High Quality Hollow Section-Square Tubes

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Loading Port:
China main port
Payment Terms:
TT or L/C
Min Order Qty:
5 m.t.
Supply Capability:
1000 m.t./month
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High Quality Hollow Section-Square Tubes

 

 

Product Applications:

It is widely used in building, machine, chemical equipment, automobile industrial, container, it is also applied to agriculture and mine machine.

 

Product Specifications:

Standards: ASTM A500, GB6728

Grade: ASTM A500: A, B, C; GB6728: Q195, Q215, Q235, Q345

  

Sizes:

*Remark: Besides below sizes, we also can arrange production based on requirement of customers

Size (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

0.2

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

 

GB6728:

Steel Grade

CHEMICAL COMPOSITION

MECHANICAL PROPERTIES

C (%)

Si (%)

Mn

(%)

P (%)

Max

S (%)

Max

YS (Mpa)

Min

TS (Mpa)

Min

El (%)

Min

Q195

0.06-0.012

0.3

0.25-0.5

0.45

0.5

195

315

22

Q215

0.09-0.15

0.3

0.25-0.55

0.45

0.5

215

335

22

Q235

0.12-0.22

0.3

0.3-0.7

0.45

0.45

235

375

20

Q345

0.20

0.55

1.0-1.6

0.45

0.45

345

510

21

Packaging: Packed in bundles, each bundle with 6-8 steel stripes and 2 nylon strips or one by one Or Nested into Containers

 

Product Images:

 

producing of Hollow Section-Square Tubes

 

 

Hollow Section-Square Tubes

 

 

High Quality Hollow Section-Square Tubes

 

 

High Quality Hollow Section-Square Tubes

 

FAQ:

Q1: Why buy Materials & Equipment from OKorder.com?

A1: All products offered byOKorder.com are carefully selected from China's most reliable manufacturing enterprises. Through its ISO certifications, OKorder.com adheres to the highest standards and a commitment to supply chain safety and customer satisfaction.

 

Q2: How do we guarantee the quality of our products?

A2: We have established an advanced quality management system which conducts strict quality tests at every step, from raw materials to the final product. At the same time, we provide extensive follow-up service assurances as required.

 

Q3: How soon can we receive the product after purchase?

A3: Within three days of placing an order, we will begin production. The specific shipping date is dependent upon international and government factors, but is typically 7 to 10 workdays.

 

Q4: What makes stainless steel stainless?

A4: Stainless steel must contain at least 10.5 % chromium. It is this element that reacts with the oxygen in the air to form a complex chrome-oxide surface layer that is invisible but strong enough to prevent further oxygen from "staining" (rusting) the surface. Higher levels of chromium and the addition of other alloying elements such as nickel and molybdenum enhance this surface layer and improve the corrosion resistance of the stainless material.

 

Q5: Can stainless steel rust?

A5: Stainless does not "rust" as you think of regular steel rusting with a red oxide on the surface that flakes off. If you see red rust it is probably due to some iron particles that have contaminated the surface of the stainless steel and it is these iron particles that are rusting. Look at the source of the rusting and see if you can remove it from the surface.

 

Q6: What is the difference between galvanized steel and galvalume steel?

A6: Galvanized steel is metallic coated with Zinc in various coating weights. Minimum recommended for painted metal roofs is G90. Galvalume is a zinc and aluminum coated steel that becomes an alloy and is recommended in either painted or bare applications with a minimum coating weight of AZ50. Galvalume has an excellent performance life in bare exposures. Hence if you are using a bare panel use galvalume and if painted use either.

 

Q7: Is there a difference in thermal conductivity between stainless steel and steel?

A6: Yes. Stainless Steel has a lower thermal conductivity rate than steel; approximately 1/3 to 1/5th depending on the material.

 

Q8: Is there a difference in electrical conductivity between stainless steel and steel?

A8: Yes. Steel is generally more conductive than stainless steel. Steel has resistivity in the range of 10~20Ωm, while stainless has a resistivity of approximately 60~72Ωm.

 

Q:
Steel pipes can be protected from corrosion through various methods such as applying protective coatings, using cathodic protection techniques, implementing proper maintenance and inspection procedures, controlling water chemistry, and utilizing corrosion inhibitors.
Q:
Some of the non-destructive testing methods used for steel pipes include ultrasonic testing, magnetic particle testing, eddy current testing, radiographic testing, and visual inspection.
Q:What's the difference between the fastener type steel pipe scaffold, the floor type steel pipe scaffold and the overhanging type steel pipe scaffold?
Butt fastener: used for connecting two steel pipe joints.The base and the pad: is set up in the bottom of the pedestal pole, pay attention to the distinction between base and the base plate, usually with steel plate and welded steel pipe, base usually put on a backing plate, and the plate can be wood can also be plate.The foot board (see the diagram below), safety net (no explanation, this is very simple).
Q:
Yes, steel pipes are suitable for structural applications. Steel pipes are known for their strength, durability, and versatility, making them ideal for various structural applications. They can be used in buildings, bridges, stadiums, and other structures to provide support and stability. Steel pipes have high tensile strength, which allows them to withstand heavy loads and resist deformation under pressure. Additionally, their resistance to corrosion makes them a reliable choice for structural applications, even in harsh environments. The use of steel pipes in structural applications is further enhanced by their cost-effectiveness and easy installation. Overall, steel pipes are a popular choice in the construction industry due to their strength, durability, versatility, and cost-effectiveness.
Q:
There are several advantages of using stainless steel pipes. Firstly, stainless steel pipes have excellent corrosion resistance, making them suitable for various industries, including water supply, chemical processing, and oil and gas. Secondly, they have high strength and durability, allowing them to withstand extreme temperatures and pressure. Additionally, stainless steel pipes are hygienic and easy to clean, making them ideal for applications in the food and beverage industry. Lastly, they have a long lifespan and require minimal maintenance, resulting in cost savings in the long run.
Q:
The construction of bridges and tunnels heavily relies on steel pipes, which are widely used for various purposes due to their strength, durability, and versatility. When it comes to bridge construction, steel pipes are commonly utilized to fabricate the structural framework of the bridge. They act as the primary load-bearing members, providing support and stability to the entire structure. Steel pipes are particularly favored in bridge construction because of their high tensile strength, enabling them to withstand heavy loads, including the weight of vehicles and the dynamic forces generated by traffic. Steel pipes are also essential in the construction of bridge piers and abutments, which serve as the foundation and support for the bridge structure. To create sturdy foundations that can withstand the forces exerted by the bridge's weight and external factors such as wind, water currents, and seismic activity, steel pipes are often driven deep into the ground. Similarly, in tunnel construction, steel pipes play a critical role. They are extensively used for tunnel lining, which involves the installation of structural elements along the tunnel walls and roof to ensure stability and prevent soil or rock collapse. Steel pipes are commonly used as reinforcement elements, ensuring the structural integrity of the tunnel and protecting it from external pressures. Furthermore, steel pipes are utilized for underground utility systems in both bridges and tunnels. They act as conduits for various utilities, including water supply, electrical cables, gas pipelines, and communication lines. Steel pipes are ideal for these applications because of their corrosion resistance, ability to withstand high pressures, and long lifespan. In conclusion, steel pipes are crucial in the construction of bridges and tunnels as they provide strength, stability, and durability to these structures. They play a vital role in ensuring the safety and functionality of these critical infrastructure projects, allowing for efficient transportation and the seamless provision of utilities.
Q:
There are several different types of steel pipe fittings for plumbing systems, including elbows, tees, couplings, unions, reducers, and flanges.
Q:How can the immersed pipe pile put steel cage into the steel pipe? Which expert to answer?
Immersed tube cast-in-place pile is one of the many types of pile foundations in civil engineering. The immersed tube cast-in-place pile is also called the cast-in-place pile. It is the use of piling equipment, with reinforced concrete pile boots (valve type steel pipe pile shoe) into the soil, pile hole, and then put into the steel skeleton and concrete pouring, then pull out the casing, using vibration extubation of concrete compaction, forming pile needed. Using hammer sinking pile equipment, sinking pipe and pulling pipe pile is called hammer sinking pipe filling pile. It is called vibro sinking pipe cast-in-place pile by vibrator, vibration sinking pipe and pipe pulling pile. In order to improve the quality and carrying capacity of piles, the construction techniques of single shot, double play and reverse insertion are often used in immersed tube cast-in-place piles. Single game (also called a extubation): extubation, every increase of 0.5 ~ 1.0m, 5 ~ 10s vibration, then extubation in 0.5 ~ 1.0m, this is repeated until all pull out; complex play: two singles were continuously in the same pile hole, or according to the needs of the local retapping. Construction, should ensure that two times before and after the immersed tube axis coincide, and in the concrete before the initial coagulation; inverted plug method: steel pipe lifting 0.5m, and then plug 0.3m, so repeated until the pull out.
Q:Difference between cold rolled steel pipe and common steel pipe
From the above point of view, the hot rolled steel pipe used in fluid transport, mechanical structure and other requirements of the size of the situation is not high, cold-rolled steel pipe used in precision instruments, hydraulic systems, pneumatic and other places demanding.
Q:What is the outer diameter of the steel tube?
The outer diameter refers to the maximum diameter including the thickness of the steel tube, the inner diameter is the length of the hollow part inside, and the outer diameter minus the inside diameter is the thickness of the steel pipe
The company has successively passed ISO9000 quality system, the American Petroleum Institute API, and also earned the environment healthy license, national special equipment manufacturing license.

1. Manufacturer Overview

Location Hebei, China
Year Established 1988
Annual Output Value Above One Hundred Million RMB
Main Markets Main land; Southeast Asia; Middle East; Africa
Company Certifications ISO 9002:2010;API 5L

2. Manufacturer Certificates

a) Certification Name  
Range  
Reference  
Validity Period  

3. Manufacturer Capability

a)Trade Capacity  
Nearest Port Tianjin
Export Percentage 30%-50%
No.of Employees in Trade Department 201-500 People
Language Spoken: English; Chinese
b)Factory Information  
Factory Size: 50,000 square meters
No. of Production Lines Above 15
Contract Manufacturing Meicai Metal Trading Co.Ltd
Product Price Range Average

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