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BAOSTEEL METAL / SEISMIC-GRADE REINFORCEMENT

HRB500E Steel Rebar

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

GB 1499.2-2024HRB500E / 5E MarkNominal Ø6–50 mm*E-Grade Verification
Seismic-related performance controlProject & bulk procurement
500 MPa REBAR / CONTROLLED DUCTILITY

Specify the 500 MPa grade with verified E-grade performance.

Procure HRB500E hot-rolled ribbed rebar for approved reinforced-concrete designs requiring seismic-grade controls. Review minimum strength, measured-strength ratios, 9% total elongation, reverse-bend acceptance and diameter-specific nominal weights before ordering.

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See E-Grade Test Requirements ↓
HRB500E ribbed reinforcing steel bar bundles in an authentic industrial steel stockyard showing actual deformed rebar surfaces

* Ø6–50 mm is the nominal range in GB 1499.2-2024. Actual grade-by-size supply, straight-bar or coil format, lead time and documentation are confirmed for each order.

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
HIGH-STRENGTH E-GRADE

What Is HRB500E Steel Rebar?

HRB500E combines the 500 MPa specified yield-strength class with additional measured ductility, strength-ratio and reverse-bend controls.

500 MPa Seismic-Grade Ribbed Reinforcement

HRB500E is a hot-rolled ribbed reinforcing bar defined in GB 1499.2-2024. The specified lower yield strength is at least 500 MPa and tensile strength at least 630 MPa. The E suffix identifies added acceptance criteria based on measured strength ratios, total elongation at maximum force and reverse-bend testing.

Current standard: GB 1499.2-2024 took effect on 25 September 2024 and replaced GB/T 1499.2-2018. Use in seismic or other structural elements is subject to the approved design and applicable project code.

Three Measured Values Buyers Should Check

HRB500E is not simply ordinary HRB500 with a different name. Confirm that the mill test data demonstrate the actual strength-ratio and elongation criteria in addition to the 500/630 MPa minimum strengths.

≥1.25Actual tensile strength ÷ actual yield strength
≤1.30Actual yield strength ÷ 500 MPa
≥9.0%Agt, total elongation at maximum force
Ordering reinforcement for an engineered project?

Share diameter-by-diameter quantities, straight lengths, design grade and required lot inspection documents.

TECHNICAL SPECIFICATION

HRB500E Steel Rebar Specifications

For project procurement, specify the complete grade designation, standard edition, nominal size and acceptance testing in the purchase order.

Procurement itemHRB500E specification
ProductHot-rolled ribbed reinforcing steel bar, E-designated grade
Product standardGB 1499.2-2024 (mandatory national standard)
Ordered gradeHRB500E; do not substitute HRB500 or HRBF500E without approval
Rolled identification5E, together with producer identification and nominal diameter
Specified lower yield≥500 MPa (ReL or permitted Rp0.2)
Specified tensile strength≥630 MPa (Rm)
E-grade ductilityAgt ≥9%; measured strength-ratio requirements apply
Nominal bar diametersØ6–50 mm in the standard; confirm actual size availability
Supply formStraight bars; coils allowed by standard for Ø≤16 mm subject to confirmation
Length and deliveryFixed or agreed cut lengths; standard and contractual tolerances
TestsChemistry/Ceq, tensile and ratios, Agt, 180° bend, reverse bend, dimensions/mass
Production requirementSecondary refining is specified for HRB500E under GB 1499.2-2024
Document packageBatch/heat-identifiable MTC, tags and additional inspection as agreed
Export quotationConfirm per-size stock or production, packing, trade terms and lead time

Your HRB500E Enquiry Checklist

  • State HRB500E to GB 1499.2-2024 and identify the applicable project drawings or code.
  • Provide each nominal diameter, bar length, bundle preference and quantity or tonnage.
  • Require rolled 5E identification and heat/lot traceability.
  • Specify measured-strength ratios, Agt, bend and reverse-bend acceptance in test documentation.
  • Confirm destination, delivery terms, inspection witness, shipping dates and any special packaging.
Procurement note: Material grade and structural suitability are distinct. Any substitute material, different national standard or alternate designation requires the engineer’s approval.
Detailed close-up of hot rolled HRB500E deformed rebar rib pattern and naturally finished steel surface
DIMENSIONS & THEORETICAL MASS

HRB500E Rebar Size & Weight Chart

Theoretical mass is based on nominal diameter and the GB 1499.2-2024 table; raised ribs are not measured as a round bar outside diameter.

Nominal Ø (mm)Nominal area (mm²)Theoretical mass (kg/m)12 m bar (kg)*Supply
Ø628.270.2222.664Verify availability
Ø850.270.3954.740Verify availability
Ø1078.540.6177.404Verify availability
Ø12113.10.88810.656Verify availability
Ø14153.91.2114.520Verify availability
Ø16201.11.5818.960Verify availability
Ø18254.52.0024.000Verify availability
Ø20314.22.4729.640Verify availability
Ø22380.12.9835.760Verify availability
Ø25490.93.8546.200Verify availability
Ø28615.84.8357.960Verify availability
Ø32804.26.3175.720Verify availability
Ø3610187.9995.880Verify availability
Ø4012579.87118.440Verify availability
Ø50196415.42185.040Verify 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 / GRADE 500E

HRB500E Mechanical & Seismic-Related Performance

Confirm minimum strengths, actual test ratios and total elongation from the same acceptance lot; the listed figures are grade requirements, not individual MTC results.

On small screens, swipe the table horizontally to view all verification notes →

Property / testSymbol or formulaRequired valueProcurement / test note
Lower yield strengthReL≥500 MPaUse Rp0.2 where the standard permits for bars without distinct yield.
Tensile strengthRm≥630 MPaGrade-specific minimum; report measured ultimate tensile strength.
Total elongation at maximum forceAgt≥9.0%E-grade requirement; check the reported total elongation result.
Actual tensile-to-yield strength ratioR0m / R0eL≥1.25Calculate from measured tensile and yield strengths, not 630 ÷ 500.
Actual-to-specified yield strength ratioR0eL / 500≤1.30Measured yield divided by 500 MPa; controls excessive actual yield.
Elongation after fractureANo separate numeric E-grade limit in Table 6A and Agt are different measures; standard permits A for factory inspection, with Agt for arbitration.
Important: The 1.25 and 1.30 ratios rely on actual test data. Dividing minimum specified strengths (630/500) does not prove an individual heat meets the E-grade ratio. Match all test results to the declared batch and contract edition.
≥500 MPa

Minimum specified yield strength

≥630 MPa

Minimum specified tensile strength

≥9.0%

Agt for E grade

≥1.25 / ≤1.30

Actual-strength ratio checks

Verify the tested E-grade, not only the rolled mark.

Include the actual strengths, elongation results, lot identification and reverse-bend record in the agreed inspection scope.

CHEMICAL ANALYSIS

HRB500E Chemical Composition & Carbon Equivalent

The standard specifies heat-analysis ceilings for the HRB500 grade group, and secondary refining for the E-designated 500 grade.

GB 1499.2-2024 Heat-Analysis Maximums

Element / parameterMaximum (mass fraction)
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%

Limits apply to heat analysis for the HRB500/HRB500E group. Product-analysis deviations, nitrogen limits and permissible microalloying additions follow the standard and the agreed order.

Secondary Refining & Connection Controls

GB 1499.2-2024 specifies secondary refining for HRB500E. Request appropriate grade and heat traceability in the ordered quality documentation; do not assume a particular steelmaking route or furnace arrangement for an individual shipment.

Ceq = C + Mn/6 + (Cr+V+Mo)/5 + (Cu+Ni)/15
  • Confirm measured chemical composition and Ceq for the relevant heat.
  • Check the E-grade tensile ratios, Agt and laboratory bend records separately from chemistry.
  • Welded and mechanical joints must follow approved project procedures and applicable JGJ 18 / JGJ 107 requirements.
BEND TESTING / GRADE IDENTIFICATION

HRB500E Bend, Reverse-Bend & 5E Marking

Diameter-specific laboratory bend and reverse-bend tests, plus rolled identification, form part of grade acceptance.

Lab Bend Mandrels by Nominal Diameter

Nominal diameter180° bend mandrelReverse-bend mandrel
Ø6–25 mm6d7d
Ø28–40 mm7d8d
Ø>40–50 mm8d9d

Here d is the nominal bar diameter. The prescribed 180° bend and E-grade reverse-bend specimens must be free of cracking at the bent surface.

Reverse bend: for E-designated rebar, the reverse-bend mandrel is 1d larger than the matching ordinary bend-test mandrel. These are laboratory criteria, not field fabrication bend radii.

Confirm the Rolled Grade Code 5E

HRB500E must be identifiable by the rolled grade mark 5E, with producer identification and nominal diameter. Compare genuine bar markings, bundle tags, heat/lot references and the supplied MTC.

Authentic HRB500E steel rebar rolled 5E grade marking with real producer and nominal diameter identification on ribbed steel

Select a genuine marking photograph. The image area has no added text, logo, artificial grade stamp or overlay.

BULK SUPPLY FORMATS

HRB500E Rebar Forms & Practical Handling

Reinforcing bar format affects unloading, bending schedules, storage, freight capacity and site preparation.

Straight lengths of HRB500E seismic grade ribbed steel reinforcement in strapped industrial bundles

Straight Rebar

Straight bars for cut-and-bend schedules, concrete foundations, columns and other site reinforcement work. Confirm fixed lengths and diameter-specific bundles.

Coiled hot rolled ribbed steel reinforcing bar in an industrial mill storage yard, eligible sizes only

Coils, Where Applicable

Coiled material can support continuous processing or automated straightening on eligible sizes. Coil capability, size range and handling rules must be checked by enquiry.

True cross sections and rib profile of hot rolled E grade deformed steel reinforcement

Rib Profile & Bar Ends

Deformations, bar ends, nominal-mass compliance and rolled marking are among the physical characteristics checked when receiving steel reinforcement.

ENGINEERED APPLICATIONS

Where HRB500E Reinforcing Bars Are Specified

High-strength E-grade materials can be selected for engineered reinforcement details, subject to design approval and local construction regulations.

01 / STRUCTURAL FRAMES

Engineered Concrete Frames

500 MPa E-grade longitudinal reinforcement when called for in reinforced-concrete beams, columns or frames.

02 / DUCTILITY ZONES

Seismic Design Details

Reinforcement used in engineered ductility-sensitive zones with verified E-grade material acceptance.

03 / HIGH-RISE

High-Rise Construction

Diameter- and lot-controlled reinforcement for approved high-rise concrete structural plans.

04 / INFRASTRUCTURE

Civil & Transport Works

Specified reinforcement for civil infrastructure with applicable fatigue and joint testing requirements.

05 / PRECAST

Precast Rebar Assemblies

Grade-traceable bars supplied for factory rebar cages and precast concrete components.

06 / PROJECT SUPPLY

Contractor & Distributor Orders

Diameter-separated and tagged batches for scheduled deliveries and qualified project procurement.

Material Compliance Is One Part of Structural Safety

HRB500E’s E-grade properties support material selection, but seismic performance also depends on approved design, bar anchorage, splice detailing, fabrication and installation. The project engineer determines suitability and any substitutions.

For cyclically loaded bridge, railway or urban-rail structures, the standard may require fatigue testing evidence matched to the specific grade and diameter.
Industrial construction worksite with actual hot rolled ribbed reinforcing steel bars in a concrete structural reinforcement cage
PRODUCT SELECTION

HRB500E vs HRB500 vs HRB400E Rebar

Compare E-grade controls, specified strength class and rolled identification before considering a substitution.

01 / THIS PRODUCT

HRB500E Steel Rebar

Yield ≥500 MPa, tensile ≥630 MPa, Agt ≥9%, measured-strength ratios ≥1.25 / ≤1.30 and required reverse-bend testing.

5E / 500 MPa E-grade
02 / NON-E GRADE

HRB500 Steel Rebar

Same 500/630 MPa specified strength minima but Agt ≥7.5%; E-grade strength-ratio and reverse-bend rules are not automatically applied.

5 / 500 MPa standard grade
View Grade & Specifications ↗
03 / LOWER STRENGTH E

HRB400E Steel Rebar

Yield ≥400 MPa, tensile ≥540 MPa, Agt ≥9% and the same style of E-grade ratio requirements.

4E / 400 MPa E-grade
View Grade & Specifications ↗
Engineering selection: HRB500E, HRB500, HRB400E and ASTM rebar grades are not automatically interchangeable. Confirm the approved bar schedule and structural design before changing specifications.
HRB400 Steel 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; HRB500E sizes and tonnage are checked per enquiry.

03 / QUALITY

Order-Specific Inspection

Grade, ratio, elongation, chemical and reverse-bend 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

HRB500E 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

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 ↗
STEELMAKING & HOT ROLLING

Rebar Manufacturing & Supply Coordination

HRB500E supply should be checked against the standard’s production, grade and acceptance requirements before confirming an export programme.

From Steelmaking to Traceable Bundles

GB 1499.2-2024 specifies secondary refining for HRB500E, followed by compliant rolling, finishing, inspection and identification. Procurement teams should match the required production scope and test records to the grade and delivery lot.

  • Specify GB 1499.2-2024 and the full HRB500E designation.
  • Agree diameters, straight lengths or eligible coils, packing and nominal mass.
  • Review the lot-by-lot MTC and measured E-grade strength ratios.
  • Coordinate production, inspection witness and export documents by contract.
Explore Rebar Range ↗
Real industrial hot rolled reinforcing bar production line with red hot rolled bar and controlled steel manufacturing environment
Orderly warehouse of tagged ribbed steel rebar bundles arranged by diameter and grade
AVAILABILITY BY ENQUIRY

Check HRB500E Rebar Sizes & Lead Times

BAOSTEEL METAL holds 1 million metric tons of regular inventory across its combined steel categories. Availability of individual HRB500E 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.
GRADE VERIFICATION

HRB500E Quality Control & Mill Test Certificates

Project acceptance should link grade identification, actual mechanical tests, laboratory bends and heat chemistry to each delivered batch.

Check the Actual E-Grade Results

  • Heat/lot-linked MTC and genuine rolled 5E producer and nominal-size markings.
  • Measured lower yield ≥500 MPa and tensile strength ≥630 MPa.
  • Measured tensile-to-yield strength ratio ≥1.25 and actual-to-500 MPa yield ratio ≤1.30.
  • Total elongation at maximum force Agt ≥9.0%, with test and reporting basis recorded.
  • 180° bend and reverse-bend records with the correct nominal-diameter mandrels.
  • Chemical analysis, Ceq, rib geometry, length and actual-mass tolerances.
  • Any project-required fatigue test, third-party inspection or connection test documentation.
Acceptance basis: review GB 1499.2-2024, the agreed PO, batch identity and applicable project design. Standard values on a product page are not a substitute for certified actual test results.
Rebar steel material laboratory with actual tensile testing and real mill test certificate documents for 500 MPa E-grade reinforcement
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.
Export length bundles of ribbed steel reinforcing bar tied securely and tagged for 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

HRB500E Steel Rebar Questions

Answers for structural project buyers, rebar fabricators, contractors and overseas steel distributors.

What is HRB500E steel rebar?

HRB500E is a hot-rolled ribbed reinforcing steel grade to GB 1499.2-2024 with a minimum specified yield of 500 MPa, tensile strength of 630 MPa and additional E-grade mechanical and reverse-bend requirements.

Which standard applies to HRB500E in 2026?

GB 1499.2-2024 is the current national standard for hot-rolled ribbed reinforcement. It replaced GB/T 1499.2-2018 when implemented on 25 September 2024.

What does E mean in HRB500E?

The E designates additional seismic-related acceptance controls: actual tensile-to-yield ratio at least 1.25, actual-to-specified yield ratio no more than 1.30, Agt at least 9.0% and reverse-bend testing.

How does HRB500E differ from HRB500?

Both have minimum specified yield 500 MPa and tensile 630 MPa. HRB500E adds measured-ratio checks, 9.0% Agt, reverse-bend testing and 5E grade marking; ordinary HRB500 carries grade mark 5.

Does HRB500E require 15% elongation after fracture?

The 2024 Table 6 lists Agt ≥9.0% for HRB500E and does not list a separate numerical A minimum for the E grade. A and Agt are different test measurements; factory inspection and arbitration follow the standard.

What bend and reverse-bend mandrels apply to HRB500E?

For nominal Ø6–25 mm, Ø28–40 mm and Ø>40–50 mm, the 180° bend mandrels are 6d, 7d and 8d, respectively. For E-grade reverse-bend testing they increase to 7d, 8d and 9d.

What does the 5E rolled marking mean?

5E is the rolled grade identifier for HRB500E. The bar should also show the required producer identification and nominal diameter so it can be reconciled with the package tag and certificate.

Which diameters and nominal weights are standard?

GB 1499.2-2024 covers Ø6–50 mm. For example, Ø20 weighs 2.47 kg/m nominally and Ø25 weighs 3.85 kg/m. Availability, lengths and coil eligibility must be confirmed for the order.

What are the carbon equivalent and refining requirements?

The heat-analysis Ceq maximum for the HRB500E group is 0.55%. GB 1499.2-2024 also specifies secondary refining for HRB500E; review the ordered material and grade traceability documents.

What information is required to quote HRB500E?

Send GB 1499.2-2024, grade HRB500E, diameter-by-diameter schedule, cut lengths, weight or piece counts, MTC and inspection requirements, destination, shipment terms and target delivery dates.

BAOSTEEL METAL / HRB500E REINFORCEMENT

Request Your HRB500E 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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