TORICH INTERNATIONAL LIMITED
| Payment Terms | L/C, D/A, D/P, T/T, Western Union, MoneyGram |
| Supply Ability | 5000Tons per Year |
| Delivery Time | 4-8weeks |
| Packaging Details | plastic box packaging |
| Technique | Cold Drawn,Hot Rolled,Cold Rolled |
| Application | Precision Application |
| Standard | GB |
| Alloy or not | Non-alloy,Is Alloy |
| Section shape | Round,rectangular/ square/ round |
| Surface treatment | customerized |
| Grade group | 10#-45# |
| Special pipe | precision seamless pipe |
| Secondary or not | Non-secondary |
| Product name | Seamless Steel Pipe |
| Shape | Round/Square/Rectangular |
| Type | Seamless |
| Brand Name | TORICH |
| Model Number | GB/T 3639 |
| Certification | ISO9001 ISO14001 TS16949 |
| Place of Origin | ZheJiang/China |
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Product Specification
| Payment Terms | L/C, D/A, D/P, T/T, Western Union, MoneyGram | Supply Ability | 5000Tons per Year |
| Delivery Time | 4-8weeks | Packaging Details | plastic box packaging |
| Technique | Cold Drawn,Hot Rolled,Cold Rolled | Application | Precision Application |
| Standard | GB | Alloy or not | Non-alloy,Is Alloy |
| Section shape | Round,rectangular/ square/ round | Surface treatment | customerized |
| Grade group | 10#-45# | Special pipe | precision seamless pipe |
| Secondary or not | Non-secondary | Product name | Seamless Steel Pipe |
| Shape | Round/Square/Rectangular | Type | Seamless |
| Brand Name | TORICH | Model Number | GB/T 3639 |
| Certification | ISO9001 ISO14001 TS16949 | Place of Origin | ZheJiang/China |
Precision seamless steel pipes are essential components in various industries that require high precision and accuracy in their applications. These pipes are manufactured using a cold rolling process, ensuring excellent dimensional accuracy and surface finish. GB/T 3639 is the Chinese national standard that specifies the requirements for precision seamless steel pipes. In this article, we will explore the key features, material specifications, chemical composition, mechanical properties, steel grades, applications, and possible alternative grades of GB/T 3639 10#, 20#, 35#, and 45# precision seamless steel pipes.
GB/T 3639 precision seamless steel pipes are made from carbon steel and are available in four different grades: 10#, 20#, 35#, and 45#. These pipes are produced through a cold rolling process, which involves passing the steel billet through a series of rollers at room temperature to achieve the desired dimensions and surface finish.
The standard specifies the following dimensions for GB/T 3639 precision seamless steel pipes:
Precision seamless steel pipes manufactured according to GB/T 3639 exhibit several key features that make them suitable for precision applications:
The chemical composition of GB/T 3639 precision seamless steel pipes is as follows:
| Steel Grade | Chemical Composition (%) |
|---|---|
| 10# | C: 0.07-0.14, Si: 0.17-0.37, Mn: 0.35-0.65, P: ≤0.035, S: ≤0.035 |
| 20# | C: 0.17-0.24, Si: 0.17-0.37, Mn: 0.35-0.65, P: ≤0.035, S: ≤0.035 |
| 35# | C: 0.32-0.39, Si: 0.17-0.37, Mn: 0.50-0.80, P: ≤0.035, S: ≤0.035 |
| 45# | C: 0.42-0.50, Si: 0.17-0.37, Mn: 0.50-0.80, P: ≤0.035, S: ≤0.035 |
The mechanical properties of GB/T 3639 precision seamless steel pipes are as follows:
| Steel Grade | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) |
|---|---|---|---|
| 10# | ≥335 | ≥205 | ≥24 |
| 20# | ≥410 | ≥245 | ≥20 |
| 35# | ≥510 | ≥305 | ≥17 |
| 45# | ≥590 | ≥335 | ≥14 |
The different steel grades of GB/T 3639 precision seamless steel pipes have specific applications based on their mechanical properties and chemical composition. Here are the steel grades and their corresponding applications:
While GB/T 3639 precision seamless steel pipes are widely used, there are alternative grades available in other international standards. Some possible alternative grades include:
Haiyan Sanxin Steel Pipe Factory is a leading manufacturer of steel pipes in China. Located in a region with excellent geographical advantages, the factory is situated close to the Zhoushan Port and Ningbo Port.
Our factory covers an area of more than 25,000 square meters and has been in the steel pipe manufacturing business for 20 years. Over this period, we have accumulated a wealth of professional experience, which has helped us establish ourselves as a trusted name in the industry.
At our factory, we specialize in the production of various types of steel pipes, including stainless steel pipe, carbon steel pipe, copper pipe, steel pipe,seamless steel pipe and welded pipe. Our expertise in this field is evident from the 12 patents that we hold, which demonstrate our commitment to innovation and excellence.
A: manufacturer,also can do trading.
A: Generally speaking,it is 10-15 days if the goods are in stock,or it is 30-40 days if the goods are not in stock, it is according to quantity.
A: Yes, we could offer the sample for free charge but need pay the cost of freight.
A: Payment<=2000USD, 100% in advance. Payment>=2000USD, 30% T/T in advance ,balance before shippment.
If you have another question, pls feel free to contact with me.
Company Details
Business Type:
Manufacturer,Distributor/Wholesaler,Exporter,Trading Company,Seller
Year Established:
1997
Total Annual:
10million-15million
Employee Number:
100~150
Ecer Certification：
Verified Supplier
Who We are ？ TORICH is an enterprise that has been producing precision steel pipes and steel pipe processing for over 20 years, with a factory area of approximately 20000 square meters The main products produced are carbon steel and alloy steel grade seamless steel pipes, we... Who We are ？ TORICH is an enterprise that has been producing precision steel pipes and steel pipe processing for over 20 years, with a factory area of approximately 20000 square meters The main products produced are carbon steel and alloy steel grade seamless steel pipes, we...
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