Steel Pipe

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Cold drawn pipe

We always adhere to the high quality and service, strive for excellence in raw materials, high precision and advanced equipment, and perfect technology. We can provide all kinds of best quality products according to the different requirements.
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We always adhere to the high quality and service, strive for excellence in raw materials, high precision and advanced equipment, and perfect technology. We can provide all kinds of best quality products according to the different requirements.
specialized in manufacturing of Honed pipe, precision cold drawn teel pipe.

Product Name Cold drawn steel pipe
Material Carbon Steel and Alloy Steel
Surface oiled, Polished, Brightness, Metallic color
Standard ASTM A106 A53 A192 A179 A210 A519
DIN17175 1629 2391
EN10216-1 10216-2 10305-1
and GB,JIS
Grade St35,St45,St52,E215,E235,E355,sch10,sch20,
A106,A179,A192,A210,T11,T22,T12,AISI4130,SAE1010,SAE1020.etc
Technique  Cold drawn & cold rolled
Application 1. Automotive and mechanical pipes
2. Petroleum cracking pipes
3. High Pressure Boiler Pipe
4. Low and middle pressure fluid transportation pipeline
5. Chemical fertilizer equipment pipes
6. Heat exchanger pipes
Delivery 
Conditions
1. BK (+C)  No heat treatment after last cold forming process.
2. BKW (+LC) After last heat treatment there is a light finishing pass (cold drawing)
3. BKS (+SR) After the final cold forming process the tubes are stress relieve annealed.
4. GBK (+A) After the final cold forming process the tubes are annealed in a controlled atmosphere.
5. NBK (+N) After the final cold forming process the tubes are annealed above the upper transformation 
point in a controlled atmosphere. 
Package 1. Bundle Packing.
2. Plain end or vanished as per customer's request.
3. Wrapped in waterproof paper.
4. Sackcloth with several steel strips.
5. Pack in heavy tri-wall boxes.

     

1. Chemical Composition

Steel grade Chemical composition %
C Si Mn P S Cr Ni V AI
C20 0.17-0.24 0.17-0.37 0.15-0.65 0.035 0.025 0.250 0.250 / /
CK45 0.42-0.5 0.17-0.37 0.5-0.8 0.025 0.025 0.250 0.300 / /
Q355B ≤0.2 ≤0.5 1.0-1.6 0.030 0.030 0.030 0.250 0.080 0.015
Q355D ≤0.2 ≤0.5 1.0-1.6 0.030 0.025 0.250 0.250 0.150 /
E355(ST52) ≤0.22 ≤0.55 ≤1.6 0.025 0.025 0.250 0.250 / /
SAE1026 0.22-0.28 0.15-0.35 0.6-0.9 0.040 0.050 / / / /
4130 0.28-0.33 0.15-0.35 0.4-0.6 0.040 0.040 0.80-1.10 / / /
4140 0.36-0.43 0.15-0.35 0.705-1.0 0.040 0.040 0.80-1.10 / / /

 

2.Mechanical Property:

Delivery condition Cold finished(hard)(BK) Cold drawn and stress-relieved(BK+S)
Steel grade Rm MPa Elongation A5% Rm MPa ReH Mpa Elongation A5%
C20 ≥550 ≥5 ≥520 ≥375 ≥15
CK45 ≥645 ≥5 ≥600 ≥520 ≥10
Q355B ≥640 ≥5 ≥600 ≥520 ≥14
Q355D ≥640 ≥5 ≥600 ≥520 ≥14
E355(ST52) ≥640 ≥5 ≥600 ≥520 ≥14
SAE1026 ≥640 ≥5 ≥600 ≥520 ≥15

 

3.Tolerance:

Tolerance I.D Tolerance Tolerance of wall thickness
Size of I.D. H8 H9 H10
30 0.033 0.052 0.084 <120mm(O.D) ±5%
≥120mm up to 210mm ±7.5%
>210mm ±10%
>30-50 0.039 0.062 0.1
>50-80 0.046 0.074 0.12
>80-120 0.054 0.087 0.14
>120-180 0.063 0.1 0.16
>180-250 0.072 0.115 0.185
>250-315 0.081 0.13 0.21
>315-400 0.089 0.14 0.23

 

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Keyword:
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