Microstructure and mechanical properties of STFA26 tube before and after service at high temperature

The base and weld metals of old STFA26 (Cr9Mo) seamless alloy steel tubes, which were put into service at 570°C for 16 000 h, are investigated experimentally. The mechanical properties of the base and weld metals of old and new tubes are also examined. The results show that the properties of the STF...

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Bibliographic Details
Published in:The International journal of pressure vessels and piping 1999-04, Vol.76 (4), p.209-213
Main Authors: Fang, Deming, Gao, Zhenliang, Zhang, Kangda
Format: Article
Language:English
Subjects:
Applied sciences
Exact sciences and technology
Fractures
Furnace
Furnaces
High temperature properties
Mechanical engineering. Machine design
Mechanical properties
Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology
Metallographic microstructure
Metals. Metallurgy
Microhardness
Microstructure
Steel design
Steel tanks and pressure vessels
boiler manufacturing
STFA26 tube
Welds
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Summary:The base and weld metals of old STFA26 (Cr9Mo) seamless alloy steel tubes, which were put into service at 570°C for 16 000 h, are investigated experimentally. The mechanical properties of the base and weld metals of old and new tubes are also examined. The results show that the properties of the STFA26 alloy tubes scarcely have deterioration in long service at 570°C and the tubes can be used in the furnace in the following service.
ISSN:0308-0161
1879-3541
DOI:10.1016/S0308-0161(98)00141-0