クレーンの構造部分に使用される材料の現状

抄録

The structural standards that are the basis for the design and manufacture of cranes specify the materials that can be used for structural parts. The material must be a steel material that conforms to JIS, or a steel material of equal or higher quality. The newly applied material can be used if it is approved, and Japan Crane Association is involved in deciding on the adoption of the material. As a recent trend, the number of inquiries about overseas standard materials, thin high-strength steel, and aluminum materials used in imported cranes is increasing. In some cases, a clear view cannot be given due to the lack of standards that show the basis of judgment and the difference between JIS and overseas standards (eg, test method, chemical composition, etc.). In this paper, regarding the materials used for the structural parts such in cranes, we will show the related standards and problems in judging the acceptance, and introduce the efforts of Japan Crane Association.