Automotive Precision Seamless Tubes

Product description:

High-precision cold-drawn/cold-rolled seamless steel tubes for engine, gearbox, driveline, steering and chassis components in passenger cars and commercial vehicles. Materials, dimensions and delivery requirements can be discussed for each component application.

Product advantages:

Good mechanical properties for subsequent cold bending, extrusion, flaring and other forming operations

Good surface finish for electrophoretic coating, painting, powder coating, galvanizing and chromium plating

High dimensional accuracy

Good metallurgical structure

Product inquiry Contact details

Product specifications

Specifications:

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

Standards:

GB/T3639 Precision seamless steel tubes, cold-drawn or cold-rolled

DIN2391, Cold-drawn precision seamless steel tubes

DIN2393, Welded precision steel tubes with special dimensional accuracy

EN10305-1, Steel tubes for precision applications — Technical delivery conditions — Part 1: Seamless cold-drawn tubes

EN10305-2: Steel tubes for precision applications — Technical delivery conditions — 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 tubes for machine structural purposes

JIS G4051, Carbon steels for machine structural use

According to customer-specific technical requirements

Custom products

Steel grades:

10#, 20#, 35#, 45#, 55#, Q355B, 25Mn, 16MnCr5, 20MnCr5, 30CrMo, 35CrMo, 42CrMo, 20Cr, 40Cr, 20CrNiMo ;

8620H, 40CrNiMoA, 34CrNiMo6, 18CrNiMo7-6, 31CrMoV9, 19CrNi5H；

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 other grades

Delivery conditions:

Cold finished / hard (+C) (BK)

Cold finished / soft (+LC) (BKW)

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

Annealed (+A) (GBK)

Normalized (+N) (NBK)

Quenched and tempered (QT)

Value-added services

Cut to length as required
Chamfering (O.D.: φ 33-89mm)

Applications

Passenger cars

CV joint housings
Shock absorbers
Shift fork shafts
Cylinder liners
Steering tie rods
Bushings
Camshafts
Tensioner pulleys
Steering drag links
Anti-roll bars
Other connecting rods

Commercial vehicles

Anti-roll bars
I-type torque rods
Steering rods
V-type torque rods

Selecting tubes for automotive components

Start with the component application and subsequent processing, then confirm outside diameter, wall thickness, tolerances, grade and delivery condition. Confirm the applicable combination against drawings and technical requirements.

Common selection questions

What information is needed for an automotive tube inquiry?

Provide the component application, drawing, OD, wall thickness, tolerances, grade, standard, delivery condition, quantity and delivery requirements.

Are the listed grades interchangeable?

Do not assume interchangeability from grade names. Check the applicable standard, chemistry, mechanical properties, delivery condition and component design requirements.

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