| abstract |
Provided is an aluminum alloy plate which does not cause abnormal growth of crystal grains and has less cavitation in high temperature blow molding. An Al alloy plate comprising Mg 4 to 5%, Mn 0.35 to 0.5%, Cr 0.001 to 0.05%, Si + Fe 0.6% or less, Cu 0.15% or less, and the balance being substantially Al. In particular, the elongation of a high-temperature tensile test at a strain rate of 10 −2 / s or more at 400 to 550 ° C. is 150% or more, and the cavitation area ratio at 100% tensile deformation is 2% or less, and abnormally grown grains of 100 μm or more. What does not exist. Also, the cavitation area ratio during blow molding with a sheet thickness reduction rate of 65% or less at 400 to 550 ° C. is 2% or less, and there are no abnormally grown grains of 100 μm or more. [Selection] Figure 1 |