Preision Tube for Automobile or Hydraulic Usage

Model NO.: KM-0612
Size: 10~100mm
Thickness: 1~20mm
Technique(Industrial Craft): Cold Drawn and Cold Rolled
Heat Treatment: Cold Finished, Quenched and Tempered, etc
Delivery Condition: Bk(+C), Bkw(+LC), Bks(+Sr), Gbk(+a),Nbk(+N)
Export Packing: Internal Wrapped with Plastic Foil, External Wrapp
Trademark: Kingmetal
Transport Package: in Bundle or Wooden Cases
Specification: 10~100mm
Origin: Made in China
HS Code: 73043190

DIN 2391 EN 10305-1 EN10305-4 preision tube for automobile or hydraulic usage

Specifications

DIN 2391 EN 10305-1 EN10305-4 preision tube for automobile or hydraulic usage 
Cold drawn precision seamless carbon steel tube

 DIN 2391 EN 10305-1 EN10305-4 preision tube for automobile or hydraulic usage  

 

Production range: OD from 10 mm to 100mm; wall thickness up to 10mm

 

Steel grades:

 

Standard Tubes

Standards

TDR Standards

Steel Grades

DIN

1629
1630
2391-2
17204
17210

ST 37 / 44 / 52
ST 37.4 / 44.4 / 52.4
ST 35 /  45 / 52
C22 - Ck 22 - Cm22 -
C35 - Ck 35 - Cm 35
C45 -  Ck 45 - Cm 45 - 34 CrMo4
C15 - Ck 15 - Cm 15 - 16MnCr5

EN

10305-1

E215/235/355/255
26Mn 5
C35E
C45E
20V1 (E410)
26Mo2
25CrMo4
42CrMo4

ASTM

A 519

1010
1020
1035

BS

BS 6323

CFS3
CFS4
CFS5
CFS6
CFS7

NFA

49310

TU 37 b
TU 52  XC

 

 

DELIVERY CONDITIONS

The tubes can be produced in the following delivery conditions: 

BK (+C) Cold finished/hard (cold finished as drawn).

No heat treatment after the last cold forming process.

 

BKW (+LC) Cold finished/soft (lightly cold worked)

After the last heat treatment there is a light finishing pass (cold drawing).

 

BKS (+SR) Cold finished/stress relieve annealed. 

After the final cold forming process the tubes are stress relieve annealed.

 

GBK (+A) Annealed. 

After the final cold forming process the tubes are annealed in a controlled atmosphere.

 

NBK (+N) Normalized. (Mainly focus on)

After the final cold forming process the tubes are annealed above the upper transformation point in a controlled atmosphere.

 

 

2 SURFACE TREATMENTS

1. Bare Tube (No coating): Bright and smooth, Surface Roughness both inner and outer surface  0.2Ra Maximum for special requirement

2. Surface Coating

 A. Silver galvanized

 B. Yellow galvanized

 C. Olive green coated

Layer thickness: 8-20um, Salty Spray Test: 48-150 hours

3.  Black phosphate

 

3 APPLICATIONS

1. Automotive fields

 A. Fuel injection lines/nozzles

 B. CNG (Compressed Nature Gas) tube-- Burst pressure: 1307Bar, Working Pressure: around 350bar

C. Drive transmission: Steering column elements

 D. Gear shafts, hand brake, front axles, airbag inflators, stabilizers, seat fasteners, front-wheel drive shafts

2. Hydraulic Fields

A. Hydraulic circuits (HPL), pneumatic lines, and hydraulic suspension 

B. Hydraulic cylinders (HPZ)

 
Mechanical properties at room temperature    
Delivery condition BK BKW GBK NBK
steel Grade Rm Mpa (Min) A %(Min) Rm Mpa(Min) A %(Min) Rm Mpa(Min) A %(Min) Rm Mpa(Min) ReH Mpa(Min) A %(Min)
St30Al or E215 430 8 380 12 280 30 290 to 430 215 30
St35 or E235 480 6 420 10 315 25 340 to 480 235 25
St45 or E255 580 5 520 8 390 21 440 to 570 255 21
St52 or E355 640 4 580 7 450 22 490 to 630

Preision Tube for Automobile or Hydraulic Usage
Preision Tube for Automobile or Hydraulic Usage

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