公开(公告)号：US4675156A

公开(公告)日：1987-06-23

申请号：US765927

申请日：1985-08-15

申请人： Setsu Sakamoto ,  Yasuhiro Nakagawa ,  Isamu Yamauchi ,  Takashi Zaizen ,  Katsumi Suzuki ,  Susumu Shimamoto ,  Hideo Nakajima

发明人： Setsu Sakamoto ,  Yasuhiro Nakagawa ,  Isamu Yamauchi ,  Takashi Zaizen ,  Katsumi Suzuki ,  Susumu Shimamoto ,  Hideo Nakajima

IPC分类号： C22C38/00 ,  C22C38/58

CPC分类号： C22C38/001 ,  C22C38/58

摘要： Disclosed is a structural austenitic stainless steel with superior proof stress and toughness at cryogenic temperatures. The steel has a composition essentially consisting of, by weight, not greater than 0.05% of carbon, 0.20 to 0.70% of nitrogen, not greater than 1.0% of silicon, not greater than 25% of manganese, 13 to 35% of chromium, 5 to 25% of nickel and the balance substantially iron. The chromium content and manganese content is selected to meet the condition of (Cr+0.9 Mn).gtoreq.20%. The index of cleanliness showing the amount of nonmetallic inclusions is not greater than 0.1%.

摘要翻译： 公开了一种在低温下具有优异的应力和韧性的结构奥氏体不锈钢。 该钢具有以重量计不超过0.05％的碳，0.20至0.70％的氮，不大于1.0％的硅，不超过25％的锰，13至35％的铬， 镍的5至25％，余量基本上为铁。 选择铬含量和锰含量以满足（Cr + 0.9 Mn）≥20％的条件。 清洁度指示非金属夹杂物的量不大于0.1％。