ALUMINUM ALLOY MATERIAL FOR STORAGE CONTAINER FOR HIGH-PRESSURE HYDROGEN GAS

摘要

Provided is a 6000-series aluminum alloy material for high-pressure gas containers which has resistance to hydrogen embrittlement, mechanical properties, etc. The aluminum alloy material for high-pressure gas containers has Fe, Mn, and Cu contents which are within respective ranges narrower than in a standard composition of AA6066 alloy. This aluminum alloy material is produced so as to have a structure which contains a certain amount of fine dispersed grains and contains a small amount of coarse crystallized particles. Thus, strength and resistance to hydrogen embrittlement, which are required of high-pressure gas containers, are improved.