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成果報告書詳細
管理番号20170000000129
タイトル*平成28年度中間年報 水素利用技術研究開発事業 燃料電池自動車及び水素供給インフラの国内規制適正化、国際基準調和・国際標準化に関する研究開発 水素ステーション用金属材料の鋼種拡大に関する研究開発
公開日2017/6/2
報告書年度2016 - 2016
委託先名一般財団法人石油エネルギー技術センター 高圧ガス保安協会 国立大学法人九州大学
プロジェクト番号P13002
部署名新エネルギー部
和文要約
英文要約Title: Hydrogen Utilization Technology Development/ Research and Development on Improvement of Domestic Regulations, International Standardization and Harmonization for Fuel Cell Vehicles and Hydrogen Infrastructure/ Research and Development on the Expansion of Utilizable Steel Grades for Hydrogen Refueling Station (FY2013-FY2017) FY 2016 Annual Report

1. Research and development toward the utilization of lower-cost and/or higher-strength materials
1) Planning and preparation (JPEC)
To clarify the operating pressure and temperature of equipment used in hydrogen fueling station, needs and opinions from industries were surveyed.
- Revise the needs from industries on enhancing the usage of metal materials used in hydrogen refueling stations.
2) Evaluation tests and reviewing the results (KHK, Kyushu Univ., JPEC)
The project intended to expand the type and grade of materials which are eligible to be used for high-pressure hydrogen gas atmosphere in hydrogen refueling station and peripheral systems. This year, the followings were achieved:
- A series of experimental data (e.g., slow strain rate tensile property, fatigue life property, fatigue crack growth property and hydrogen diffusivity) was acquired on the low alloy steel JIS-SNCM439 in high-pressure hydrogen gas environment. In addition, fatigue limit properties in high-pressure hydrogen gas were studied on austenitic stainless steels and low alloy steels by using a resonant bending fatigue testing machine.
- Based on a series of experimental data, a new guideline for material selection and design was proposed for JIS-SNCM439.
- Basic studies were carried out on the mechanism of hydrogen-induced degradation, e.g. crack acceleration in slow strain rate tensile test and fracture-toughness test, in austenitic stainless steels and low alloy steels.
- To survey the opportunity of using metal materials which show few or some hydrogen embrittlement in hydrogen refueling station, evaluating methods and evaluating indexes were discussed.
- For the commercially available SUS316L, the possibility of use in hydrogen was investigated.
- Continue the technical survey and discussion how to use low alloy carbon steels (Cr-Mo steels). Preparation of technical document was started.
3) Proposal for the revision of Technical Standard (KHK, JPEC)
- SUH660 high alloy steel used under a condition, from -45C to 120C and equal or less than 82MPa was included in regulation, in Nov. 2016.

2. Development of database for the utilization of materials in higher pressure hydrogen over a wider range of temperature
1) Planning and preparation (JPEC)
See 1. 1)
2) Evaluation tests and reviewing the results (KHK, Kyushu Univ., JPEC)
Research and evaluation plan of metal materials used in ultra-high pressurized hydrogen at wide temperature range was discussed and Joint meeting was organized to co-operate with other research works in NEDO program.
- Make a consensus of requirements from industries on welding joint that used in in hydrogen refueling stations. As a result, XM-19 (HRX-19) was candidate as an appropriate material and will be evaluate.
3) Proposal for the revision of Technical Standard (KHK, JPEC)
- Allowable tensile stress of SUH660, nominated in ASME standard, was included in regulation in Nov. 2016.
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