Product Details

Square Tubing

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. In order to expand our company, we invest RMB 16 million to build our new factory in 2011. 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

Products Information

Shape	Rectangular Tube:2030-600800mm
Shape	Square Tube:2020-600600 mm
Thickness	1.0-35 mm
Material	1.GB/T3094-2000 GB/T6728-2002 Q195,Q235,Q275,Q345,20#,45# 2.EN 10210,EN10219 S235,S355 3.DIN17100 St33,St37,St52 4.JIS G3466 SS330,SS400,STK490 5.ASTM A500,A513,A106 GR.A,GR.B,GR.C,GR.D or according to clients requirements.
Surface	Bared, Oil, Galvanized, Paint
Length	6m, 12m, or according to customers’ requirements
Port of Shipment	QingDao, Tianjin
Test Certification	1.Chemical Component Analysis (C,Si,Mn,S,P) 2.Mechanical Properties (Tensile Strength, Yield Strength, Elongation ) MTC is supplied.
Test Certification	Third party inspection: BV,SGS
Productivity	150000TONS/YEAR
In order to make best quotation, Please kindly indicate length, width, thickness and the standard, material you required.

Techniacal Process

The technical process of our company reached international leading level.Our process is used

advanced machine to extruded round tube to square and rectangular tube.

Advantages of square and rectangular tube

1.Stress of R angle release completely and equally,our products are of high quality.

2.The sizes are of more precisely.

3.There is little distortion and deformation.

4.Production could adjust,the MOQ is 2 pieces.

The yield strength is higher.

Part of Warehouse

We have two big warehouse to guarantee stock of steel pipe.

Contact Information

Feel free to contact me if you have any questions.

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