Steel Pipe
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.
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 |
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Grade | St35,St45,St52,E215,E235,E355,sch10,sch20, A106,A179,A192,A210,T11,T22,T12,AISI4130,SAE1010,SAE1020.etc |
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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. |
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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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