Home > Products > Reinforcing bar

Reinforcing bars

Celsa produce Grade B500C high ductility hot rolled, ribbed steel bar, for use in the reinforcement of concrete. Our Grade B500C reinforcing bars meet all the requirements of BS 4449:2005 + A3:2016 Grade B500C, are fully weldable, and are available in all BS 4449:2005 preferred sizes, from 10 to 50 mm.

All our BS 4449:2005 + A3:2016 reinforcement is BBA and CARES approved, and is certified to BES6001 responsible sourcing standard through the Eco-Reinforcement responsible sourcing scheme.

Product range

Nominal size Cross-sectional area Mass per metre
mm mm2 kg
10 78.5 0.616
12 113.1 0.888
16 201.1 1.579
20 314.2 2.466
25 490.9 3.854
32 804.2 6.313
40 1256.6 9.864
50 1963.4 15.413

Mechanical properties

Yield strength Re (characteristic) 500MPa
Bend requirements BS 4449:2005 +A3:2016
Fatigue requirements BS 4449:2005 +A3:2016
Bond requirements BS 4449:2005 +A3:2016
BS 5400-4:1990
BS EN 1992-1-1:2004
BS EN 10080:2005
Eurocode 2 (EC2)
Welding requirements BS 4449:2005 +A3:2016,
BS EN 10080:2005
BS 7123:1989


Standard lengths 6m, 12m, 14m, 15 m (Dependent on Diameter)
Special lengths (available by prior order) from 6m to 18 m
Length tolerance -0 +100 mm

Ductility properties

Stress ratio: Ultimate tensile strength/Yield strength (fs/fy) 1.15 to 1.35
Uniform elongation (Agt) ≥ 7.5%

Bar geometry and rolling marks

The rib pattern for Celsa Grade B500C bars is the double angle rib pattern which complies with BS 4449:2005.


  • For general reinforcement of concrete structures.
  • Moment distribution (up to 30%) in reinforced concrete design
  • Additional ductility allows plastic/non-linear design
  • Additional ductility and cyclic performance make it suitable for any potential overload situations where inherent robustness is important
  • Other design applications include: pile caps, retaining walls, shear walls, beams and columns.

Get to know CELSA Group™