A type of bar. Refers to rails and their accessories (fish plates, tie plates, bolts, nuts, etc.). The material must be wear-resistant, fatigue-resistant, corrosion-resistant, and weldable, and is usually made of high carbon steel (rail carbon steel). High manganese steel is used for parts that are particularly susceptible to impacts, such as point rails. Rails that weigh 30 kg or more per meter are called ordinary rails, and those that weigh less than 30 kg are called light rails. There are also heat-treated rails, conductive rails, and special rails for cranes and elevator guides. Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information |
条鋼の一種。レールとその付属品 (継ぎ目板,タイ・プレート,ボルト,ナットなど) をさす。材質は耐摩耗性,耐疲労損傷性,耐食性,溶接性などが要求され,普通,高炭素鋼 (軌条用炭素鋼) が用いられる。特にポイントレールなど衝撃を受ける部分には高マンガン鋼などが利用される。 1mあたり 30kg以上のものを普通レール,30kg未満のものを軽レールといい,そのほか,熱処理レール,導電レールや,クレーン用,エレベーター・ガイドなどの特殊レールがある。
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