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API 5L X52 · API 5L X70 · API 5L X65 · Welded & Seamless PipeAPI 5L X52 · API 5L X65User rating: 5/5Authors: Santosh Kumar · S K Shukla · Sourav De · Atul Saxena · B K Jha · Biplab MishraAbout: Microstructure · Precipitation