Establishment of Standards and Changes in Steel Materials in the Spring Industry during the Showa Period
[Reissue Private Spring Preparatory School Lecture 10] About the spring industry during the Showa period! Establishment of various standards and specifications, from JES to JIS.
Last time, we studied the automotive and aircraft industries that form the background of the spring industry during the Showa period. Continuing from that, this time we will have a lesson on the spring industry during the Showa period. One characteristic of the Showa period that must be addressed is the establishment of various standards and specifications. The establishment of such standards can be seen as evidence of the advancement of research into industrial products. For example, regarding the Japanese National Railways, specifications for carbon steel materials for vehicle springs, wire springs for cushions, and wire and plates of phosphor bronze for springs were established in 1928. In 1930, specifications for hard-drawn steel wire for springs were established, followed by specifications for leaf springs and steel wire springs in the following year. *For detailed content of the article, you can view it in the PDF. For more information, please feel free to contact us.
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*You can view the detailed content of the article in the PDF. For more information, please feel free to contact us.*
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*You can view the detailed content of the article in the PDF. For more information, please feel free to contact us.*
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