Home Companies TORICH INTERNATIONAL LIMITED

350mm Cold Drawn Carbon Seamless Steel Pipe For Chemical Composition

Contact Us

[China]

Trade Verify

Address: Suite 1004, Hongan Plaza, #258 Die Yuan Road, Yinzhou District, Ningbo City, China

Contact name:Richard SHEN

TORICH INTERNATIONAL LIMITED

Verified Suppliers
  • Trust
    Seal
  • Verified
    Supplier
  • Credit
    Check
  • Capability
    Assessment

350mm Cold Drawn Carbon Seamless Steel Pipe For Chemical Composition

Country/Region china
City & Province ningbo zhejiang
Categories Nickel

Product Details

Cold drawn or cold-rolled precision seamless steel tubes

 

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 gradedeliver conditions
+C+LC+SR+A+N
Rm/MpaA/%Rm/MpaA/%Rm/MpaReH/MpaA/%Rm/MpaA/%Rm/MpaReH/MpaA/%
No less than
104308380104003001633524320-45021527
20550552085203751239021440-57025521
3559055507   51017≥46028021
4564546306   59014≥54034018
Q345B640458075804501045022490-63035522

 

 

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 diameterPermissible tolerance
S/D≥1/20According to the specified value of the table 1
1/40≤S/D<1/80According to 1.5 times of specified value of the table 1
S/D<1/40According 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


 
 
 
  

 

QUALITY CONTROL

1~ Incoming Raw Material Inspection
2~ Raw Material Segregation to avoid steel grade mix-up
3~ Heating and Hammering End for Cold Drawing
4~ Cold Drawing and Cold Rolling, on line inspection
5~ Heat Treatment, +A, +SRA, +LC, +N, Q+T
6~ Straightening-Cutting to specified length-Finished Measuring Inspection
7~ Machanical Testing in own labs with Tensile Strength, Yield Strength, Elongation, Hardness, Impact, Mictrostruture etc
8~ Packing and Stocking.

 

100% of our steel tubes are dimensionally checked
100% of our steel tubes are visually checked to assure they have a perfect surface condition and no surface defects.
100% eddy current test and ultrosonic test to eliminate longitudinal and transversal defects.

 

Hot Products

Cold drawn or cold-rolled precision seamless steel tubes Relative standard : GB/T222 permissible ...
TORICH Custom Round 34CrMo4 Alloy Steel Pipe With Heat Treatment Good surface quality Material...
TORICH GB/T 24187 Cold-Drawn Precision Single Welded Steel Tubes Spec: Material:C Si Mn P S Size ...
GB/T 21832 Austenitic-Ferritic (duplex) Grade Stainless Steel Welded Tubes and Pipes Spec: Material...
Stainless Steel Hard Chrome Plated Piston Rod CK45 ST52 20MNV6 42CRMO4 40CR Material: CK45;ST52...
Seamless Carbon and Alloy Steel Special Pipes , Special Steel Pipe Special Shape Seamless Carbon and ...