BAOSTEEL METAL / REINFORCING STEEL

HRB500 Steel Rebar

HOT-ROLLED RIBBED BAR · GB 1499.2-2024 · 500 MPa MINIMUM YIELD GRADE

GB 1499.2-2024HRB500 / Marking 5Nominal Ø6–50 mm*Heat / Lot Traceability

Higher-strength reinforcementProject & bulk sourcing

CONFIDENT GRADE-SPECIFIC PROCUREMENT

Specify 500 MPa reinforcement with the right tests.

Source HRB500 hot-rolled ribbed reinforcing bars for projects that specify the 500 MPa grade. Review nominal diameters, tensile and bend requirements, bundle formats and documentation before confirming quantities or delivery arrangements.

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Review Mechanical Properties ↓

HRB500 hot rolled ribbed steel reinforcement bars bundled at a steel factory warehouse with authentic surface deformations

* Ø6–50 mm is the standard nominal range; available sizes, coil eligibility, quantities and lead times are verified for each enquiry.

8 Million MTActual annual steel output across product categories

1 Million MTCombined regular steel inventory across product categories

500,000 m²Factory area

1,000+Employees supporting manufacturing operations

PRODUCT OVERVIEW

What Is HRB500 Steel Rebar?

A hot-rolled ribbed reinforcement grade defined by its 500 MPa specified lower yield strength and GB 1499.2-2024 acceptance requirements.

500 MPa Hot-Rolled Ribbed Reinforcement

HRB500 is a hot-rolled ribbed reinforcing steel bar with a specified minimum lower yield strength of 500 MPa and minimum tensile strength of 630 MPa. It is intended for reinforced-concrete applications where this exact grade is permitted by the approved structural design. The ribs provide mechanical interlock with concrete, while nominal cross-sectional area and mass are determined by the standard bar designation.

Applicable standard: GB 1499.2-2024 is the current mandatory national standard, effective 25 September 2024 and replacing GB/T 1499.2-2018. The project design and governing building code determine where HRB500 may be used.

HRB500 and HRB500E Are Different Grades

The HRB500E E-designation adds specified measured-strength ratios, higher total elongation at maximum force and reverse-bend testing. Order ordinary HRB500 only where the project accepts it; confirm the precise grade on the drawings, purchase order and mill certificate.

500 MPaMinimum lower yield strength, R_eL

630 MPaMinimum tensile strength, R_m

7.5%Minimum total elongation at maximum force, A_gt

Have a reinforcement bar schedule?

Send nominal diameters, fixed lengths, grade, quantities, destination and inspection scope for a technical and commercial review.

TECHNICAL PROCUREMENT

HRB500 Steel Rebar Specifications

State HRB500 explicitly and confirm the latest standard edition, nominal size, form, mass basis and inspection documentation in the purchasing specification.

Specification	HRB500 supply reference
Product	Hot-rolled ribbed steel reinforcing bar for concrete
Grade	HRB500, standard rolled grade mark 5
Main product standard	GB 1499.2-2024 (replaces GB/T 1499.2-2018)
Grade strength designation	Minimum specified lower yield strength 500 MPa
Standard nominal diameter range	Ø6–50 mm; check actual supply by size
Nominal shapes	Deformed/ribbed bar, with specified rib geometry
Straight bar lengths	Fixed length by contract; standard length tolerance applies
Coil eligibility	Nominal Ø≤16 mm is permitted by standard; capability by order
Surface condition	Uncoated, hot-rolled; special protection subject to agreement
Quality evidence	Chemical analysis, tensile, elongation, 180° bend, size and mass checks
Rolled marking	Grade 5 plus specified producer identification and diameter
Material documents	Heat/lot traceable mill test certificate under agreed order
Supply & shipment	Diameter-by-diameter stock, production and export plan confirmed by enquiry

What Buyers Should Specify

Grade HRB500 to GB 1499.2-2024 with no unapproved grade substitution.
Bar diameters, lengths and total tonnage or piece counts for each size.
Straight bars or eligible coils, bundle mass, marking and loading preferences.
Required batch-level tensile, chemical, bend and mass/geometry checks.
Shipment location, trade terms, inspection documents and delivery schedule.

Specification boundary: HRB500 is not equivalent to HRB500E, HRBF500, ASTM A615 or ASTM A706 simply because the strength designation appears similar. Confirm substitutions with the project engineer.

Close-up real HRB500 hot-rolled ribbed reinforcement steel surface highlighting transverse deformation geometry

DIMENSIONS & THEORETICAL MASS

HRB500 Rebar Size & Weight Chart

Nominal bar diameter defines the reference mass and cross-sectional area; raised ribs are part of the surface profile and are not used as a smooth-circle outside diameter for weight calculation.

Nominal Ø (mm)	Nominal area (mm²)	Theoretical mass (kg/m)	12 m bar (kg)*	Supply
Ø6	28.27	0.222	2.664	Verify availability
Ø8	50.27	0.395	4.740	Verify availability
Ø10	78.54	0.617	7.404	Verify availability
Ø12	113.1	0.888	10.656	Verify availability
Ø14	153.9	1.21	14.520	Verify availability
Ø16	201.1	1.58	18.960	Verify availability
Ø18	254.5	2.00	24.000	Verify availability
Ø20	314.2	2.47	29.640	Verify availability
Ø22	380.1	2.98	35.760	Verify availability
Ø25	490.9	3.85	46.200	Verify availability
Ø28	615.8	4.83	57.960	Verify availability
Ø32	804.2	6.31	75.720	Verify availability
Ø36	1018	7.99	95.880	Verify availability
Ø40	1257	9.87	118.440	Verify availability
Ø50	1964	15.42	185.040	Verify availability

The theoretical weights follow the GB 1499.2-2024 nominal-mass series based on a reference density of 7.85 g/cm³. *12 m values are arithmetic estimates, not a stock-length commitment. Actual mass, tolerances and quantity acceptance follow the signed order and applicable standard.

Ordering multiple diameters?

Send one line per diameter, length and tonnage for a clearer factory quotation.

GB 1499.2-2024

HRB500 Steel Rebar Mechanical Properties

Mechanical performance is verified by grade-specific testing; minimum specified properties are not substitutes for heat or lot test results.

Swipe the table sideways on smaller screens to review all property notes →

Mechanical property	Symbol	HRB500 minimum	Test / procurement note
Lower yield strength	R_eL	500 MPa	Where no distinct yield is observed, use permitted R_p0.2.
Tensile strength	R_m	630 MPa	Specified minimum ultimate tensile strength.
Elongation after fracture	A	15%*	* For Ø28–40 mm the minimum may be reduced 1 percentage point; for Ø>40–50 mm, 2 points.
Total elongation at maximum force	A_gt	7.5%	Different test measure from A; use the standard reporting and referee provisions.
Measured tensile / measured yield ratio	R⁰_m / R⁰_eL	No extra E-grade ≥1.25 requirement	Applies to HRB500E; not to ordinary HRB500 under this table.
Measured yield / characteristic yield ratio	R⁰_eL / 500	No extra E-grade ≤1.30 requirement	E-grade condition is specific to HRB500E, not ordinary HRB500.

Mechanical acceptance: Rebar characteristics above are the current standard requirements for the corresponding nominal size. Verify a batch-specific mill certificate and contract requirements; A (fracture elongation) and A_gt (total elongation at maximum force) are separate measurements.

≥500 MPa

Specified lower yield strength

≥630 MPa

Specified tensile strength

≥15%*

Elongation after fracture

≥7.5%

A_gt total elongation

Check grade-specific test values, not only the nominal 500 MPa label.

Request an MTC listing the relevant batch and specimen results.

CHEMISTRY & CARBON EQUIVALENT

HRB500 Chemical Composition Limits

GB 1499.2-2024 includes heat-analysis maxima for HRB500 and the corresponding carbon-equivalent calculation.

Heat Analysis Maximums

Element / criterion	Maximum value
Carbon (C)	≤0.25%
Silicon (Si)	≤0.80%
Manganese (Mn)	≤1.60%
Phosphorus (P)	≤0.045%
Sulfur (S)	≤0.045%
Carbon equivalent (Ceq)	≤0.55%

Values above are the GB 1499.2-2024 heat-analysis limits for the HRB500 grade group. Actual chemistry is recorded for the relevant heat; permissible product-analysis deviations are governed by the standard.

Carbon Equivalent & Connections

Carbon equivalent provides a compositional input when assessing welding requirements. Engineering welding procedures, bar size, joint type and project codes must also be considered.

C_eq = C + Mn/6 + (Cr+V+Mo)/5 + (Cu+Ni)/15

Request heat-specific chemical results and C_eq on the agreed mill certificate.
The grade permits suitable alloying additions such as V, Nb or Ti within applicable acceptance requirements.
Welding and mechanical connection procedures should comply with project requirements and applicable JGJ 18 / JGJ 107 provisions.
HRB500 ordinary grade does not imply seismic E-grade certification.

Genuine HRB500 ribbed reinforcing steel bar with legible rolled grade number 5 and mill identification as actually produced

BENDING & GRADE IDENTIFICATION

180° Bend Tests, Rib Geometry & HRB500 Marking

Bending verification and correctly rolled identifiers help purchasing and receiving teams confirm the ordered grade.

HRB500 180° Bend Test

Nominal diameter	Bend mandrel diameter D
Ø6–25 mm	6d
Ø28–40 mm	7d
Ø>40–50 mm	8d

Here d is the nominal rebar diameter; a standard test specimen is bent through 180° using the specified mandrel and checked for cracking on the bent surface.

For ordinary HRB500, the E-grade reverse-bend requirement is not automatically imposed. HRB500E requires separate reverse-bend testing; its mandrel diameter is one nominal bar diameter greater than the corresponding bend-test mandrel.

Rolled Identification & Surface Inspection

Rolled grade mark 5 identifies HRB500; grade 5E identifies HRB500E.
Check the producer mark or identification and the nominal diameter on the bar.
Verify transverse rib geometry, dimensions, theoretical-mass deviations and surface condition.
Record heat or lot references and connect receiving records with the certificate.
If bridge or railway fatigue performance is specified, confirm diameter-specific fatigue report requirements.

BULK SUPPLY OPTIONS

HRB500 Steel Rebar Supply Formats

Specify required shipment configuration, bar length and quantities by nominal diameter; actual manufacturing capabilities are confirmed against each order.

Straight HRB500 deformed steel reinforcing bars bundled with steel ties in an industrial yard

Straight Deformed Rebar

Fixed-length HRB500 bars for reinforcement schedules, construction distribution and fabrication. Specify length tolerances, diameter-by-diameter bundles and exact tonnage.

Coils of small diameter ribbed steel reinforcement from a production line where HRB500 coil supply is confirmed

Eligible Coils

The standard allows coil delivery for nominal diameters not exceeding 16 mm. Request coil size, mass and real production availability before purchase.

Rib Profile & Bar Ends

Surface deformations, nominal diameter identification, straightness and traceable mill marks are part of receiving checks.

PROJECT APPLICATIONS

HRB500 Steel Rebar Applications

The design engineer, governing structural code and connection plan determine whether HRB500 is appropriate for a particular structural member.

01 / STRUCTURAL

Reinforced Concrete Frames

Longitudinal and transverse reinforcement specified for engineered beams, columns or frames.

02 / FOUNDATIONS

Footings & Foundations

Reinforcing steel for reinforced-concrete foundation mats, pile caps and other approved designs.

03 / HIGH-RISE

Dense Reinforcement Plans

500 MPa-grade steel where designers seek a specified strength class and suitable detailing.

04 / INFRASTRUCTURE

Bridge & Civil Works

Project-specific reinforcement subject to approved connection, fatigue and inspection requirements.

05 / PRECAST

Precast Concrete Elements

Factory reinforcement cages and precast units where the grade appears on approved drawings.

06 / DISTRIBUTION

Steel Rebar Distribution

Bulk straight-bar or eligible coil purchase programmes organized by diameter and certification.

Workers placing real ribbed reinforcing steel bars on a reinforced concrete construction project following approved detailing

Engineering note: HRB500’s specified 500 MPa minimum yield strength alone does not establish equivalence with another rebar grade or authorize use in a seismic-critical structure. Follow the local project code and approved bar schedule.

GRADE SELECTION

HRB500 vs HRB500E vs HRB400 Rebar

Compare specified minimum properties and seismic-related controls; never substitute grades without project approval.

01 / THIS PRODUCT

HRB500 Steel Rebar

500 MPa minimum yield, 630 MPa minimum tensile strength, A_gt ≥7.5% and ordinary Grade 5 rolled marking.

500 MPa | standard HRB grade

View Grade & Specifications ↗

02 / SEISMIC-RELATED

HRB500E Steel Rebar

Same minimum yield/tensile grades, plus A_gt ≥9.0%, measured-strength ratio controls, reverse-bend testing and 5E marking.

500 MPa | additional E controls

View Grade & Specifications ↗

03 / LOWER STRENGTH

HRB400 Steel Rebar

400 MPa minimum yield, 540 MPa minimum tensile strength, A_gt ≥7.5%; selected when permitted by the approved design.

400 MPa | standard HRB grade

View Grade & Specifications ↗

Grade selection: HRB500 and HRB500E are distinct delivery designations. A numerical yield-grade match does not establish equivalence to ASTM reinforcement products, and E-grade certification is not implied by HRB500.

HRB400E Rebar ↗ASTM Steel Rebar ↗All Rebar Grades ↗

WHY BAOSTEEL METAL

Factory-Based Reinforcement Supply

Four company-wide capabilities supporting large steel purchasing programmes—not product-specific immediate stock promises.

01 / CAPACITY

Industrial Manufacturing Scale

Annual steel output of 8 million metric tons across the company’s overall product lines to support bulk sourcing.

02 / INVENTORY

Coordinated Availability

Combined regular inventory of 1 million metric tons across categories; HRB500 sizes and tonnage are checked per enquiry.

03 / QUALITY

Order-Specific Inspection

Grade identification, chemical and mechanical test requirements, traceability and certificate options are reviewed with the order.

04 / EXPORT

Project-Focused Logistics

Bar lengths, bundle weights, port handling, staged dispatches and export documentation can be planned around your shipment.

Buying for a construction project or steel distribution?

Provide a grade-by-size schedule for technical and commercial review.

PLANNING TONNAGE

HRB500 Rebar Weight Calculator

Estimate bar mass by nominal GB rebar diameter, per-bar length and number of pieces. Useful for bulk enquiries and shipment planning.

Enter Your Bar Schedule

Nominal bar diameterNominal weight per meter (kg/m)Bar length (meters)Number of bars (pcs)

2.964 MTEstimated total theoretical weight

29.640 kgEstimated weight per bar

100 barsNumber of pieces entered

How the Calculation Works

The tool uses the nominal mass-per-metre table in GB 1499.2-2024 rather than measuring a rib-to-rib outside diameter and applying a smooth round-bar formula.

Total MT = nominal kg/m × bar length (m) × quantity ÷ 1,000

Example: Ø20 mm has a nominal mass of 2.47 kg/m. For 12 m bars and 100 pieces, the theoretical total is 2.964 metric tons.

Calculated mass is an estimate for quotation planning. The actual contracted weight, accepted mass tolerance, bundle count, cutting loss and loading plan are determined separately.

View Full Size Chart ↗

HOT-ROLLED PRODUCTION

Rebar Manufacturing & Supply Coordination

Reinforcing bars are hot rolled to the required grade and rib profile, finished, inspected, bundled and prepared for shipment under the agreed purchase specification.

Confirm GB 1499.2-2024 and exact HRB500 grade before mill allocation.
Review requested diameter, shape, length, mass and bundle arrangement.
Identify relevant heat and test records for ordered material.
Coordinate dispatch and export documents according to delivery terms.

Our Manufacturing Capability ↗

Industrial hot-rolling mill line producing red-hot deformed steel reinforcement with authentic rolling equipment

Large industrial steel yard with tagged HRB500-like ribbed rebar bundles stored on supports in orderly rows

AVAILABILITY BY ENQUIRY

Check HRB500 Rebar Sizes & Lead Times

BAOSTEEL METAL holds 1 million metric tons of regular inventory across its combined steel categories. Availability of individual HRB500 diameters, cut lengths, bundles and shipment quantities is verified for each enquiry.

Specify each nominal diameter and the weight or number of pieces.
State straight-bar lengths, coil needs if applicable, and acceptable alternatives.
Include inspection scope, destination port and project schedule.
Confirm delivery terms and purchase-order certificate wording.

QUALITY ASSURANCE

HRB500 Rebar Inspection & Mill Test Certificates

Confirm grade, heat, nominal size and test results against the signed order and GB 1499.2-2024. Document requirements vary by project and inspection plan.

Heat- or lot-referenced MTC and identification marks for each acceptance batch.
Measured yield strength, tensile strength, A and/or A_gt per applicable test provisions.
Chemical composition including carbon equivalent Ceq, with sample traceability.
180° bend test mandrel size and surface crack check for the specified diameter.
Nominal unit mass, mass tolerance, diameter and rib geometry inspection.
Extra fatigue or third-party witness reports when required by the project.

Acceptance scope: Ordinary HRB500 is checked to its designated criteria. If the project requires HRB500E, specify E grade and obtain its additional test evidence. Mass tolerance and mill certification are reviewed at batch level.

Steel testing laboratory technician inspecting ribbed HRB500 rebar and reviewing real tensile test and mill certificate records

ORDER-BASED OPTIONS

Cut Lengths, Fabrication Schedules & Handling

Project bars may need further cutting, bending or segregation. The scope is agreed before scheduling and quotation.

01 / CUTTING

Cut-to-Length Supply

Straight bar cut lengths can be reviewed against material diameter and approved bill of quantities; commercial minimums depend on order volume.

02 / FABRICATION

Bending by Approved Schedule

Fabrication bending should follow the project’s approved bending schedules, detailing, minimum bend radii and governing site code.

03 / LOGISTICS

Marking & Sorting

Segregate reinforcement bundles by grade, diameter, heat or construction schedule line for efficient receiving and traceability.

On-site welding, re-bending and mechanical joining are governed by engineering design and applicable construction standards. Confirm process suitability and approved procedures before fabrication.

Long bundles of ribbed HRB500 steel reinforcement secured with steel ties on timber supports for export loading

PACKING & SHIPPING

Rebar Export Packing & Delivery

Loading and packaging options are set by bar diameter, length, bundle weight, destination and transport method. Ordered items are identified for receiving and certificate traceability.

Steel-tied bundles grouped by diameter and agreed bar length.
Bundle tags aligned with grade, heat and quantity documents.
Support and lifting provisions appropriate for long steel products.
Packing lists and shipping paperwork according to sale terms.

BUYER FAQ

HRB500 Steel Rebar Questions

Reference answers for civil contractors, reinforcement fabricators and bulk steel purchasing teams.

What is HRB500 steel rebar?

HRB500 is a hot-rolled ribbed steel reinforcement grade under GB 1499.2-2024 with minimum specified lower yield strength 500 MPa and tensile strength 630 MPa.

Which GB standard applies to HRB500 rebar in 2026?

GB 1499.2-2024 is the current mandatory standard for hot-rolled ribbed concrete reinforcing bars. It replaced GB/T 1499.2-2018 on 25 September 2024.

What is the difference between HRB500 and HRB500E?

Both grades have minimum specified yield 500 MPa and tensile 630 MPa. HRB500E adds E-grade actual strength-ratio controls, Agt at least 9%, reverse-bend testing and rolled marking 5E. HRB500 is marked 5.

What elongation is required for HRB500 rebar?

The base requirement is elongation after fracture A at least 15% and total elongation at maximum force Agt at least 7.5%. For A at Ø28–40 mm, a one-point reduction is permitted, and for Ø>40–50 mm a two-point reduction is permitted.

How is HRB500 bend performance checked?

The 180-degree bend mandrel reference is 6d for Ø6–25 mm, 7d for Ø28–40 mm and 8d for Ø>40–50 mm, where d is nominal diameter. The test bend surface must remain free from cracks.

What diameter range is covered by the standard?

GB 1499.2-2024 covers nominal diameters from Ø6 to Ø50 mm. Supply, straight bar length, coils in eligible sizes and project tonnage must be checked for each order.

How much does 20 mm HRB500 rebar weigh?

The standard nominal mass for Ø20 mm is 2.47 kg/m. A 12 m bar is 29.64 kg, and 100 pieces have a nominal theoretical total of 2.964 metric tons.

What are the chemical composition limits for HRB500?

Typical GB 1499.2-2024 heat-analysis maxima for the grade group include C 0.25%, Si 0.80%, Mn 1.60%, P 0.045%, S 0.045% and carbon equivalent Ceq 0.55%.

Can HRB500 rebar be welded or mechanically coupled?

Use the approved project procedure and applicable joint acceptance standards such as JGJ 18 and JGJ 107. Carbon equivalent and the proposed joint and bar size are part of the engineering review.

What should be included in a bulk HRB500 enquiry?

Specify HRB500 to GB 1499.2-2024, nominal diameters, lengths, quantity or weight, inspection and MTC requirements, delivery destination, commercial terms and schedule.

BAOSTEEL METAL / HRB500 REINFORCEMENT

Request Your HRB500 Steel Rebar Quote

Send GB 1499.2-2024, bar diameters, lengths, quantities, MTC / inspection requirements and destination. We will check order-specific supply and quotation terms.

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