This British Standard specifies requirements for ribbed weldable reinforcing; steel used for the reinforcement of concrete structures. The standard covers steel delivered in the form of bars, coils and decoiled products. The standard contains provisions for three steel grades, all of 500 MPa characteristic yield strength, but with different ductility characteristics. The three grades are B500A. B500B and B500C.
The weldability requirements for all grades of steel are specified in terms of the chemical composition, and in particular the carbon equivalent value.
Steel bars produced by re-rolling finished products, or by rolling material of which the metallurgical history is not fully documented or not known, are not covered by this British Standard.
NOTE Flash welds in lengths of bar are permissible under this standard, provided all the mechanical requirements are met. However, for some purposes, purchasers might specifically require bars without flash welds, and if so this ought to be stated at the time of enquiry and/or order.
BS 4449:2005 history
2005BS 4449:2005+A3:2016 Steel for the reinforcement of concrete - Weldable reinforcing steel - Bar, coil and decoiled product - Specification
2005BS 4449:2005+A2:2009 Steel for the reinforcement of concrete - Weldable reinforcing steel - Bar, coil and decoiled product - Specification
2005BS 4449:2005 Steel for the reinforcement of concrete - Weldable reinforcing steel - Bar, coil and decoiled product - Specification
1997BS 4449:1997 Specification for carbon steel bars for the reinforcement of concrete