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GB/T 3639 Cold-drawn or Cold-rolled Precision Seamless Steel Tubes for Hydraulic Equipment

Minimum Order Quantity : 5 tons Price : 1000-1800 USD/ton
Packaging Details : In bundles or as per requests Delivery Time : 45-60days after order confirmed
Payment Terms : L/C, D/A, D/P, T/T, Western Union, MoneyGram Supply Ability : 60000 Ton per Year
Place of Origin: China Brand Name: TORICH
Certification: ISO 9001; ISO14001; TS16949 Model Number: GB/T 3639

Detail Information

Product Name: GB/T 3639 Cold-drawn Or Cold-rolled Precision Seamless Steel Tubes For Hydraulic Equipment Standard: GB/T 3639
Material: 10#, 20#, 35#, 45#, Q345B Etc Production Method: Produced By Cold Drawn Or Cold Rolled
Alloy Or Not: Non-alloy Section Shape: Round
End Protection: Plain Type: Seamless Precision Steel Tube
Length: <12m Or As Customer Demand Package: In Bundles Or As Per Requests
High Light:

precision steel pipe


precision pipes and tubes

Product Description

GB/T 3639 Cold-drawn or Cold-rolled Precision Seamless Steel Tubes for Hydraulic Equipment


Products Description:

The GB/T 3639 is modified in relation to EN 10305-1: 2002( Steel tubes for precision applications-Technical delivery

conditions part 1: Seamless cold drawn tubes).The Cold-drawn or Cold-rolled Precision Seamless Steel Tubes are

produced in strict accordance with the Chinese GB/T 3639 standard. Carbon steel pipe billets are used as raw

materials, treated with imported lubricants from Europe, and manufactured by precision cold drawing or rolling.

These precision seamless steel tubes with special dimensional accuracy and high surface quality requirements

are suitable for mechanical structures, hydraulic equipment and automobiles.


Size Range:OD: 4-200mm, WT: 0.5-22mm, Length: acc to customer's requirement

Our Regular Size:31.75x2.55mm, 48.3x2.65mm, 50.8x2.4mm etc


Main Materials: ST35(E235),ST37,ST45(E255), ST52(E355), 10#, 20#, 35#, 45#, etc.


TORICH QUALITY ASSURANCE: High-precision, Good Surface Quality, Stable quality, Smooth Roughness


Production Processs: Seamless Cold Drawn or Seamless Cold Rolled + Heat Treatment


Main Delivery Conditions:NBK(+N) GBK(+A) BK(+C) BKW(+LC) BKS(+SR)

Designation Symbol Description
Cold drawn/hard +C No heat treatment after the final cold drawing process.
Cold drawn/soft +LC After the final heat treatment there is a suitable drawing pass.
Cold drawn and stress relieved +SR After the final cold drawing process there is a stress relief heat treatment in a controlled atmosphere.
Annealed +A After the final cold drawing process the tubes are annealed in a controlled atmosphere.
Normalized +N After the final cold drawing operation, the tubes are normalized in a controlled atmosphere.


Delivery Condition Symbol in Accordance With GB/T 3639 and EN10305-1.

The standard classification and code name The EN 10305-1:2002classification and code name


The Standard Brand With the Original Standard Control

The standard brand The EN 10305-1:2002 brand
10 E215
20 E255 (EN 10305-1 annex A)
35 C35E(EN 10305-1 annex A)
45 C35E(EN 10305-1 annex A)
Q345B E355


Product Pictures of Precision Seamless Steel Tubes :

cold-rolled precision seamless steel tube /precision-steeltube.comcold-rolled precision seamless steel tube /

GB/T 3639 Cold-drawn or Cold-rolled Precision Seamless Steel Tubes for Hydraulic Equipment 2



Q: Are you trading company or manufacturer ?

A: A professional steel pipes materials inventor, manufacturer and solution provider.


Q: How long is your delivery time?

A:Generally it is 7-14 days if the goods are in stock. or it is 30-60 days if the goods are not in stock, it is according to quantity.


Q: Do you provide samples ? is it free or extra ?

A: Yes, we could offer the sample for free charge but need pay the cost of freight.


Q: What is your terms of payment ?

A: Payment<=1000USD, 100% in advance. Payment>=1000USD, 30% T/T in advance ,balance before shippment.
If you have another question, pls feel free to contact us


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