BAOSTEEL METAL / AUSTRALIAN & NEW ZEALAND STANDARDS

AS/NZS 4671 500N Rebar

AS/NZS 4671:2019 · D500N · NORMAL DUCTILITY REINFORCING STEEL

500 MPa Characteristic YieldNormal Ductility / NR_m/R_e ≥ 1.08A_gt ≥ 5%

Australian D500N bar designationsNominal mass & test records

AUSTRALIAN 500N REBAR SUPPLY ENQUIRIES

Quote to the right steel grade, diameter and compliance basis.

Source ribbed Grade 500N reinforcing steel for structural concrete projects. Compare Australian D500N diameters, declared normal-ductility properties and inspection evidence before confirming bulk orders or fabrication schedules.

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Bundles of ribbed D500N grade steel reinforcing bar in a realistic industrial loading yard without image text

All stock, mill approvals, delivery schedules and inspection documentation are subject to order-specific confirmation.

8 Million MTAnnual output across all steel categories

1 Million MTCombined regular inventory across categories

500,000 m²Factory area

1,000+Company-wide employees

PRODUCT OVERVIEW

What Is AS/NZS 4671 Grade 500N Rebar?

Normal-ductility 500 MPa reinforcing steel is used where the structural design specifies N-class material.

D500N Is a Defined Reinforcement Designation

Under AS/NZS 4671:2019, 500 refers to the specified lower characteristic yield stress in MPa, while N denotes normal ductility. A ribbed 16 mm bar can be designated D500N16; abbreviated schedule notation such as N16 may be used only where the project drawings remove ambiguity.

Grade 500N is widely specified in Australian reinforcing work. The E suffix in 500E denotes a separate seismic-ductility class with different characteristic property limits.

Correct grade matters: Specify the Australian/New Zealand joint standard and the N-class designation. Grade 500N should not be treated as a direct replacement for 500E or other national rebar grades without engineering acceptance.

Four Grade-Defining Checks

≥500Lower characteristic yield stress (MPa)

≤650Upper characteristic yield stress (MPa)

≥1.08Characteristic R_m/R_e lower ratio

≥5%Characteristic uniform elongation A_gt

These values are characteristic statistical criteria defined by the standard. Individual test results and batch acceptance are assessed using the applicable conformity rules, not by treating each figure as a universal single-test limit.

Need D500N for a construction schedule?

Send the drawing specification, nominal sizes, quantities and inspection requirements together.

ORDERING SPECIFICATIONS

AS/NZS 4671 500N Rebar Specifications

Confirm the full designation, product form and project acceptance criteria before requesting a production quotation.

Procurement item	Required 500N specification
Product name	AS NZS 4671 500N Rebar / D500N reinforcing bar
Material standard	AS/NZS 4671:2019 — Steel for the reinforcement of concrete
Standard grade	500N, normal-ductility class N (not seismic class E)
Bar designation	D500N16 for 16 mm deformed ribbed Grade 500N; N16 only if context is unambiguous
Profile	Deformed ribbed bar; confirm approved rib pattern and manufacturer identification
Common AU nominal diameters	Ø10, 12, 16, 20, 24, 28, 32, 36, 40, 50 mm (standard table, not current stock)
Straight bar length	Common procurement lengths are project- or market-specific; confirm exact Ln and tolerance
Coil / decoiled bars	Subject to grade, diameter, producer capability and compliant post-decoiling properties
Yield characteristics	Rek.L ≥500 MPa; Rek.U ≤650 MPa (characteristic values)
Tensile ratio & ductility	(Rm/Re)k.L ≥1.08; Agt,k.L ≥5.0% (characteristic values)
Nominal bar mass	Table 7.5(A) Australian 500N sizes; 7,850 kg/m³ basis and mass tolerance applies
Chemical composition	Cast/product analysis of C, P, S and calculated CEV (see chemistry section)
Acceptance tests	Tensile, bend/rebend by bar size, nominal mass, rib geometry, identification
Documentation	Agreed manufacturer test report, lot/heat references and conformity records
Welding reference	AS/NZS 1554.3 and approved project welding details, as applicable
Quotation fields	Diameter, length, number of bars/MT, supply form, certificate scope and destination

Send These Details With Your RFQ

Specify AS/NZS 4671:2019 / D500N and the project drawing or schedule revision.
List the Australian nominal sizes (such as N12, N16, N20, N24) rather than defaulting to UK Ø25 sizing.
State straight lengths or applicable coil/decoiled form, total pieces, bar marks and required delivery date.
Confirm required producer approvals, test certificates, traceable bundle labels and any independent testing.
Give destination, requested Incoterms and any site handling or pack-length limits.

Buyer approval: Do not infer an Australian product compliance or third-party accreditation claim from a generic manufacturer profile; verify the exact approved mill and production lot.

Close detail of longitudinal and transverse markings on a D500N deformed reinforcing steel bar

AUSTRALIAN D500N SIZE CHART

D500N Rebar Sizes, Cross-Sections & Nominal Weights

Use the Australian 500N bar schedule to check quantities and prevent confusion with UK or New Zealand preferred diameter series.

Australian designation	Nominal area (mm²)	Mass (kg/m)	12 m bar (kg)*	Supply basis
N10 / Ø10	78.5	0.617	7.404	Confirm by mill & order
N12 / Ø12	113	0.888	10.656	Confirm by mill & order
N16 / Ø16	201	1.58	18.960	Confirm by mill & order
N20 / Ø20	314	2.47	29.640	Confirm by mill & order
N24 / Ø24	452	3.55	42.600	Confirm by mill & order
N28 / Ø28	616	4.83	57.960	Confirm by mill & order
N32 / Ø32	804	6.31	75.720	Confirm by mill & order
N36 / Ø36	1020	7.99	95.880	Confirm by mill & order
N40 / Ø40	1260	9.86	118.320	Confirm by mill & order
N50 / Ø50	1960	15.4	184.800	Confirm by mill & order

Source: AS/NZS 4671:2019 Table 7.5(A), Australian 500N size list. Figures are nominal values based on 7,850 kg/m³. The product mass tolerance in Clause 7.3.1 is ±4.5%. The 12 m masses above are calculated from published rounded kg/m, not physical weighing. This Australian list uses 24, 28 and 36 mm; New Zealand Table 7.5(B) provides a different list for 500E. Size listing is not a stock promise.

Want a quantity-based quotation?

Send an Excel bar schedule or diameter-by-diameter totals and preferred lengths.

MECHANICAL PROPERTIES

Grade 500N Mechanical Properties and Ductility

The standard specifies characteristic yield, tensile-ratio and uniform-elongation performance, not one fixed measured tensile strength.

Characteristic property	500N value	Specification basis
Lower characteristic yield stress, R_ek.L	≥ 500 MPa	C_vL: 95% probability basis
Upper characteristic yield stress, R_ek.U	≤ 650 MPa	C_vU: 5% probability basis
Lower characteristic tensile/yield ratio, (R_m/R_e)_k.L	≥ 1.08	C_vL: 90% probability basis
Lower characteristic uniform elongation A_gt,k.L	≥ 5.0%	C_vL: 90% probability basis
Mechanical conformity	Batch + long-term quality assessment	Apply AS/NZS 4671:2019 Appendix A/B as applicable

Interpretation: A 500 MPa characteristic yield and a 1.08 ratio should not be multiplied into an unconditional 540 MPa tensile-strength guarantee for every bar. Check paired measured values and producer conformity documentation.

How to Review the Mill Test Record

Verify that the lot is identified as 500N, rather than 500L or 500E.
Check test condition: hot-worked, cold-worked or straightened and aged as the standard specifies.
Review yield stress R_e, maximum tensile strength R_m, the measured R_m/R_e ratio and A_gt.
Ask for producer batch and long-term quality evidence required by the project.
Confirm the nominal cross-section used for stress calculation and the tested diameter.

Data source: AS/NZS 4671:2019 Table 7.2(A), Table 7.3 and the product-conformity sections.

CHEMISTRY & WELDABILITY

500N Chemical Composition and Carbon Equivalent Limits

The joint standard controls carbon, phosphorus, sulfur and carbon-equivalent values at distinct analysis stages.

Specified parameter	Cast-analysis maximum	Product-analysis maximum
Carbon (C)	≤0.22%	≤0.24%
Phosphorus (P)	≤0.050%	≤0.055%
Sulfur (S)	≤0.050%	≤0.055%
Carbon equivalent (CEV) for 500N	≤0.44%	≤0.46%

AS/NZS 4671:2019 Table 7.1(A). Limits are maximum percentages by mass. Carbon equivalent is calculated from the specified alloying elements; it is not simply the measured carbon value.

Weldability Is a Controlled Process

Steel conforming to AS/NZS 4671 is assessed for weldability under the conditions defined in AS/NZS 1554.3. Site and workshop welding still depend on approved procedures, operator competence, connection design and relevant project specifications.

Request cast and product chemistry with the selected heat/lot identification.
Specify whether the finished reinforcement will be welded, cut, bent or mechanically coupled.
Have the engineer approve weld locations, joint type and procedure.
Do not transfer welding procedures from 500E or other rebar standards by grade number alone.

BEND / REBEND CONTROL

Bending and Rebending Requirements for 500N Bars

Lab bend tests and site bending schedules have different roles. Both depend on diameter, grade and process route.

Standard Mandrel and Test Angles

Nominal diameter	N-class mandrel	Test configuration	Assessment
d ≤16 mm	4d	90° initial bend + 90° reverse bend	Bend/rebend test after required ageing
d >16 mm	4d	180° bend	Bend test; no standard rebend angle

Reference: AS/NZS 4671:2019 Clause 7.2.3 and Table 7.4, for deformed reinforcing bars (excluding mesh). Values above describe material-conformity tests and must not be used automatically as approved site bend diameters.

Handling and Fabrication

When bars will be prefabricated, provide an approved bar-bending schedule including bend angles, radii and cut lengths. Bending, field rebending, welding and re-straightening depend on the governing concrete design and construction specifications.

Real bending test of deformed steel reinforcing bar on an industrial mandrel bending rig

Test-machine image placeholder. Replace with an actual approved industrial photograph.

RIB PATTERN & IDENTIFICATION

How to Identify D500N Rebar

Full marking and traceability must support the grade on each bundle and the mill documentation.

01 / BAR PROFILE

Ribbed Geometry

D500N uses deformed ribbed geometry. Check the transverse ribs, nominal dimensions and required concrete bond performance.

02 / GRADE ID

500N Marking

Grade 500N deformed bars have defined surface marking arrangements, including visible longitudinal or distinguishing short transverse marking patterns.

03 / TRACEABILITY

Producer & Lot

Confirm the producer identification, bundle tag, certificate batch number and bar designation match the delivered order.

Bar identification must be evaluated to AS/NZS 4671:2019 Clause 10 with the producer-specific identification scheme; rib photographs are illustrative and cannot establish certification on their own.

SUPPLY FORMS

Straight-Length, Coil and Cut 500N Rebar

Specify the desired delivery form and confirm that the selected diameter remains conforming after processing.

Straight lengths of hot-rolled Australian grade D500N reinforcing steel rods stored in parallel bundles

Straight Bars

Project-defined bar lengths, bundle quantities and identification. Size-specific supply is confirmed at quotation.

Plain industrial photograph of coiled and bundled reinforcing steel wire rod or small diameter rebar

Coil / Decoiled

Applicable diameter and forming routes need mill confirmation and properties checked after straightening or decoiling.

Clean squared ends of cut deformed reinforcing steel bars organised for construction delivery

Cut Lengths

Optional cutting and bar schedule preparation, subject to confirmed fabrication capacity and site specifications.

CONSTRUCTION APPLICATIONS

Where Is Grade 500N Reinforcement Used?

Typical uses reflect structural drawings and specification requirements; material choice belongs to the project engineer.

Ribbed grade 500N reinforcing bars arranged in a real reinforced concrete slab construction site before pouring

01 / RESIDENTIAL

Foundations & Slabs

Structural slabs, footings and associated reinforcement where the drawing specifies Class N.

02 / COMMERCIAL

Beams & Columns

Concrete frames with diameter-specific reinforcement schedules and engineered anchorage.

03 / CIVIL

Retaining Walls

Civil works and retaining systems requiring compliant ribbed reinforcement.

04 / INDUSTRIAL

Industrial Floors

Equipment bases, heavily loaded floors and site concrete foundations.

05 / PRECAST

Precast Components

Factory-made concrete elements with agreed reinforcement fabrication and batch records.

06 / DISTRIBUTION

Rebar Processing

Bulk bar schedules for stockists, reinforcement processors and contractors.

GRADE SELECTION

500N vs 500E vs 500L: Select by Ductility

The number “500” alone cannot establish interchangeability; the suffix controls key deformation and elongation criteria.

Grade	Ductility class	Lower yield char.	Lower Rm/Re char.	Lower Agt char.	Procurement context
500N	Normal ductility / N	≥ 500 MPa	≥ 1.08	≥ 5.0%	Australian D500N concrete reinforcing bar
500E	Earthquake ductility / E	≥ 500 MPa	≥ 1.15; ≤ 1.40	≥ 10.0%	Seismic-ductility projects; confirm country and design approval
500L	Low ductility / L	≥ 500 MPa	≥ 1.03	≥ 1.5%	Often mesh/fitments; not interchangeable with 500N bars

Characteristic-property summary from AS/NZS 4671:2019 Table 7.2(A). Grade 500E also has an upper characteristic yield value ≤600 MPa and upper Rm/Re ≤1.40. Structural substitutions always require the engineer or approving authority.

CURRENT PAGE / NORMAL DUCTILITY

AS/NZS 4671 500N Rebar

Normal ductility with minimum 500 MPa characteristic yield; D500N Australian bar designations.

NEXT PAGE / SEISMIC CLASS

AS/NZS 4671 500E Rebar

Earthquake ductility grade requiring higher Agt and a controlled upper and lower tensile/yield ratio.

Explore product details →

OTHER STANDARD

ASTM Steel Rebar

Use where the contract explicitly requires ASTM A615 or ASTM A706 rather than AS/NZS 4671.

Explore product details →

WHY BAOSTEEL METAL

A Practical Partner for Rebar Purchasing

Procure by material standard, precise bar size and traceable documentation rather than generic grade labels.

01 / PRODUCTION

8 Million MT Annual Output

Company-wide annual steel output supports multi-category steel procurement.

02 / INVENTORY

1 Million MT Combined Inventory

Company-wide regular inventory enables commercial supply coordination; 500N stock is checked per order.

03 / QUALITY

Traceable Test Requirements

Agree the material standard, product identity and batch-specific inspection documentation.

04 / EXPORT

Bulk Shipment Planning

Coordinate bundle lengths, transport limits, packing lists and Incoterms for international buyers.

The company-wide operating figures describe BAOSTEEL METAL across its product range. They do not represent dedicated D500N output or a promise of immediate 500N inventory.

WEIGHT & QUANTITY ESTIMATOR

AS/NZS 4671 500N Rebar Weight Calculator

Select an Australian N-bar nominal diameter and enter project lengths and quantities for a quick estimate.

Australian 500N Bar Weight Calculator

Estimate metric tonnes using the AS/NZS 4671:2019 Australian Table 7.5(A) nominal kg/m values.

N-bar diameter Nominal mass (kg/m) Length per bar (m) Number of bars

2.964 MTEstimated total theoretical weight

29.640 kgWeight of each bar

100 barsQuantity

Nominal masses are standard table values. Contractual weighing, allowed tolerances, cut length and bundle counts affect actual shipped tonnage.

STEEL PRODUCTION

Manufacturing Route & Product Conformity

The declared grade, processing route and finished condition must be supported by the producer’s test and conformity records.

MAKING RIBBED REINFORCEMENT

Hot-Rolled 500N Bar Supply

Manufacturing may involve bar rolling, controlled cooling, rib formation, cutting and dispatch. Metallurgical and processing routes can differ by producer; the order should identify the actual manufacturer and the form delivered.

Confirm heat and batch references before bundling.
Inspect rib geometry, nominal size and mass against the applicable standard.
Assess any straightening/decoiling operations using the relevant test-piece condition.
Keep inspection evidence connected to bundle identity and order lines.

Real steel rolling mill production line conveying freshly hot-rolled ribbed reinforcing bar

STOCK & BULK ORDERS

Plan Diameter-Specific Availability and Lead Time

Australian N-bar designations and normal market sizes are specification references, not confirmations of live stock.

Organised warehouse stacks of steel reinforcement bars grouped by diameter for bulk industrial orders

REBAR PROCUREMENT

One schedule, clear supply decisions.

Provide nominal N-bar sizes, quantities, lengths, delivery destination and acceptance documents. The team can then check applicable stock, production route and shipment arrangements for the actual proposed material.

Specify each diameter on a separate quotation line.
Request confirmation of the approved production mill, country of origin and certificates.
Check container length, bundle weight, handling equipment and route constraints.
Confirm the final commercial lead time only after mill and logistics review.

INSPECTION & MILL REPORTS

500N Rebar Quality Control and Traceability

Select documentation and testing that the engineer, importer and receiving project actually require.

Inspection Checklist

The actual lot is marked D500N / grade 500N to the correct AS/NZS 4671 edition.
Cast and product analyses include C, P, S and the calculated carbon equivalent CEV.
Tensile test records list R_e, R_m, R_m/R_e, A_gt and grade-specific statistics.
Bend or rebend evidence corresponds to nominal diameter, N class and the applicable preparation.
Bar mass, rib geometry and marks are consistent with conformity reporting.
Producer documentation and mill/heat identification match the supplied bundles.

Any local approval, third-party accreditation, registered bar mark or import conformity statement must be checked for the specific producer and product — not assumed from a generic product description.

Actual Testing & Documentation

AS/NZS 4671:2019 uses manufacturer product conformity controls, batch assessment and long-term quality evidence. Buyers should specify certificates and permitted laboratories before purchase and inspect the actual order-linked documents.

Quality control inspector examining steel reinforcement rib markings and measurement records at an industrial testing laboratory

OPTIONAL CUTTING & FABRICATION

Cut-Length and Bar-Schedule Processing

Optional processing is arranged only when the required grade, size, drawings and equipment suitability have been confirmed.

01 / CUT LENGTHS

Bar Cutting

Specify precise cut lengths, batch identification, edge condition and how the cut pieces are packed.

02 / BEND SCHEDULE

Approved Bar Shapes

Provide the engineer-approved shape schedule and the applicable Australian/NZ construction requirements; bend radii are design-specific.

03 / HANDLING

Welding & Couplers

Approved welding, threading or mechanical couplers must be designed for the selected grade and checked for processing compatibility.

Compliance with laboratory bend and rebend test requirements is separate from permission to rebend a bar on site. Project-specific rules and engineering approval govern fabrication and field handling.

Have a 500N cut-and-bend schedule?

Send the drawing, diameter, intended bend radii, quantity and material certification scope.

BUNDLING & EXPORT DELIVERY

Export Packing for D500N Rebar Orders

Arrange bundles and shipping records around grade, bar mark, diameter and heat/batch traceability.

Secured bundles of ribbed reinforcement bars with simple tie wires and plain traceability tags for export

BULK DISPATCH

Easy-to-identify steel bundles.

Shipping plans can include secured bar bundles, weather-appropriate protective handling, batch reference tags, packing list and agreed inspection documentation. Pack and bundle dimensions should be checked against container, truck or berth limitations.

Confirm bundle and total shipment mass.
Keep grade, producer and batch tags aligned with testing records.
Specify destination, loading type and agreed Incoterms.
Verify material acceptance requirements at the importing destination.

PROCUREMENT FAQ

AS/NZS 4671 500N Rebar Questions

Practical answers for structural contractors, reinforcement processors, engineering purchasing teams and international distributors.

What does 500N mean in AS/NZS 4671?

500 identifies the 500 MPa lower characteristic yield strength, while N means normal ductility. For a deformed ribbed 16 mm bar, D500N16 is a full designation; N16 may be used when the context is unambiguous.

What is the current AS/NZS 4671 edition?

AS/NZS 4671:2019 is the edition referenced on this page. Contracts should cite the applicable edition and any required project approvals.

Is 500N the same as 500E?

No. 500N has normal ductility requirements; 500E is a seismic class with a characteristic Agt at least 10%, tensile/yield ratio between 1.15 and 1.40 and upper yield limit 600 MPa.

What are the characteristic 500N mechanical requirements?

Lower characteristic yield ≥500 MPa, upper characteristic yield ≤650 MPa, lower tensile/yield ratio ≥1.08 and lower Agt ≥5%. Single-test acceptance follows the full conformity provisions.

Does 500N always guarantee 540 MPa tensile strength?

Not as a single fixed value for every bar. The standard uses characteristic yield and a characteristic tensile/yield ratio, with producer conformance and measured tests assessed by its specified procedures.

Which sizes are typical Australian D500N rebar sizes?

The Australian standard mass table lists nominal diameters 10, 12, 16, 20, 24, 28, 32, 36, 40 and 50 mm. Availability is mill- and order-dependent.

What does an N20 bar weigh?

AS/NZS 4671:2019 lists a nominal mass of 2.47 kg/m for Australian 500N N20. A 12 m bar is 29.64 kg and 100 bars are about 2.964 metric tonnes.

What chemical limits apply to 500N?

Cast-analysis maxima are C 0.22%, P 0.050%, S 0.050%, CEV 0.44%. Product-analysis limits are C 0.24%, P/S 0.055% and CEV 0.46%.

Is D500N suitable for welding?

The material specification addresses weldability under AS/NZS 1554.3 conditions. Actual welds still require the project-approved procedure, design and qualified execution.

How are 500N bars tested for bending?

For N-class deformed bars up to 16 mm, the standard specifies a 4d mandrel and the applicable 90° bend/rebend test. For diameters above 16 mm, it specifies a 4d mandrel with 180° bending.

Are coil and decoiled 500N bars available?

Coiled or decoiled forms may be possible for eligible sizes and processing routes. The producing mill and post-processing mechanical properties must be confirmed for the order.

How do we request a 500N bulk quotation?

Provide AS/NZS 4671:2019, grade D500N, nominal diameters, bar lengths and quantity/tonnage, required certificates, approved producer restrictions, destination and Incoterms.

BAOSTEEL METAL / AS-NZS REBAR

Request an AS/NZS 4671 500N Rebar Quote

Send D500N bar diameters, lengths, quantities and the specified edition of AS/NZS 4671, together with accepted mill documentation, any fabrication schedule and delivery destination. We will confirm order-specific supply options.

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