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| Investigation of sulfide stress corrosion cracking for X70 pipeline steel |
| 中钢炉料公司 |
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Abstract Using the NACE standard bent-beam test, sulfide stress corrosion cracking (SSCC) of different types microstructure in X70 grade pipeline steel with different types of microstructure was investigated. The X70 pipeline steel are all obtained from Ansteel, The result showed that the X70 pipeline steel had the excellent performance to the SSCC and the microstructure dominated by fine and homogeneous acicular ferrite had the excellent resistance to SSCC. Both the high density tangled dislocation and carbonitride precipitiated along with dislocation networks are the main reasons for the steel with acicular ferrite to have excellent resistance to SSCC. The microstructure is the main factor to decide the SSCC performance.
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Received: 12 September 2006
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