Company Details
  • Torich International Co.,Ltd--The Steel Tube Maker

  •  [Zhejiang,China]
  • Business Type:Distributor/Wholesaler , Manufacturer , Service , Trade Company
  • Main Mark: Africa , Americas , Asia , Caribbean , East Europe , Europe , Middle East , North Europe , Oceania , Other Markets , West Europe , Worldwide
  • Exporter:31% - 40%
  • Certs:GB, ISO9001, ISO14001
  • Description:Cold Draw,Precision Seamless,GB/T3639-1983
Torich International Co.,Ltd--The Steel Tube Maker Cold Draw,Precision Seamless,GB/T3639-1983
Home > Products > Precision Steel Tube > Cold Drawn / Cold Rolled Precision Seamless Steel Tube 20# 45

Cold Drawn / Cold Rolled Precision Seamless Steel Tube 20# 45

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    Payment Type: L/C,T/T
    Incoterm: FOB,CIF
    Min. Order: 5 Ton
    Delivery Time: 45 Days

Basic Info

Model No.: GB/T3639-1983

Type: Seamless

Application: Hydraulic Pipe

Section Shape: Round

Surface Treatment: Oiled

Usage: Machinery Industry

Technique: Cold Drawn

Material: Carbon Steel

Deminsion: 6-100mm

Delivry Condition: +N +C +LC +SA +A

Additional Info

Packaging: In bundles packaging

Productivity: 25000

Brand: Torich

Transportation: Ocean

Place of Origin: China

Supply Ability: 5000tons per year

Certificate: ISO9001 TS 16949 ISO14001

Port: Shanghai,Ningbo

Product Description

Cold drawn or cold-rolled precision seamless steel tubes

China Precision Steel Tube leading supplier, choose the high quality Hydraulic Precision Steel Tube, Precision Carbon Steel Tube, Precision Seamless Steel Tube, CDS Steel Tube, CDW Steel Tube

Relative standard :

GB/T222 permissible tolerance for chemical composition of steel products.

GB/T223.5 Steel and iron-Determination of acid-soluble silicon and total silicon content-Reduced molybdosilicate spectro photometric method(GB/T223.5-2008,ISO 4829-1:1986,ISO 4829-2:1988,MOD)

Mechanical properties

Steel grade 10# 20# 35# 45# Q345B

Steel grade deliver conditions
+C +LC +SR +A +N
Rm/Mpa A/% Rm/Mpa A/% Rm/Mpa ReH/Mpa A/% Rm/Mpa A/% Rm/Mpa ReH/Mpa A/%
No less than
10 430 8 380 10 400 300 16 335 24 320-450 215 27
20 550 5 520 8 520 375 12 390 21 440-570 255 21
35 590 5 550 7 510 17 ≥460 280 21
45 645 4 630 6 590 14 ≥540 340 18
Q345B 640 4 580 7 580 450 10 450 22 490-630 355 22

Deliver condition:

Cold working/Hard condition:+C

No heat treatment after the final cold working process.

Cold working/Soft condition:+LC

After the final treatment there is a suitable cold working process

Stress relieving annealed conditio:+SR

After the final cold working process there is a stress relief heat treatment in a controlled atmosphere

Annealed condition:+A

After the final cold working process the tubes are fully annealed in a controlled atomosphere.

Normalised condition:+N

After the final cold working operation the tubes are normalized in a controlled atomosphere.

The permissible tolerances of the internal and external diameter unit:mm

Wall thickness(S)/extrernal diameter Permissible tolerance
S/D≥1/20 According to the specified value of the table 1
1/40≤S/D<1/80 According to 1.5 times of specified value of the table 1
S/D<1/40 According to double of specified value of the table 1

Length is 2000-12000mm Fixed length and multiple length is available.

Tolerance for length , a)the length ≤5000mm +5,0mm

B)the length >5000mm +10,0mm

Every multiple length should leave incision margin according to the following requirement for the steel tubes delivered by multiple length.

  1. External diameter≤159mm:5mm~10mm
  2. External diameter>159mm:10mm~15mm

Curvature:≤3.0mm/m

The steel tubes` total length curvature external diameter ≥16mm

  • ReH≤500Mpa,≤0.15%L
  • ReH>500Mpa,≤0.20%L


Looking for ideal Cold Draw Manufacturer & supplier ? We have a wide selection at great prices to help you get creative. All the Precision Seamless are quality guaranteed. We are China Origin Factory of GB/T3639-1983. If you have any question, please feel free to contact us.

Product Categories : Precision Steel Tube

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  • Cold Drawn / Cold Rolled Precision Seamless Steel Tube 20# 45
  • Cold Drawn / Cold Rolled Precision Seamless Steel Tube 20# 45
  • Cold Drawn / Cold Rolled Precision Seamless Steel Tube 20# 45
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