| 摘要 |
PROBLEM TO BE SOLVED: To provide a plate material that inhibits decline in strength at a time of welding to a connecting member.SOLUTION: A side plate 11 includes: a plurality of side plate pieces 16 to 19 that are arranged linearly along an axial direction D1, each of which having been welded to an adjacent one; and edge plate pieces 20, 21 fixed on all of the side plate pieces 16 to 19 and constitute an edge part of the side plate 11. At least one of the side plate pieces 16 to 19 is provided with at least one peening processing part R1 on a side plate piece side, along welded parts between the side plate pieces 16 to 19. The edge plate pieces 20, 21 have a size large enough to install the peening processing part R1 on the side plate piece side, in an area on the side plate 11 where a temperature remains 400°C or less when welding the edge plate pieces 20, 21 with connecting members 12, 13. |
