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97019 MARTENSITIC STAINLESS STEEL SEAMLESS LINEPIPE WITH SUPERIOR WELDABILITY AND CO2 CORROSION RESISTANCE

Product Number: 51300-97019-SG
ISBN: 97019 1997 CP
Author: Y. Miyata, M. Kimura, T. Koseki, T. Toyooka, F. Murase
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Two types of new martensitic stainless steel with good weldability and superior corrosion resistance have been developed for line pipe application. Both steels are suitable for welding without preheating owing to lowering C and N contents, and they show good low temperature toughness in welds without PWHT. One is applied to sweet environments. It gives better resistance to CO2 corrosion than the 13Cr martensitic stainless steel for OCTG. Lowering C and addition of Ni contribute to reduction of general corrosion rate in the CO2 environment. The addition of Cu improves the pitting resistance. The other is applied to light sour environments. It gives good SSC resistance in welds owing to the improvement of the pitting resistance due to Mo addition. The seamless pipes of these martensitic stainless steels are applicable as substitutes for a part of duplex stainless steel flow lines. Keywords: martensitic stainless steel, seamless pipe, line pipe, flow line, weldability, carbon dioxide corrosion, pitting, sulfide stress cracking, low temperature toughness
Two types of new martensitic stainless steel with good weldability and superior corrosion resistance have been developed for line pipe application. Both steels are suitable for welding without preheating owing to lowering C and N contents, and they show good low temperature toughness in welds without PWHT. One is applied to sweet environments. It gives better resistance to CO2 corrosion than the 13Cr martensitic stainless steel for OCTG. Lowering C and addition of Ni contribute to reduction of general corrosion rate in the CO2 environment. The addition of Cu improves the pitting resistance. The other is applied to light sour environments. It gives good SSC resistance in welds owing to the improvement of the pitting resistance due to Mo addition. The seamless pipes of these martensitic stainless steels are applicable as substitutes for a part of duplex stainless steel flow lines. Keywords: martensitic stainless steel, seamless pipe, line pipe, flow line, weldability, carbon dioxide corrosion, pitting, sulfide stress cracking, low temperature toughness
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