Products tagged with 'high strength austenitic stainless steels'
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Product Number:
51324-20780-SG
Author:
Clara Herrera; Merlin Seifert
Publication Date:
2024
$40.00
Hydrogen can be the future energy carrier as it might offer a substitute for fossil fuels. However, it can degrade the mechanical properties of many materials, a phenomenon well known as hydrogen embrittlement (HE) that can lead to a catastrophic failure. Austenitic stainless steels (ASS), especially UNS S31603 with a minimum yield strength (YS) of 170 MPa (25 ksi), is frequently used for hydrogen applications due to its low susceptibility to HE compared with other ASSs. However, ASS cannot be used when high strength (YS > 500 MPa) is required. Nitrogen-strengthened (e.g. UNS S20910) and CrMn(NiMo)N austenitic stainless steels in strain-hardened condition show a YS higher than 758 MPa (110 ksi) and are resistant to HE when tested in 100 bar (10 MPa) H2 atmosphere at room temperature. This paper discusses the susceptibility of high strength austenitic stainless steels, UNS S20910 and CrMnNiMoN (18Cr-18Mn-4Ni-2Mo), in strain hardened-condition to HE at higher H2 pressure. Slow strain rate tensile tests (SSRT) were carried out in hydrogen atmosphere at 1000 bar (100 MPa) and room temperature. Both austenitic stainless steels exhibit YS > 758 MPa (110 ksi) and UTS > 900 MPa (130 ksi). UNS S20910 and CrMnNiMoN austenitic stainless steels are resistant to HE, showing a ductile fracture. Although CrMnNiMoN present a reduction in ductility, its relative reduction of aera is higher than 80 %. Their fracture mode is ductile, characterized by microvoids and dimples. UNS S20910 and CrMnNiMoN can be an option for high-pressure hydrogen applications when high strength is required.
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Product Number:
51323-19269-SG
Author:
Clara Herrera, Philipp Niederhofer, Merlin Seifert
Publication Date:
2023
$20.00
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