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: What's the material of Q325 steel pipe?
- Plain carbon structural steelIt's a kind of steel material. Q stands for the yield of this material, and the latter 325 means the yield value of this material, at around 325. And the yield value will decrease as the thickness of the material increases.
- Q: How do steel pipes handle thermal expansion and contraction?
- Steel pipes are able to handle thermal expansion and contraction due to their unique properties and design. When exposed to high temperatures, steel pipes expand as the molecules within the material gain energy and move more vigorously. Conversely, when exposed to low temperatures, steel pipes contract as the molecules lose energy and move less vigorously. To accommodate these changes, steel pipes are manufactured with certain features. One such feature is the allowance of clearance between pipe joints. This clearance allows for expansion and contraction without causing stress or deformation in the pipe. Additionally, the use of expansion joints or flexible connectors within the piping system helps to absorb the thermal movements and prevent damage. Furthermore, steel pipes are often installed with proper anchoring and support systems. These systems are designed to allow the pipes to freely expand and contract within a certain range without causing excessive stress or strain on the structure or surrounding components. Anchoring and support systems also help to maintain the overall stability and integrity of the piping system. In some cases, thermal insulation materials are applied to steel pipes to minimize temperature changes and reduce the effects of expansion and contraction. These insulating materials help to maintain a more consistent temperature within the pipe, reducing the magnitude of thermal movements. Overall, steel pipes are well-suited to handle thermal expansion and contraction due to their inherent strength and flexibility. With proper design, installation, and maintenance, steel pipes can effectively accommodate temperature changes without compromising their structural integrity or functionality.
- Q: Seamless steel tube DN15 specification phi 18*3 what do you mean?
- Seamless steel pipe DN15 specification phi 18*3 refers to 3 outer diameter of 18mm B type DN15 seamless steel tube.
- Q: How to perform nondestructive inspection of steel tubes
- Radiographic inspection (RT)One of the earliest nondestructive testing methods is widely used in the inspection of internal defects of metals and non-metallic materials and products, with a history of at least 50 years. It has incomparable unique advantages, that is to test the correctness, reliability and intuition of the defects, and the ray film can be used for the analysis of defects and as a quality certificate archive. But this method also has the disadvantages of more complicated equipment and higher cost, and should pay attention to the protection of radiation.
- Q: Are steel pipes suitable for structural applications?
- Yes, steel pipes are suitable for structural applications due to their high strength, durability, and versatility. They are commonly used in various construction projects such as buildings, bridges, and infrastructure due to their ability to bear heavy loads, resist corrosion, and withstand extreme weather conditions.
- Q: What is the fatigue strength of steel pipes?
- The fatigue strength of steel pipes refers to their ability to withstand repeated cyclic loading without experiencing failure. It is a critical characteristic for pipes that are subject to dynamic or fluctuating loads, such as those used in the oil and gas industry, transportation infrastructure, or industrial applications. The fatigue strength of steel pipes can vary depending on several factors, including the steel grade, pipe dimensions, manufacturing process, surface conditions, and environmental factors. Steel pipes with higher tensile strength and toughness generally exhibit better fatigue resistance. The fatigue strength is typically determined through fatigue testing, which involves subjecting the pipes to cyclic loading until failure occurs. The results are then used to establish a fatigue curve or S-N curve, which represents the relationship between the applied stress amplitude and the number of cycles to failure. The fatigue strength is commonly expressed as the stress amplitude required to cause failure after a specific number of cycles, such as the stress amplitude at 10 million cycles (S-N10^7). It is important to note that fatigue strength is influenced by other factors, such as mean stress, surface finish, and loading frequency, which may need to be considered in specific applications. Overall, the fatigue strength of steel pipes is a crucial factor to consider in engineering design and maintenance, as it helps ensure the long-term integrity and reliability of the pipes under cyclic loading conditions.
- Q: What's the difference between stainless steel seamless tube and stainless steel welded pipe?
- Stainless steel welded pipe is also a hollow section of steel, but it is welded through the plate into the steel pipe, so there is a welded steel pipe welding gap.
- Q: Are steel pipes suitable for use in pharmaceutical industries?
- Yes, steel pipes are suitable for use in pharmaceutical industries. Steel pipes are known for their durability, strength, and resistance to corrosion. These qualities make them ideal for transporting chemicals, gases, and liquids safely and efficiently within pharmaceutical facilities. Additionally, steel pipes can be easily cleaned and sanitized, ensuring the maintenance of high hygienic standards required in the pharmaceutical industry.
- Q: How are steel pipes used in bridge construction?
- Steel pipes are commonly used in bridge construction for various purposes. They are often used as piles to provide structural support to the bridge foundation, ensuring stability against soil movement and water pressure. Additionally, steel pipes are used as structural components in the bridge's superstructure, such as for trusses and beams, due to their high strength and durability. Steel pipes also play a crucial role in carrying utilities, such as water and gas pipelines, across the bridge. Overall, steel pipes are an essential element in bridge construction, providing strength, stability, and functionality to the structure.
- Q: What is the lifespan of galvanized steel pipes?
- The lifespan of galvanized steel pipes can vary depending on several factors such as the quality of the galvanizing process, the environment in which they are installed, and how well they are maintained. However, on average, galvanized steel pipes can last between 40 to 70 years before they may start to show signs of corrosion or degradation.
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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