face, wherein preferably: the equivalent plastic strain remaining on the inner surface of the hydrogen pressure vessel main body is 1% or below; the plastic region on the inner face side measures 50% or less of the wall thickness in the radial direction of the hydrogen pressure vessel main body; and the steel used has a tensile strength of at least 725 MPa.

Dependencies are inferred from the claim text.