ARK STEEL TUBE owns three mills mainly produce seamless carbon steel tubes, alloy seamless steel tubes, seamless&welded stainless steel tubes, as well as nickel alloy tubes. Product Standard Material Seamless Nickel&Nickel Alloy Tube ASTM B163, B407, B444, B622, B677, etc. UNS N02200, N02201, N04400, N06600, N06601, N06690, N06025, N06603, N06686, N08120, N08800, N08810, N08811, N08801, N08825. Seamless&Welded Stainless Steel Tube ASTM A213, A249, A268, A269, A312, A789, etc. 304/L, 316/L, 314, 321, 347H, 316Ti, 316LMod, 317L/N, 310S, 253MA, 330, 904L, S31803, S32205, S32750, S31254, XM-19, TP410, TP405, TP420, TP430, TP430Ti, TP403, TP409, TP444,TP439, TP446, etc. Seamless Carbon&Alloy Steel Tube ASTM A179, A192, A210, A213, DIN17175, EN10216-2, etc. Gr.A1, GR.C, T2, T5, T9, T11, T12, T17, T21, T22, T23, T24, T36, T122, 15Mo3, 16Mo3, P235GH, P265GH, 13CrMo44, etc. Available grades for tubes and pipes are as below. Ferrite/Martensite: TP410, TP405, TP420, TP430, TP430Ti, TP403, TP409, TP444, TP439, TP446, etc. Alloy Steel Grade: T1, T1a, T2, T5, T9, T11, T12, T17, T21, T22, T23, T24, T36, T122, P12, P5, P91, 15Mo3, 12CrMo, 15CrMoG, 1Cr5Mo, 27SiMn, 09Cr2AlMoRe, 09CrMoAl, 13CrMo44, 10CrMo9-10, 09CrCuSb, 09MnNiD, 09MnD, 09CuPCrNi, 07Cr2AlMo, etc. Austenitic/Super Austenitic Steel Grade: 304/304L, 316/316L, 314, 321, 347H, 316Ti, 316LMod, 317L/N, 310S, 253MA, 330, 904L, S31254, XM-19, etc. Nickel Alloy Grade: N02200/2201, N04400, N06600, N06601, N06625, N06852, N06219, N06690, N08800/8810/8811, N08825, N08028, N08535, N08904, N08925, N08926, N010276, N06022, etc. Duplex/Super Duplex Stainless Steel: S31803, S32304, S31500, S32550, S32750, S32760, etc. Carbon steel tube:A179,A192,A210,DIN17175,etc. Our product enjoys a good reputation in the market of the USA, Canada, Brazil, Mexico, Germany, Italy, Netherland, Britain, Australia, Russia, South Korea, Thailand, Philippines, Malaysia, Iran, South Africa, Ghana and etc. If you have any demands or inquiries, please feel free to send it to us.