• Sourcing Solutions
  • Services & Membership
  • Help & Community

Quick Details

  • Standard: ASTM, BS, DIN, GB, JIS
  • Grade: CRB550
  • Diameter: 4~12MM
  • Length: Any length or coil
  • Place of Origin: Tianjin, China (Mainland)
  • Brand Name: SJT
  • Model Number: 4~12mm
  • Application: building construction
  • Yield strength: 500Mpa
  • Tensile strength: 550Mpa
  • Agt: 8%

Packaging & Delivery

Packaging Details: standard package for exporting.

 Cold rolled ribbed steel wires and bars 

 

Product Description

 

      Cold rolled ribbed steel bar is made of hot rolled wire rod by multichanel cold-rolled,reducing a rib rolling and after stress relief form of a steel bar with two or three surface crescent. Cold rolled ribbed steel bar is the upgrading production of cold drawn low carbon steel wire in prestressed concret members. In cast-in-situ concrete structure,steel can be instead of I grade steel bar, in order to save steel, is better one in the same kind of cold rolled steel.

     Cold rolled ribbed steel grades by the CRB and reinforced the tensile strength of the minium.C,R,B,respectively (cold-rolled),cold-rolled ribbed(ribbed),steel bar(bars) three words of the first letter in English.

 

1. Standard: GB 13788-2008

2. Dia.: 3~12mm

3. Length: any length or coils

4. Coils weight: about 100kgs

5. Technology: cold-working

6. Yield strength: 500Mpa

7. Tensile strength: 550Mpa

8. Raw material: hot rolled wire rod 

9. Outside apperance: two sides ribbed or three sides ribbed

 

Steel bar grade anc chemical composition

Wire rod size and chemical composition for cold rolled ribbed steel bar 

Steel bar gradeWire rod gradeChemical composition(qualityscore)/%
CSiMnV,TiSP
CRB550

Q215 

Q235

0.09~0.15

0.14~0.22

≤0.30

≤ 0.30 

0.25~0.55

0.30~0.65

-

-

≤0.050

≤0.050

≤0.045

≤0.045

 

Two sides ribbed apperance and shape of cross section: 

 

Three sides ribbed apperance and shape of cross section: 

 

 

Dynam capability and Technic capability for cold rolled ribbed steel bar

Grade

Rpo.2/Mpa

Rm/Mpa

Tensility/% ≥

Bend test 180degree

Bend TImeThe stress relaxation initial value should be equivalent to 70% of the engineering tensile strength
A11.3A100
CRB5505005508-D=3d--

 

 

The size,quality and allowable devision for steel bar of two ribs and rib on three sides

 

 

Advantages for cold rolled steel bar 

1.High tensile strength steel, it can same material and reduce the project cost. CRB550 compared with hot rolled round steel bar, used for cast-in-place structure (especially the floor roof) can save 35%-40% steel. Such as considering no hook,steel more savings. 

 

2.Cold rolled ribbed steel bar the bond anchorage between reinforcment and concrete performance is good. Used in components, therefore, fundamentally eliminate the anchorage zone of cracking,steel wire slip and failure phenomenon, and improves the end bearing capacity and crack resistance of the component; In reinforced concrete structure, the crack width is better than round bar ,even smaller than hot rolled thread bar.

 

3.Elongation than the same kind of cold rolled ribbed bar.

 

Packaging & Shipping

 

 

 PRODUCTS

 

 

 

   

PRODUCTION LINE 

 

Our Services

 

CERTIFICATES:

 

 

 

Company Information

 

CONTACT

TEL:+86-022-23462771/23462772/23462773

FAX:+86-022-23462779

Email: sales(at)shengjintai(dot)com(dot)cn

Website: http://www.sinosteel-gs.com

Transaction History of the Supplier

Below is the information about the supplier's transactions conducted via Alibaba.com. If you require further details regarding the transaction data, please contact the supplier directly.

Transaction Overview

Transactions

Transaction Details

This supplier has completedtransactions with buyers from .

Shipping Destination
Transaction Value
Transaction Date
Email to this supplier
China (Mainland) | Trading Company
Transaction Level:
Supplier Assessments:
The supplier supports Trade Assurance – A free service that protects your orders from payment to delivery.
Supplier's Trade Assurance Limit: US $65,000
Learn More