BS4449 Grade 500B Steel Rebar

Overview of BS4449 Grade 500B Steel Rebar

BS 4449 Grade 500B is the standard high-yield reinforcing steel rebar specified throughout the United Kingdom, Ireland, Commonwealth nations, and international markets following British construction standards. Specified under BS 4449:2005+A3:2016 standard (Carbon steel bars for the reinforcement of concrete – Reinforcing steel), Grade 500B represents high-strength ductile reinforcement bar with a characteristic yield strength of 500 MPa (72,500 psi) and minimum tensile strength of 525 MPa (76,125 psi). The grade designation ‘500B’ indicates the characteristic yield strength in MPa and ductility class B, distinguishing it from lower-ductility Grade 500A and higher-ductility seismic-grade 500C.

BS 4449 Grade 500B rebar features the British standard rib pattern with transverse ribs designed for optimal mechanical bond with concrete, manufactured to precise dimensional tolerances and surface geometry requirements. The grade is produced from continuously cast billet steel with controlled chemical composition including carbon equivalent (CEV) limits to ensure weldability per BS 8666 bending and fixing specifications. Grade 500B is the predominant reinforcement choice for reinforced concrete construction projects in the UK, Ireland, Middle East, Africa, Southeast Asia, and other regions that adopt British building codes and Eurocodes. The ‘B’ ductility class provides the balanced combination of strength and ductility required for most structural applications under BS EN 1992 (Eurocode 2) design standards.

Key Features and Manufacturing Standards

BS 4449 Grade 500B steel rebar is produced through continuous hot rolling process from continuously cast billet feedstock, with controlled cooling and optional Tempcore or similar thermomechanical treatment to achieve the specified mechanical properties and fine-grained microstructure. The rib pattern is formed during the final rolling pass using precision grooved rolls, creating standardized transverse ribs meeting BS 4449 requirements for relative rib area (fR ≥ 0.040 for sizes ≤12mm, ≥0.056 for sizes >12mm) to ensure superior concrete bond performance.

The rebar is supplied in metric bar designations from 8mm through 40mm diameter, with the most common project sizes being 10mm, 12mm, 16mm, 20mm, 25mm, and 32mm for general structural work. Standard mill lengths are 6 meters and 12 meters following metric construction standards, with cut-to-length service available for specific project requirements. Each bar is permanently roll-marked at intervals not exceeding 1.5 meters with manufacturer identification code, steel grade designation (500B or equivalent marking system), nominal size, and batch identification number for complete supply chain traceability per CARES (Certification Authority for Reinforcing Steels) requirements. All UK-supplied material typically carries CARES certification demonstrating compliance with BS 4449 and ongoing quality surveillance.

Main Applications of BS4449 Grade 500B Steel Rebar

BS 4449 Grade 500B steel rebar is the primary structural reinforcement for the vast majority of reinforced concrete construction projects in the United Kingdom, Ireland, and international markets following British standards and Eurocodes. Building construction applications include strip foundations, pile caps, ground beams, reinforced concrete frame columns, transfer beams, flat slab reinforcement, ribbed slab systems, post-tensioned slab conventional reinforcement, RC wall reinforcement, core walls in high-rise structures, staircase construction, and basement waterproof structures in residential estates, commercial offices, retail developments, hotels, hospitals, educational facilities, multi-storey car parks, and tower blocks.

Civil infrastructure projects extensively use Grade 500B for highway bridge deck reinforcement, bridge pier and abutment construction, viaduct structures, subway and underground station construction, railway platform structures, airport terminal buildings, runway pavement dowel assemblies, port and harbor quay walls, marine jetty structures, coastal defense works, and flood barrier construction. Water engineering applications include water treatment works, sewage treatment plant tanks, pumping station structures, reservoir construction, attenuation tank reinforcement, and drainage infrastructure. The grade is also specified for industrial facility foundations, heavy-duty warehouse floor slabs, power station civil structures, petrochemical plant foundations, wind turbine tower foundations, telecommunications mast bases, defense infrastructure, and comprehensive public sector construction projects requiring compliance with UK Building Regulations and Eurocodes for reinforced concrete design.

Why Choose Us for BS4449 Grade 500B Steel Rebar

Shandong Tanglu Metal Material Co., Ltd. supplies premium BS 4449 Grade 500B steel rebar manufactured to British specification standards from major Chinese steel mills with international certification and proven export experience to UK, Middle East, African, and Southeast Asian markets. Every production lot undergoes mandatory chemical composition analysis including carbon equivalent verification, mechanical property testing covering yield strength (Re), tensile strength (Rm), percentage elongation at maximum force (Agt), and Re/Rm ratio verification, plus bend and rebend testing per BS 4449:2005+A3:2016 requirements, ensuring full compliance with British and Eurocode structural standards.

We offer comprehensive metric bar size range from 8mm through 40mm diameter in standard 6m and 12m lengths, with precision cut-to-length service and BS 8666 schedule bending available through our partner fabrication facilities. With monthly export capacity of 15,000 tons of BS 4449 compliant rebar and established relationships with reinforcement distributors, approved stockists, and main contractors in over 30 countries, we support both project-specific supply packages and ongoing merchant stock replenishment. Each shipment includes original mill test certificate conforming to EN 10204 3.1 standard with full BS 4449 test reporting, with EN 10204 3.2 independent certification and third-party inspection (SGS, BV, CCIC, Intertek, ALS) available for major projects requiring CARES-equivalent documentation. Our BS 4449 Grade 500B rebar meets the stringent quality requirements for supply to UK construction projects and international developments specifying British reinforcement standards.