Harsh Steel Stocks, Manufacturers and Exports Nickel alloy 200, 201 and 205 capillary pipes and tubes along with Nickel alloy 200,201 and 205 seamless and welded pipes, Nickel alloy 200,201 and 205 heat exchanger tubes, Nickel alloy 200,201 and 205 finned pipes and tubes, Nickel alloy 200,201 and 205 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.