Abstract
This paper presents FRP cylinder for storing high pressure hydrogen gas with Cr-Mo steel liner and Carbon Fiber FRP. Specifically, it relates to an FRP cylinder using a thin Cr-Mo steel liner of thickness 3. 2mm which shows light-weightness same as Al liner FRP. This steel named 34CrMo44 is modified 34CrMo4: No. 17220, specified in EN-10083-3 (2006) and it contains 0. 3 to 0. 6% Mo and not contains intentionally adding Ni.
The 34CrMo44 steel shows good resistance to hydrogen embrittlement, especially excellent fatigue crack growth characteristic under high pressure hydrogen gas conditions. Thereby, 34CrMo44 liner FRP has suitability for a high pressure hydrogen accumulator cylinder in station or on-board tank for fuel cell vehicle.
