Mechanical Seamless Steel Tubing

Standards for Mechanical Steel Tubing

• ASTM A 53
• It is a standard especially applicable for black and hot-dipped, zinc-coated, welded and seamless mechanical steel pipes.
• ASTM A519
• This standard is suitable for seamless carbon steel and alloy mechanical steel tubing.
• JIS G3441
• It is applicable for alloy mechanical steel pipes.
• JIS G3444
• This standard is suitable for carbon steel tubes for general structural purposes.
• JIS G3445
• It is applied to carbon steel tubes for machine structural purposes (mechanical steel tubing).
• DIN 2391
• This standard is well suited for seamless precision mechanical steel pipes.
• EN10305
• It is applicable for steel tubes for precision applications and seamless cold drawn tubes.
• EN 10210
• This standard is suitable for seamless structural steel pipes (especially for mechanical steel tubing).

Main Steel Grades of Mechanical Steel Pipe JST can provide various grades of mechanical steel tubings for customers. The details are as follows:

• ASTM A 53: Grade A, Grade B, Grade C, Type F, Type E
• ASTM A519: 1010-1045, 4130-4142, 5135
• JIS G3441: SCM 415 TK, SCM 418 TK, SCM 420 TK, SCM 430 TK, SCM 435 TK, SCM 440 TK
• JIS G3444: STKM 11A, STKM 12, STKM 13, STKM 14, STKM 15, STKM 16, STKM 17, STKM 18, STKM 19, STKM 20
• DIN 2391: St30Si, St30A1, St35, St45, St52
• EN10305: E235, E355
• EN 10210: S235JRH, S275J0H, S275J2H, S355J0H, S355J2H, S275NH, S355NH, S275NLH, S355NLH

Applications of Mechanical Steel Pipe Mechanical steel tubing can be used as seamless steel tube with general structure and mechanical structure.

Size Range

• Outer Diameter: Hot finish: 2" - 30", Cold drawn: 0.875" - 18"
• Wall Thickness of Mechanical Steel Pipe: Hot finish: 0.250" - 4.00", Cold drawn: 0.035" - 0.875"
• Length of Mechanical Steel Tubing: Random Length, Fixed Length, SRL (Single Random Length), DRL (Double Random Length)

Advantages

• JST owns advanced rolling technology. Under this technology, we can control the allowable size deviation within the standard range, even reduce the allowable tolerance range. We are also able to provide other specifications of mechanical steel pipes according to customers' requirements.
• We also configure fixed-length cutting machines. We can cut mechanical steel tubings according to the fixed length required by our customers and guarantee the cutting precision.
• JST possesses micro oxidation or non-oxidation thermal treatment furnace with the furnace temperature within 5℃. There is no oxide layer on the surface of mechanical steel pipes. This also contributes to high-quality surface, smooth surface and stable performance of pipes.
• Our company mainly does many inspections for mechanical steel tubing, such as chemical component analysis, mechanical properties (ultimate tensile strength, yield strength, elongation), technical properties (flattening test, flaring test, bending test, hardness test, blow test, impact test, etc.) and exterior size inspection.
• JST also configures a professional physical and chemical testing center with professional testing and technical personnel, and international advanced testing equipment for testing mechanical steel pipes (mechanical steel tubings). We have German full spectrum direct-reading spectrometer, Japan metallurgical microscope, impact testing machine, tensile testing machine, computer controlled electro-hydraulic servo universal testing machine and a variety of machine tools. They can do tensile, flaring, flattening, curling and other physical tests for the mechanical steel pipe so as to guarantee its stable performance.

Delivery of Mechanical Steel Tubing We deliver our products in the following states, such as BKS, NBK, BK, BKW, GBK (+A), NBK (+N), BK (+C), and so on. (BKS: cold finished and stress-relieved; BK: cold finished; BKW: cold finished (soft); GBK (+A): annealed; NBK (+N): normalized; BK (+C): cold finished (hard)).

Packaging of Mechanical Steel Pipe JST packages mechanical steel tubings with plastic plugs in both ends. We use hexagonal bundles of pipes (max. 2, 000 kg) with several steel strips. Two tags are on each bundle. We can also wrap products in waterproof paper, PVC sleeve and sackcloth with several steel strips.

Established in 1984, Jiangyin Changjiang Steel Tube Making Factory has been engaged in manufacturing mechanical steel pipes for about 30 years. We mainly supply structure pipe, fluid pipe, high pressure boiler pipe, API pipe, marine pipe, alloy pipe, tubing, casing, line pipe, etc. Our mechanical steel tubings are extensively used in metallurgy, port, ship-breaking, manufacturing, chemical engineering, transportation and other industries. They are well appreciated for their advanced design, sophisticated manufacturing, excellent quality and full service.