Description

Inner Hexagonal Steel Pipe is a seamless steel pipe with a circular outer surface and a hexagonal inner surface, is a type of special-shaped pipe. Inner Hexagonal Steel Pipe is mainly used to connect, support and fix various mechanical equipment, with high strength, rigidity and stability.

Applications of Inner Hexagonal Steel Pipe:

Inner Hexagonal Seamless Steel Pipe has a wide range of uses, including but not limited to structural support (such as bridges, high-rise buildings and industrial facilities), automobile manufacturing (such as chassis, suspension systems and engine mounts), aerospace (such as aircraft frames and rocket engine mounts), shipbuilding, pipeline support, agricultural machinery and decoration industries, etc.

Inner hexagonal steel pipes are primarily used in mechanical transmission and engineering structures where torsional resistance, anti-rotation, shaft assembly, and lightweight construction are all required.

1. Mechanical Transmission Components: Inner hexagonal steel pipes are used as bushings, guide shafts, or connecting rods. The external hexagonal shape facilitates wrench clamping or embedded positioning, while the internal circular hole allows for shaft insertion or bearing mounting, achieving anti-relative rotation without affecting shaft rotation. Commonly found in servo indexing tables, automated guideways, and couplings.

2. Nut and Fastener Manufacturing: Inner hexagonal steel pipes are directly used as hexagonal nut blanks (with threaded internal holes), eliminating drilling processes and improving material utilization.

3. Structural Support and Lightweight Components: Inner hexagonal steel pipes replace round tubes in construction, bridges, and engineering machinery, offering higher section modulus, stronger bending and torsional resistance, while reducing weight and saving steel.

4. Automotive and Aerospace Components: Inner Hexagonal Steel Pipes are used in chassis components, suspension connectors, drive shaft bushings, and other parts requiring high rigidity, precise fit, and weight reduction.

5. Tools and Specialized Equipment: Such as hand saw guides, hydraulic/pneumatic cylinders, and clamping positioning elements, utilizing the external hexagonal anti-rotation stability and internal sealing/sliding compatibility.

Inner Hexagonal Steel Pipes are typically manufactured using cold drawing/precision rolling processes, achieving high dimensional accuracy (tolerance within ±0.05mm). They are suitable for high torque transmission, space-constrained applications, and scenarios requiring the integration of standard tools (such as hex wrenches) or bearing seals.

Production Range	Outer Diameter:6-530mm (0.24 inch – 21.18 inch)
Production Range	Wall Thickness:0.8-200mm (0.03 inch – 7.89 inch)
Material / Grade	Carbon Steel: GB/T 3094: 10#, 20#, 35#, 45#, 55#, Q235B, Q235C, CF53, A105 ASTM A519: 1010, 1020, 1026, 1035, 1045, 1050 DIN17121/EN 10297-1, DIN1629/DIN2391/EN 10305-1: C10/CK10, C22/CK22, C35/CK35, C45/CK45, CF53 JIS3441/JIS3444/JIS3445: STKM11A, STKM12A/STKM12B/STKM12C, STKM13A/STKM13B/STKM13C JIS G4051: S10C, S20C, S25C, S35C, S45C, S55C
Material / Grade	Alloy steel : GB/T 3094: 16Mn(Q345B), 20Cr, 40Cr, 15CrMo, 20CrMo, 28CrMo, 30CrMo, 35CrMo, 42CrMo, 20CrMnTi, 40MnMoV, 20Mn2, ZF6, 16MnCr5 20MnCr5, 38Mn2V, 09CrCuSb(ND) ASTM A519: 5120, 5140, 4130, 4135, 4140 DIN17121/EN 10297-1, DIN1629/DIN2391/EN 10305-1: ST52, EN10084-1998 20Cr4, 41Cr4, 15CrMo4, 25CrMo4, 35CrMo4, 42CrMo4, 16MnCr5 JIS3441/JIS3444/JIS3445: SCM432/SCRRM3, SCM4 JIS G4053: JIS SCr420, JIS SCr440, SCM415, SCM420
Tolerance	Can be customized according to customer’s requirements
Technique	Cold Drawn / Cold Rolled
Shape	Triangle, Hexagon, Square, Rectangle, Octagon, Lemon Pipe and Others can be customized
Further Processing for Steel Tubes	Cutting, Chamfer, Threading, Inner diameter or Outer Diameter Lathe, Surface Shot Blasting, Laser Marking