{"id":18368,"date":"2019-12-14T02:17:37","date_gmt":"2019-12-14T02:17:37","guid":{"rendered":"https:\/\/www.meetyoucarbide.com\/?p=13865"},"modified":"2020-05-07T01:11:17","modified_gmt":"2020-05-07T01:11:17","slug":"what-is-low-alloy-structural-steel","status":"publish","type":"post","link":"https:\/\/www.meetyoucarbide.com\/ja\/%e4%bd%8e%e5%90%88%e9%87%91%e6%a7%8b%e9%80%a0%e7%94%a8%e9%8b%bc%e3%81%a8%e3%81%af\/","title":{"rendered":"\u4f4e\u5408\u91d1\u69cb\u9020\u7528\u92fc\u3068\u306f"},"content":{"rendered":"<div class=\"vgblk-rw-wrapper 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.vgblk-rw-wrapper -->","protected":false},"excerpt":{"rendered":"<p>Low alloy structural steel refers to the alloy structural steel with total alloy composition less than 5%. The carbon content of this kind of steel is similar to that of low carbon steel, and it is mainly strengthened by a small amount of alloy elements to improve toughness and weldability. Its strength is much higher than that of the same carbon steel. Widely used in pressure vessels, chemical equipment, boilers, bridges, vehicles, ships and large steel structures. Alloy elements such as manganese, silicon and molybdenum cause solution strengthening. Vanadium and niobium can refine grains and improve toughness. Molybdenum can improve the hardenability, the bainite structure and the thermal strength. 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