牌号 | Aperam AISI 347/347H |
厂家 | Aperam |
分类 | Steel |
介绍 | Grade 347 from Aperam South America is a stainless steel elaborated to meet the international standards AISI 347 and AISI 347H. Due to the stabilization with niobium, this grade has the corrosion resistance at high temperatures as its main characteristic. When submitted to temperatures ranging from 450-900°C, some grades tend to form chromium carbide precipitate in the grain boundary region, and the material becomes susceptible to intergranular corrosion. The stabilization with niobium inhibits the formation of chromium carbide, and consequently increases the resistance to this type of corrosion. Grade AISI 347 has excellent weldability, a characteristic common to austenitic steels, as well as high mechanical properties, which guarantees good ductability, and it s recommended for some cold forming processes. The application of grade AISI 347 is mainly intended for corrosive environments and high temperatures. It is currently being used in the manufacture of collector rings for aircrafts, engine components for rockets, exhaust manifold for cars, expansion joints and equipment for chemical processing at high temperatures. |
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