SS400 ERW Square/Rectangular Steel Tube/Hollow Section

Product Description

We specialized in manufacturing the full size of square tubes and rectangular tubes:20X20-600X600mm,square tubes,20X30-600X800mm rectangular tubes,for more than 20 years since 1997.

  SS400 ERW Square/Rectangular Steel Tube/Hollow Section Product Description:

commodity	SS400 ERW Square/Rectangular Steel Tube/Hollow Section
O.D	20*20-600*600mm/20*30-600*800mm
W.T	1.0-35.0mm
length	3-12m or according to per request
material	Q195-Grade B, SS330, SPC, S185 Q215-Grade C,CS Type B, SS330, SPHC Q235---Grade D, SS400, S235JR, S235JO, S235J2 Q345---SS500, ST52, ST37 10#,20#,45#, etc
Surface treatment	1, Oiled 2, Galvanized 3, Painting black 4, According to the customers` requirement
Test	1.Chemical Component Analysis (C,Si,Mn,S,P) 2.Mechanical Properties (Tensile Strength, Yield Strength, Elongation ) MTC is supplied. 3.Third party inspection: BV,SGS
Package	1, Big OD: in bulk 2, Small OD: packed by steel strips 3, Plastic bags 4, According to customer`s requirements
Delivery	Normally 10-20 days after get deposits or according to quantity
Advantage	1.large inventory 2.high quality,low price 3.good after-sales service 4.short delivery time

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

I grade 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.

Mechanical Property: 

Yield Strength Grade	W.T	Yield Strength	Tensile Strength (Mpa)	Elongation	(20°C) Impact Value J
	(mm)	(Mpa)		(%)
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

Surface Qualty:

1.Cold bending section steel surface can not have bubbles,cracks,inclusions and transverse stratification,wrinkle,buckle and so on. Allow slight pit,convex,indentation,scratch and presure into the iron oxide,but is not greater than 10% of nominal wall thickness.

2.Surface defects allowed use grinding method to clear up,but after cleaning the thickness should be no less than minimum allowable thickness.

3.If have special requriements on surface quality of cold bending section steel ,determined by supply and demand.

Welding Quality:

1.Welds of cold bending section steel shall not be skip welding,lap welding and burn through.

2.Weld flaw allowed repair welding and grinding,but  after welding and griding shold reach requirements specified in this standard.

3. Burrs around welding should be removed, burrs inside seams do not clear up,when have special request determined by supply and demand.

  SS400 ERW Square/Rectangular Steel Tube/Hollow Section Product Photo Show:

Certifications

Application

  SS400 ERW Square/Rectangular Steel Tube/Hollow Section Product Application:

Packaging & Shipping

Packaging:

Shipping:

Company Information

Company Introduction :

Our company focuses on the usage, development and research of square and rectangular tubes over the passed 20 years. We purchased three production lines at the cost of over 16 million for expansion of the new factory in 2012, These production lines make full-sizes of square tubes and rectangular tubes: 20x20mm-600x600mm, 20x30mm-600x800mm, Thickness:1.0mm-35.0mm,over 2800 kinds of specifications.

Executive standard	GB/T912-1989	EN10025-1993	DIN17100-80	ASTM-A106/A500	JISG3466
	GB/T3274-1988	EUROPE	GERMANY	USA	JAPAN
	CHINA
Steel grade	Q195 Q215A Q215B	S185	St33		SS330
	Q235B	S235JR	St37-2	GR.A	SS400
	Q235C	S235JO	St37-3
	Q345B	S355JRH	St52-2	GR.B	STK 490
	Q345C Q390B Q390C	S355JOH	St52-3	GR.C
	Q345D	S355J2H		GR.D
	Q345E
	20#			GR.B
	45#,20Mn2,27SiMn
OD range	20mmX20mm-600X600mm
	20mmX30mm-600X800mm
Wall Thickness	1.0mm-35.0mm

      

Our Services

Our company have passed ISO9001:2008 quality management system certification and have passed Europe Union EN10210-1:2006 ,10219-1:2006 CE certification in 2012. Company resorts more variety,large inventory,high quality,loe price,short delivery time,good after-sales service and many other competitive advantages,to become designated supplier of many large enterprises.Customers throughout our country in more than 20 provinces and cities and exported to the United States,Canada,Russia, India,Malaysia,Europe and other countries and regions.

FAQ

How to contact me?

Email: steelpipeexport (at)yahoo.com

WhatsApp:18905315739

Wechat:554717325

QQ:554717325