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Fireproof steel for a steel construction and process for manufacturing warm rolled hollow profiles, supports, a shape steel or a plate made thereof
Fireproof steel for a steel construction and process for manufacturing warm rolled hollow profiles, supports, a shape steel or a plate made thereof
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机译:用于钢结构的耐火钢及其制造热轧空心型材,支撑件,型钢或由其制成的板的方法
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摘要
Fire-resistant welding steel in the form of hollow profiles, supports or molded steel contains (in wt.%) 0.06-0.13 C, 0.15-0.50 Si, 1.0-2.0 Mn, maximum 0.025 P, maximum 0.02 S, 0.005-0.040 Al, 0.20-0.40 Mo, 0.40-0.70 W, 0.02-0.05 Nb and a balance of Fe with unavoidable impurities. A component made from the steel has a yield point at elevated temperature of at least 200 MPa at 600 degrees C and a CEIIW value of less than 0.5. ??An Independent claim is also included for a process for the production of hot-rolled hollow profiles having a thickness of up to 30 mm made from the above steel comprising casting the steel into strands, hot rolling into rods and then into hollow profiles at at least 1200 degrees C before cooling in air.
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