Harsh Steel Stocks, Manufacturers and Exports Inconel alloy 600,601, 625 and X750 capillary pipes and tubes along with Inconel alloy 600,601, 625 and X750 seamless and welded pipes, Inconel alloy 600,601, 625 and X750 heat exchanger tubes, Inconel alloy 600,601, 625 and X750 finned pipes and tubes, Inconel alloy 600,601, 625 and X750 U tubes in standards of ASTM B161 - ASME SB161, ASTM B165 - ASME SB165, ASTM B167 - ASME SB167, ASTM B407 - ASME SB407, ASTM B423 - ASME SB423, ASTM B622 - ASME SB622, ASTM B725 - ASME SB725, ASTM A165 -ASME SB165, ASTM B619 - ASME SB619 as per ASME B36.10 & ASME B36.19.