Alloy Steel Seamless Tubes

Api 5ct standard tolerance.

Plain ends. Both ends protected with plastic caps, metal strip for each bundle.Each bundle's max weight is 3ton, shipping marks according to customers's requirements.

Grade: 10#-45#, api j55-api p110, 10#, 20#, 45#, api j55, api k55, api l80, api n80, api p110 thickness: 2 - 200 mm section shape: section shape place of origin: jiangsu, china (mainland) secondary or not: non-secondary application: boiler pipe technique: erw certification: api surface treatment: black special pipe: emt pipe alloy or not: is alloy c %: 0.28~0.33 si %: 0.1~0.35 mn %: 0.40~0.60 cr %: 0.9~1.1 mo %: 0.15~0.25 annealing hardness: 235 factory area: 2, 000, 000©o employees: 13, 000: 13, 000 business year: since 2000 shape: square. Rectangular.Round: square. Rectangular.Round







treatment: black special pipe: emt pipe alloy or not: is alloy c %: 0.28~0.33 si %: 0.1~0.35 mn %: 0.40~0.60 cr %: 0.9~1.1 mo %: 0.15~0.25 annealing hardness: 235 factory area: 2, 000, 000©o

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.

We deals in the following products of India, China, Taiwan and Korea Origin:-
1)Hot Rolled Steel (Hot Rolled Sheets, Hot Rolled Coils, Hot Rolled Plates, Hot Rolled Bars etc)
2)Galvanized Steel (Galvanized Steel Tapes, Galvanized Steel Wires, Galvanized Steel Strips, Galvanized Steel Coils, Galvanized tubes etc)
3)Cold Rolled Steel (Cold Rolled Steel Strips, Cold Rolled Steel Coils, Cold Rolled Sheets etc)
4)Stainless Steel (Stainless Steel Strips, Stainless Steel Coils, Stainless Steel Wire, Hardened and Tempered Spring Steel, Stainless Spring Steel, Spring Steel Wires etc)
5)Steel Tube and Pipes ( ERW, CRW, CRS, Black, Galvanized, Stainless )
6)Forged Column Clamps, Girder Clamps, Pressed Clamps, Rapid Clamps, Support Clamps & Wedge Clamps.
7)Heavy Duty Props & Light Duty Props.
8)Nuts, Bolts, Nails & Fastners
9)System Scaffolding, Base Plate & Adjustable Base.
10)Steel Tie Rod, Waller Plates and Wing Nuts.
11)Drop Forged and Pressed Sheet Metal Couplers of all types.
12)Steel Billets, Steel Angle & Steel Channels.

Alloy steel seamless pipes and tubing
Mechanical tubing
Structural alloy pipes
Boiler tube
SS seamless pipes and tubing
Duplex seamless pipes
Corrosion resistant alloy seamless pipes
Metallurgical clad pipes
Tubing and casing
Line pipe
Drill pipe

We can supply this kind of products as follows:
Astm a213, seamless ferritic and austenitic alloy-steel boiler, superheater, and heat-exchanger tubes
Astm a335, seamless ferritic alloy-steel pipe for high-temperature service
Jis g3458, alloy steel pipes (stpa 12/ 20/ 22/ 23/ 24/ 25/ 26)
Jis g3462, alloy steel for boiler and heat exchanger tubes (stba12/ 13/ 20/ 22)
Jis g3467, steel tubes for fired heater (stf 410/stfa 12/ 22/ 23/ 24/ 25/ 26)




Standard export packing

Hollow Section steel Tube is the general name for the steel pipe other than thecircular steel pipe. Such as square, rectangle, oval,elliptical, cone, trapezoidal, spiral, etc. Different steel pipe can more adapt to the particularity of use conditions, save metal and improve the labor productivity of parts manufacturing. It is widely used in aviation, automobile, shipbuilding, mining machinery, agricultural machinery, construction, light textile and boiler manufacturing. The methods of producing different pipes are cold pulling, electric welding, extrusion and hot rolling, etc. Compared with the round tube, the different tubes generally have a larger moment of inertia and cross section modulus, and have a large bending resistance and torsion resistance, which can greatly reduce the structural weight and save steel.

High Precision Steel Pipe for Gas spring Cylinder
Type:Seamless and Welded Steel Tube
Roughness 0.1-0.8ra
Material E195-E235,Q195-Q235,#10,#20,#45,SAE1010,SAE1020
Surface:Black/bright
Standard:DIN, GB, JIS, DIN 17175, DIN 2391, GB 5310-1995, GB/T 13793-1992, GB/T 3094-2000, GB/T 8163-1999, JIS G3101
Size :OD 3mm-140mm Thickness 0.5-20mm
Processing :Cold rolled /cold drawn
1. BK (+C) No heat treatment after last cold forming process.
2. BKW (+LC) After last heat treatment there is a light finishing pass (cold drawing)
3. BKS (+SR) After the final cold forming process the tubes are stress relieve annealed.
4. GBK (+A) After the final cold forming process the tubes are annealed in a controlled atmosphere.
5. NBK (+N) After the final cold forming process the tubes are annealed above the upper
Woven bag / wooden or crate carton/ Bundle Packing/ Plain end or vanished as per customer's request.
Usage: Gas Spring Cylinder

We deals in the following products of India, China, Taiwan and Korea Origin:-
1) Hot Rolled Steel (Hot Rolled Sheets, Hot Rolled Coils, Hot Rolled Plates, Hot Rolled Bars etc.)
2) Galvanized Steel (Galvanized Steel Tapes, Galvanized Steel Wires, Galvanized Steel Strips, Galvanized Steel Coils, Galvanized tubes etc.)
3) Cold Rolled Steel (Cold Rolled Steel Strips, Cold Rolled Steel Coils, Cold Rolled Sheets etc.)
4) Stainless Steel (Stainless Steel Strips, Stainless Steel Coils, Stainless Steel Wire, Hardened and Tempered Spring Steel, Stainless Spring Steel, Spring Steel Wires etc.)
5) Steel Tube and Pipes (ERW, CRW, CRS, Black, Galvanized, Stainless)
6) Forged Column Clamps, Girder Clamps, Pressed Clamps, Rapid Clamps, Support Clamps & Wedge Clamps.
7) Heavy Duty Props & Light Duty Props.
8) Nuts, Bolts, Nails & Fasteners
9) System Scaffolding, Base Plate & Adjustable Base.
10) Steel Tie Rod, Waller Plates and Wing Nuts.
11) Drop Forged and Pressed Sheet Metal Couplers of all types.
12) Steel Billets, Steel Angle & Steel Channels.


Price: After receiving complete details