Product Detail
| Products | Square bar | 
| Dia | 5mm~250mm | 
| Length | 3m,6m,9m,12m or as customer's actual reques | 
| Tolerance | +0.5mm/-0(dia),+5mm/-0(L) | 
| Standard | ASTM A 615 Gr 40/60,BSS4449 Gr460B,500B etc | 
| Material | Q195,Q235,Q345,SAE1010,SAE1020,SAE1045,EN8,EN19,C45,CK45,SS400 etc. | 
| Surface | ASTM,AISI,JIS,GB, DIN,EN | 
| Technique | Hot rolled / cold rolled | 
| Surface | Black Finish ,Oiled,Shot Blasted,Spray Paint,Coated,Galvanized,Or as Your Request | 
| Package | In bundle, no other package or wrapped with waterproof, or as customers' requirement | 
| Product Application | 1. Pole, viaduct pier, railway sleeper | 
| 2. For both indoor and outdoor the building construction | 
| Origin | Tianjin China | 
| Certificates | ISO9001-2008,SGS.BV,TUV | 
| Delivery Time | Usually within 10-45 days after receipt of advance payment | 
Main Application
1.Fluid / Gas delivery, Steel structure, Construction;
2.ROYAL GROUP ERW/Welded round carbon steel pipes, which with Highest quality and strong supply ability are widely used in Steel structure and Construction.
Note: 
1.Free sampling, 100% after-sales quality assurance, Support any payment method;
2.All other specifications of round carbon steel pipes are available according to your requirement (OEM&ODM)! Factory price you will get from ROYAL GROUP.
Size Chart
Process of production
Hot rolled square steel process: billet → heating → piercing → three roll cross rolling, continuous rolling or extrusion → de rolling → sizing → cooling → straightening → hydrostatic test → marking → warehousing.
 
The raw material for rolling square steel is square billet. The square steel embryo is cut by the cutting machine to process the billet with a length of about 1 meter, and is sent to the furnace for heating by the conveyor belt. The billet is sent into the furnace for heating at a temperature of about 1200 ℃. The fuel is hydrogen or acetylene. The temperature control in the furnace is a key problem.
Product Inspection
Packing and Transportation
In bundle, no other package or wrapped with waterproof, or as customers' requirement
Transportation: Express (Sample Delivery), Air, Rail, Land, Sea shipping (FCL or LCL or Bulk)
Our Customer
FAQ
Q: Are u a manufacturer?
A: Yes, we are spiral steel tube manufacturer locates in Daqiuzhuang village, Tianjin city, China
Q: Can I have a trial order only several tons?
A: Of course. We can ship the cargo for u with LCL serivece.(Less container load)
Q: Do u have payment superiority?
A: For big order, 30-90 days L/C can be acceptable.
Q: If sample free?
A: Sample free, but the buyer pays for the freight.
Q: Are you gold supplier and do trade assurance?
A: We seven years cold supplier and accept trade assurance.                  
 
      
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