Square Hollow Section Tubes（Hot Rolled/Cold Rolled）
- Ref Price:
-
- Loading Port:
- China Main Port
- Payment Terms:
- TT or L/C
- Min Order Qty:
- 50MT m.t.
- Supply Capability:
- based on order m.t./month
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Square Hollow Section Tubes（Hot Rolled/Cold Rolled）
Application of Square Hollow Section Tubes（Hot Rolled/Cold Rolled）
It is widely used in building, machine, chemical equipment, automobile industrial, container, it is also applied to agriculture and mine machine.
ASTM A500, GB6728
Steel grade of Square Hollow Section Tubes（Hot Rolled/Cold Rolled）
ASTM A500: A, B, C
GB6728：Q195，Q215，Q235，Q345
Size of Square Hollow Section Tubes（Hot Rolled/Cold Rolled）
*Remark: Besides below sizes, we also can arrange production based on requirement of customers
Sizee(mm) | Thickness(mm) |
20×10 | 0.6-1.0 |
25×12 | 0.6-1.0 |
38×19 | 0.6-1.5 |
50×25 | 0.6-1.5 |
50×30 | 1.6-3.0 |
60×40 | 1.5-3.5 |
75×50 | 1.5-4.0 |
80×40 | 1.5-4.0 |
100×50 | 2.0-6.0 |
100×60 | 2.0-6.0 |
100×75 | 2.0-6.0 |
120×60 | 3.0-6.0 |
120×80 | 3.0-6.0 |
125×50 | 3.0-6.0 |
125×75 | 3.0-6.0 |
150×50 | 3.0-6.0 |
150×75 | 3.0-6.0 |
150×100 | 4.0-12 |
160×80 | 4.0-6.0 |
175×100 | 4.0-12 |
200×100 | 4.0-12 |
200×150 | 4.0-12 |
250×150 | 5.0-12 |
300×200 | 5.0-12 |
400×200 | 5.0-12 |
Chemical Composition(%)
Chemical Requirement | ||||
| Composition % | |||
Grade A | Grade B | |||
Heat | Product | Heat | Product | |
Element | analysis | analysis | analysis | analysis |
Carbon max | 0.26 | 0.3 | 0.22 | 0.26 |
Manganese max | … | … | 1.4 | 1.45 |
Phosphorus, max | 0.035 | 0.045 | 0.03 | 0.04 |
Sulfur max | 0.035 | 0.045 | 0.02 | 0.03 |
Copper, when copper steel is specified, min | 0.20 | 0.18 | 0.2 | 0.18 |
Where an ellipsis (...)appears in this table, there is no requirement | ||||
For each reduction of 0.01 percentage point below the specified maximum for carton, and increase of 0.06 percentage point above the specified maximum for manganese is permitted, up to a maximum of 1.50% by heat analysis and 1.6% by product analysis | ||||
Mechanical Properties
Tensile Requirement | ||
| Grade A | Grade B |
Tensile strength, min, psi (Mpa) | 48000 (400) | 70000 (483) |
Yield strength, min, psi (Mpa) | 36000 (250) | 50000 (345) |
Elongation in 2 in. (50.8mm), min, % | 23 | 23 |
- Q: Are steel pipes affected by UV rays?
- Yes, steel pipes can be affected by UV rays. Prolonged exposure to UV radiation can lead to the degradation of the protective coatings on steel pipes, causing them to corrode and weaken over time. It is important to implement proper protective measures, such as applying UV-resistant coatings or using protective covers, to mitigate the impact of UV rays on steel pipes.
- Q: What is the elasticity of steel pipes?
- Steel pipes exhibit elasticity, which allows them to undergo deformation when external forces are applied and regain their original shape once the force is no longer present. The high elasticity of steel pipes is well-known, as it enables them to endure different types of stress and strain without suffering permanent deformation. This characteristic is vital in situations where pipes experience pressure, bending, or other mechanical forces. The elasticity of steel pipes is determined by material properties like its Young's modulus, which quantifies its stiffness and capacity to resist deformation.
- Q: What are the advantages of using steel pipes in construction projects?
- There are several advantages of using steel pipes in construction projects. Firstly, steel pipes are incredibly strong and durable, making them ideal for carrying heavy loads and withstanding harsh environmental conditions. Secondly, steel pipes have a high resistance to corrosion, which ensures a longer lifespan and reduces maintenance costs. Additionally, steel pipes are lightweight, making them easier to transport and install. Lastly, steel pipes are versatile and can be used for various applications such as water supply, sewage systems, gas pipelines, and structural support.
- Q: Can steel pipes be used for solar power systems?
- Indeed, solar power systems can utilize steel pipes. In the realm of solar power systems, steel pipes find widespread usage in diverse applications such as constructing support structures, mounting systems, and piping systems for circulating heat transfer fluids. The reason behind the preference for steel pipes lies in their robustness, longevity, and ability to withstand various environmental conditions. These pipes possess the capability to bear the weight of solar panels and support structures, as well as endure the impact of wind and other external elements. Moreover, steel pipes can be easily tailored and welded to cater to specific project requirements. All in all, when it comes to solar power systems, steel pipes emerge as a dependable and cost-efficient alternative.
- Q: How do you clean and maintain steel pipes?
- To clean and maintain steel pipes, start by removing any dirt, debris, or rust using a wire brush or sandpaper. Then, wash the pipes with a mild detergent and warm water solution, using a cloth or sponge to scrub away any remaining grime. Rinse thoroughly with clean water and dry the pipes completely to prevent moisture-related issues. To maintain steel pipes, regularly inspect them for signs of corrosion or damage, and apply a protective coating or paint if necessary. Additionally, ensure proper drainage, avoid exposure to harsh chemicals, and promptly address any leaks or repairs needed to extend the lifespan of the pipes.
- Q: Can steel pipes be recycled and used for other purposes?
- Yes, steel pipes can be recycled and used for other purposes. Steel is a highly recyclable material, and steel pipes are no exception. Recycling steel pipes helps to conserve natural resources and reduce the demand for new steel production. When steel pipes are recycled, they are typically sent to a recycling facility where they are sorted, cleaned, and processed. The pipes are then crushed into smaller pieces or melted down to be reshaped into new steel products. Recycled steel pipes can be used for a variety of purposes. They can be used in construction projects, such as for building bridges, roads, or buildings. They can also be used in the manufacturing of new steel products, such as automotive parts, appliances, or furniture. Additionally, recycled steel pipes can be used in the energy sector, for example, in the production of wind turbines or oil and gas pipelines. Using recycled steel pipes not only helps to reduce waste and conserve resources but also has environmental benefits. The recycling process requires less energy and produces fewer greenhouse gas emissions compared to the production of new steel. Therefore, recycling steel pipes is a sustainable option that contributes to a circular economy and helps to protect the environment.
- Q: What's the difference between steel pipe and pipe fittings?
- Pipe classification: steel pipe seamless steel pipe and welded steel pipe (tube) two categories. It can be divided into round tube and special-shaped tube according to the sectional shape. The round steel tube is widely used, but there are some special-shaped steel tubes such as square, rectangle, semicircle, hexagon, equilateral triangle and octagon.
- Q: Is the electric pipe used with steel pipe or PVC pipe?
- Electric pipe laying is generally divided into the following circumstances:1) the explosion-proof area must be galvanized steel pipe and explosion proof flexible pipe (used for front end equipment connection);2) non explosion-proof area can use KBG pipe or PVC tube, the former is higher cost, but the installation is firm, the latter is low cost, easy to construction, and in the rain where it will not rust, but compared to the KBG pipe may be damaged.
- Q: Galvanized steel pipe in addition to good rust resistance, what are the advantages?
- First, the surface of the steel pipe is treated by embroidery, which is more durable, not faster than the rapid oxidation, and will not form white rust on the steel tube;Two. The steel pipe is fully protected. After heating, each part of the steel pipe is plated with zinc, and the concave convex part is protected;
- Q: What is the difference between internal threading and external threading of steel pipes?
- Steel pipes can be threaded using two different methods: internal threading and external threading. The difference between these methods lies in where the threads are created. Internal threading involves cutting threads on the inside surface of the steel pipe. To do this, a tool or die is used to remove material from the inner diameter of the pipe, resulting in a helical groove. These threads are useful for connecting the pipe to other components, such as fittings or valves. On the other hand, external threading involves cutting threads on the outside surface of the steel pipe. This process requires the use of a threading die or a lathe to remove material from the outer diameter, leaving a helical groove. These external threads allow the pipe to be connected to other components or fittings with corresponding internal threads. The choice between internal and external threading depends on the specific application and project requirements. Internal threading is often preferred when the pipe needs to be connected to components with external threads, like fittings or valves. External threading, on the other hand, is typically used when the pipe needs to be connected to components with internal threads, or when it needs to be screwed into a threaded hole or coupling. In conclusion, the primary difference between internal and external threading of steel pipes is the location of the threads – internal threads are cut on the inside surface, while external threads are cut on the outside surface. The choice between these methods depends on the specific application and the type of connections needed.
We mainly produces Square and Rectangular Tubes which using the cold rolling technology and other types of tube including Round Steel Pipes, Welded Steel Pipes, Seamless Steel Pipes, Long Products, Flat Steel Products and so on. Our productivity achieves 500, 000 tons each year.
Our company is stronger in financial capital and enough power of technical support. The steel tubes made by the company are strictly according to ISO9001:2000 standard quality management system to ensure the high quality of the products.
1. Manufacturer Overview
| Location | Tianjin,China |
| Year Established | 2000 |
| Annual Output Value | Above Thirty Million RMB |
| Main Markets | China; Europe |
| Company Certifications | ISO9001:2000 |
2. Manufacturer Certificates
| a) Certification Name | |
| Range | |
| Reference | |
| Validity Period |
3. Manufacturer Capability
| a) Trade Capacity | |
| Nearest Port | Tianjin；Qingdao |
| Export Percentage | 41% - 50% |
| No.of Employees in Trade Department | |
| Language Spoken: | English；Chinese |
| b) Factory Information | |
| Factory Size: | 53000square meter |
| No. of Production Lines | |
| Contract Manufacturing | OEM Service Offered；Design Service Offered |
| Product Price Range | Low Average |
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Square Hollow Section Tubes（Hot Rolled/Cold Rolled）
- Ref Price:
-
- Loading Port:
- China Main Port
- Payment Terms:
- TT or L/C
- Min Order Qty:
- 50MT m.t.
- Supply Capability:
- based on order m.t./month
OKorder Service Pledge
Quality Product, Order Online Tracking, Timely Delivery
OKorder Financial Service
Credit Rating, Credit Services, Credit Purchasing
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