High Quality Hollow Section-Square Tubes

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China main port
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TT or L/C
Min Order Qty:
5 m.t.
Supply Capability:
1000 m.t./month

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Product Description:

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.

 

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Q:What material is RHS in the steel tube?
The CHS structure represents thin-walled round steel tubes, in which materials are referred to Taiwan CHS's steel and are used to indicate the series of anti rust paints used in metal materials.
Q:What's the material of Q325 steel pipe?
In terms of deoxidation methods, F, B, Z can be expressed as boiling steel, flat killed steel, killed steel and boiling steel. They are deoxidized steel, which is of poor plasticity and toughness. Welded joints made of this material are susceptible to cracks when subjected to dynamic loads. Should not work at low temperatures, sometimes hardening. In contrast, calming steel is excellent and uniform, with good plasticity and toughness.
Q:What is lined pipe?
There are inner pipe jacket, such as day, tube, etc.; there are outside the pipe painted, such as large-diameter water pipes. An internally coated steel pipe for corrosive medium fluids replaces the expensive stainless steel pipe.
Q:What type of steel pipe dance is used in general?
According to international competition practice, the standard size of steel tube is 40 mm or 45 mm in diameter, and the 45mm is usually used. The height of the steel pipe is not less than 3.3 meters and not higher than 4 meters.
Q:What are the uses of seamless steel tubes?
A large number of pipes used for conveying fluids, such as pipelines for transporting petroleum, natural gas, gas, water, and certain solid materials.
Q:How to descaling galvanized steel pipe?
Is red rust or white rust, red rust is the base material rust, white rust is Zinc Coating Rust
Q:Theoretical weight of 25*25*1.5 square steel tubes
The theoretical weight of 25*25*1.5 square steel tubes is 1.075kg/m.
Q:What is the difference between steel pipe and round steel?
Widely used in the manufacture of structural and mechanical parts, such as oil drilling pipe, automobile transmission shaft, bicycle frame and steel scaffolding used in construction. Making ring parts with steel tubes can improve data application rate, simplify manufacturing process, save data and work hours, such as rolling bearings, rings, Jack sleeves, etc., and have been widely used in steel pipe manufacture.
Q:Can stainless steel pipes spray black paint?
Stainless steel pipes can spray black paint.The stainless steel surface with a layer of smooth surface, so the painting before the need to use corner grinder or iron brush to paint out into hair and then paint. Otherwise, spray paint can not be adhered to the surface of the stainless steel pipe.
Q:20# seamless steel pipe and seamless steel pipe 20G what is the difference?
20G seamless steel tube is a high-pressure boiler tube. In addition to carbon content, 20G seamless steel tubes also have some trace elements that are more suitable for use as boiler pressure vessels. In addition, 20G also focuses on its physical performance. Such as bending, impact and tensile properties. 0G seamless steel tube is a kind of steel strip with hollow section and without seams. A steel pipe having a hollow cross section, used as a conduit for conveying fluids, such as pipelines for transporting petroleum, natural gas, gas, water, and certain solid materials.
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