Automotive Tube


Dingxin manufactures high precision cold drawn and cold rolled seamless steel tubes for auto parts in transmission, powertrain, steering and suspension systems. With outstanding and stable quality, Dingxin is serving a variety of leading domestic and international OEMs as well as mid to high-end aftermarket auto parts manufacturers.


Optimized mechanical properties enabling easy bending, flaring, flattening and other processing

Good surface roughness suitable for electrophoresis, coating, galvanization and chroming processing

High precision

Excellent microstructure

Product parameter

Size Range

O.D 16-245mm, WT 1-32mm

Executive Standard

GB/T3639, Cold-drawn or cold-rolled precision seamless steel

DIN2391, Seamless precision steel tubes

DIN2393, Welded Precision Steel Tubes 

EN10305-1, Steel tubes for precision applications Part 1: Seamless cold drawn tubes

EN10305-2, Cold drawn steel tubes for precision applications Part 2: Welded cold drawn tubes

ASTM A519, Seamless Carbon and Alloy Steel Mechanical Tubing

ASTM A513, Electric-Resistance-Welded Carbon and Alloy Steel Mechanical Tubing

JIS G3445, Carbon Steel Pipe For Mechanical Purpose

JIS G4051, Carbon Steels for Machine Structural Use

According to customer’s specific requirements

Customize your tube

Steel Grade

10#, 20#, 35#, 45#, 55#, Q355B, 25Mn, 16MnCr5, 20MnCr5, 30CrMo, 35CrMo, 42CrMo, 20Cr, 40Cr, 20CrNiMo ; ST37, ST45, ST52, 34CrMo4, 42CrMo4 ; E235, E255, E355 ; 1010, 1020, 1026, 1035, 1045, 1050, 4130, 4140, 8620 ; STKM 11A, STKM 12B, STKM 13C, STKM 14B ; S10C, S20C, S35C, S45C and etc.

Delivery Condition

Cold drawn/hard (+C) (BK)

Cold drawn/soft (+LC) (BKW)

Cold drawn and stress relieved (+SR) (BKS)

Annealed (+A) (GBK)

Normalized (+N) (NBK)

Quenched and Tempered (QT)

Value-added Service

  • Cut to length

    Cut to length

  • Chamfering (outside diameter: 33-89mm)

    Chamfering (outside diameter: 33-89mm)


Passenger Vehicle

  • Ball Cage

    Ball Cage

  • Shock Absorber

    Shock Absorber

  • Gear Shaft

    Gear Shaft

  • Cylinder Sleeve

    Cylinder Sleeve

  • Tie Rod

    Tie Rod

  • Bushing


  • Camshaft


  • Tensioner Pulley

    Tensioner Pulley

  • Drag Link

    Drag Link

  • Stabilizer Link

    Stabilizer Link

  • Other Linkage

    Other Linkage

Commercial Vehicle

  • V Torque Rod

    V Torque Rod

  • Drag Link

    Drag Link

  • I Torque Rod

    I Torque Rod

  • Stabilizer Link

    Stabilizer Link

End Users



  • 2004

    Established and put into production

  • 2007

    Certified by ISO9001 quality management system

  • 2009

    Served SINOTRUK, DONGFENG TRUCKS, SAIC, SAIC-GM as Tire2/3/4 supplier

  • 2011

    Started large-scale supply of tubes for Automobile (OEM, OES & Aftermarket) at mass production

  • 2012

    Certified by TS16949 quality management system

  • 2013

    Served Volkswagen, SAIC-VM as Tier 2/3 supplier

  • 2015

    Served SGMW as qualified Tier 2/3 supplier

  • 2016

     Served Great Wall, Nissan as qualified Tier 3 supplier

  • 2017

    Awarded as a typical technological enterprise in Zhejiang province

  • 2018

    Served Geely as qualified Tier 3 supplier

  • 2018

    Certified by IATF16949 quality management system;

    Awarded as National High-tech Enterprise