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Cross-Section Square Steel Tube
1.Company Introduction
Jinan Xin Jiyuan Special Section Co.,LTD locates in Jinan where is the capital of Shan Dong province. Our company established in 1997. We have 16 years’ experience in producing square pipe and rectangular pipe. Our production lines can manufacture all sizes of pipes according customers’ requirements.
2. Technical requirements:
1). Chemical Composition:
Yield Strength Grade |
Demotic Raw-material Grade |
235 |
Q235B, Q235C, Q235D, Q235qC, Q235qD |
345 |
Q345A, Q345B,Q345C,Q345D,Q345Qc, Q345Qd, StE355, B480GNQR |
Carbon Equivalent
Ceq(%)=C+Mn/6+Si/24 +Ni/40+Cr/5+Mo/4+V/14
Ⅰgrade product Ceq(%)
Yield Strength Grade |
235 |
345 |
390 |
Ceq(%) |
≤0.36 |
≤0.43 |
≤0.45 |
Note: In order to improve the performance of steel,390 could add the microelement such as V, Nb, Ti, Mo and N etc. | |||
2). Mechanical Property:
Yield Strength Grade |
W.T (mm) |
Yield Strength (Mpa) |
Tensile Strength (Mpa) |
Elongation (%) |
(20°C) Impact Value J |
235 |
4~12>12~22 |
≥235 |
≥375 |
≥23 |
≥27 |
345 |
4~12>12~22 |
≥345 |
≥470 |
≥21 |
≥27 |
390 |
4~12>12~22 |
≥390 |
≥490 |
≥19 |
≥27 |
3). ⅠGrade Product Yield Strength:
Yield Strength Grade |
Outside perimeter (mm) |
Wall Thickness (mm) |
Yield Strength % |
|
Directly to Square |
Round to Square |
|||
235 |
≥800 |
12~22 |
≤80 |
≤90 |
345 | ||||
390 |
≤85 |
≤90 |
||
Note: when the outer perimeter less than 800mm,can be determined by supply and buyer | ||||
3. Manufacturing Process:
1).Directly into Square: make continuous angle deformation of cold-rolled or hot-rolled steel plate directly, and then by high frequency welding form a rectangular steel tube forming method. Also known as square-square method.
2). Round to square: make continuous angle deformation of cold-rolled or hot-rolled steel plate directly, and then by high frequency welding form a round steel tube forming method, though the reshaping finally form a rectangular steel tube forming method. Also known as round to square method.
4.Why choose our company?
1.High quality pipe with reasonable price.
2.Advanced test equipments and professional inspection measures to guarantee our quality.
3.Our products are widely used in construction, water supply and other fields.
4.The after-sale service is good, customers can buy our products without any worries.
5.We can produce different kinds of pipes according to customers’ requirements.
6.We have exported our products to many foreign countries. Our products are popular among these countries.
7.Professional staff can save your time and money
5.
|
Shape
|
Rectangular:20*30-600*800mm |
Square:20*20-600*600 mm | |
Thickness |
1.0-35 mm |
Standard |
GB/T3094-2000 GB/T6728-2002 ASTM A500 JIS G 3466 DIN EN 10210 or according to customers’ requirement. |
Material |
Q195,Q235,Q275,Q345 20#,45# S235,S355 St33,St37,St52 A500,A513,A106 SS400 and so on. |
Technique |
Hot Rolled, Cold Rolled, ERW, High-frequency welded, Extruded |
Certification |
ISO9001,CE |
Surface |
Bared, Oil, Galvanized, Paint |
Length |
6m, 12m, or according to customers’ requirements |
Usage |
Machinery manufacture, Roads and Bridges, Construction, Transportation |
Port of Shipment |
QingDao, China |
Main Market |
America Asia Africa Oceania Mid East |
Productivity |
150000TONS/YEAR |
|
In order to make best quotation, Please kindly indicate length, width, thickness and the standard, material you required. | |
|
Your success is our business
| |
6.Professional Inspection
7.Delivery
8.Certification
Feel free to contact me if you have any questions.
Thank you for browsing our products.
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