Session: CS-02-01 Hydrogen Effects on Material Behavior for Structural Integrity Assessment (Joint with MF-2) - Applying ASME Codes to Material Selection

Paper Number: 106417

106417 - Effect of Hydrogen Partial Pressure on Fatigue Crack Growth Rates of Low Alloy, Quenched and Tempered Steels 

Low alloy, quenched and tempered steels are commonly used for construction of seamless pressure vessels for hydrogen gas storage. Designing such vessels for high-pressure gaseous hydrogen service requires knowledge of fatigue crack growth rates and fracture toughness in the service environment at the design pressure. Measurement of these properties is challenging, and only a few laboratories in the world are equipped to make these measurements at very elevated pressure, i.e. up to 1,000 bar (15,000 psi). In recent years, these properties for common low alloy steels were published in the ASME Boiler and Pressure Vessels Code Case (CC) 2938, therefore allowing design and construction without the need for dedicated testing. However, the fatigue crack growth curves published in the CC were determined from test data at 100 MPa and may be over-conservative for lower pressure applications. Prior publication PVP2019-93907 in fact already proposed a correction factor of fatigue crack growth rates based on hydrogen fugacity. Since then, new data were generated at lower pressures (550 bar or 8,000 psi). This paper presents the new findings and discusses the applicability of the previously proposed equation, which could allow reducing conservatism in current design of pressure vessels.

Sandia National Laboratories is a multimission laboratory managed and operated by National Technology and Engineering Solutions of Sandia, LLC., a wholly owned subsidiary of Honeywell International, Inc., for the U.S. Department of Energy’s National Nuclear Security Administration under contract DE-NA-0003525.

Presenting Author: Paolo Bortot Tenaris

Presenting Author Biography: P. has been involved with steel and pressure vessels design for hydrogen and embrittling gas transport and storage since 2007. He is a member of several international working groups in the field of hydrogen material compatibility and high pressure vessels design. Currently he is a design engineer within the industrial technology department at Tenaris.
P. is member of the ASME Boiler and Pressure Vessels Code B31.12, ISO TC58/WG7 and ISO TC197/WG15.

Authors:

Paolo Bortot Tenaris
Matteo Ortolani Tenaris
Christopher San Marchi Sandia National Laboratories
Joseph Ronevich Sandia National Laboratories