| 摘要 |
A seamless can body configured so that, even if the wall thickness of the can body is small, the flatness of a center panel of a bottom of the can body can be stably maintained and the can body has high pressure resistance, high formability, and excellent properties for an internal pressure test. The seamless can body have a can bottom shape provide with: a rim portion protruding to an outside of the can; an annular concave portion adjacent to an inner side of the rim portion and protruding to an inside of the can; and a flat center panel extending continuously from an inner peripheral side of the annular concave portion with a corner portion interposed therebetween. The curvature radius (R 3 ) of the corner section is in the range of 1.5 mm < R 3 ‰¤ 6. 0 mm, the depth of the annular concave section is from 1.5mm to less than 3.0 mm, and the flatness (BSD) of the center panel is from -0.15 to 0.15mm. |
